Merge pull request #9496 from protocolbuffers/duplicates

Remove Proto3LiteTest.kt
diff --git a/csharp/src/Google.Protobuf.Test/JsonFormatterTest.cs b/csharp/src/Google.Protobuf.Test/JsonFormatterTest.cs
index 1a65093..51fa5e0 100644
--- a/csharp/src/Google.Protobuf.Test/JsonFormatterTest.cs
+++ b/csharp/src/Google.Protobuf.Test/JsonFormatterTest.cs
@@ -1,698 +1,705 @@
-#region Copyright notice and license
-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc.  All rights reserved.
-// https://developers.google.com/protocol-buffers/
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#endregion
-
-using System;
-using Google.Protobuf.TestProtos;
-using NUnit.Framework;
-using UnitTest.Issues.TestProtos;
-using Google.Protobuf.WellKnownTypes;
-using Google.Protobuf.Reflection;
-
-using static Google.Protobuf.JsonParserTest; // For WrapInQuotes
-using System.IO;
-using Google.Protobuf.Collections;
-using ProtobufUnittest;
-
-namespace Google.Protobuf
-{
-    /// <summary>
-    /// Tests for the JSON formatter. Note that in these tests, double quotes are replaced with apostrophes
-    /// for the sake of readability (embedding \" everywhere is painful). See the AssertJson method for details.
-    /// </summary>
-    public class JsonFormatterTest
-    {
-        [Test]
-        public void DefaultValues_WhenOmitted()
-        {
-            var formatter = JsonFormatter.Default;
-
-            AssertJson("{ }", formatter.Format(new ForeignMessage()));
-            AssertJson("{ }", formatter.Format(new TestAllTypes()));
-            AssertJson("{ }", formatter.Format(new TestMap()));
-        }
-
-        [Test]
-        public void DefaultValues_WhenIncluded()
-        {
-            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));
-            AssertJson("{ 'c': 0 }", formatter.Format(new ForeignMessage()));
-        }
-
-        [Test]
-        public void EnumAllowAlias()
-        {
-            var message = new TestEnumAllowAlias
-            {
-                Value = TestEnumWithDupValue.Foo2,
-            };
-            var actualText = JsonFormatter.Default.Format(message);
-            var expectedText = "{ 'value': 'FOO1' }";
-            AssertJson(expectedText, actualText);
-        }
-
-        [Test]
-        public void EnumAsInt()
-        {
-            var message = new TestAllTypes
-            {
-                SingleForeignEnum = ForeignEnum.ForeignBar,
-                RepeatedForeignEnum = { ForeignEnum.ForeignBaz, (ForeignEnum) 100, ForeignEnum.ForeignFoo }
-            };
-            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatEnumsAsIntegers(true));
-            var actualText = formatter.Format(message);
-            var expectedText = "{ " +
-                               "'singleForeignEnum': 5, " +
-                               "'repeatedForeignEnum': [ 6, 100, 4 ]" +
-                               " }";
-            AssertJson(expectedText, actualText);
-        }
-
-        [Test]
-        public void AllSingleFields()
-        {
-            var message = new TestAllTypes
-            {
-                SingleBool = true,
-                SingleBytes = ByteString.CopyFrom(1, 2, 3, 4),
-                SingleDouble = 23.5,
-                SingleFixed32 = 23,
-                SingleFixed64 = 1234567890123,
-                SingleFloat = 12.25f,
-                SingleForeignEnum = ForeignEnum.ForeignBar,
-                SingleForeignMessage = new ForeignMessage { C = 10 },
-                SingleImportEnum = ImportEnum.ImportBaz,
-                SingleImportMessage = new ImportMessage { D = 20 },
-                SingleInt32 = 100,
-                SingleInt64 = 3210987654321,
-                SingleNestedEnum = TestAllTypes.Types.NestedEnum.Foo,
-                SingleNestedMessage = new TestAllTypes.Types.NestedMessage { Bb = 35 },
-                SinglePublicImportMessage = new PublicImportMessage { E = 54 },
-                SingleSfixed32 = -123,
-                SingleSfixed64 = -12345678901234,
-                SingleSint32 = -456,
-                SingleSint64 = -12345678901235,
-                SingleString = "test\twith\ttabs",
-                SingleUint32 = uint.MaxValue,
-                SingleUint64 = ulong.MaxValue,
-            };
-            var actualText = JsonFormatter.Default.Format(message);
-
-            // Fields in numeric order
-            var expectedText = "{ " +
-                "'singleInt32': 100, " +
-                "'singleInt64': '3210987654321', " +
-                "'singleUint32': 4294967295, " +
-                "'singleUint64': '18446744073709551615', " +
-                "'singleSint32': -456, " +
-                "'singleSint64': '-12345678901235', " +
-                "'singleFixed32': 23, " +
-                "'singleFixed64': '1234567890123', " +
-                "'singleSfixed32': -123, " +
-                "'singleSfixed64': '-12345678901234', " +
-                "'singleFloat': 12.25, " +
-                "'singleDouble': 23.5, " +
-                "'singleBool': true, " +
-                "'singleString': 'test\\twith\\ttabs', " +
-                "'singleBytes': 'AQIDBA==', " +
-                "'singleNestedMessage': { 'bb': 35 }, " +
-                "'singleForeignMessage': { 'c': 10 }, " +
-                "'singleImportMessage': { 'd': 20 }, " +
-                "'singleNestedEnum': 'FOO', " +
-                "'singleForeignEnum': 'FOREIGN_BAR', " +
-                "'singleImportEnum': 'IMPORT_BAZ', " +
-                "'singlePublicImportMessage': { 'e': 54 }" +
-                " }";
-            AssertJson(expectedText, actualText);
-        }
-
-        [Test]
-        public void WithFormatDefaultValues_DoesNotAffectMessageFields()
-        {
-            var message = new TestAllTypes();
-            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));
-            var json = formatter.Format(message);
-            Assert.IsFalse(json.Contains("\"singleNestedMessage\""));
-            Assert.IsFalse(json.Contains("\"singleForeignMessage\""));
-            Assert.IsFalse(json.Contains("\"singleImportMessage\""));
-        }
-
-        [Test]
-        public void WithFormatDefaultValues_DoesNotAffectProto3OptionalFields()
-        {
-            var message = new TestProto3Optional();
-            message.OptionalInt32 = 0;
-            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));
-            var json = formatter.Format(message);
-            // The non-optional proto3 fields are formatted, as is the optional-but-specified field.
-            AssertJson("{ 'optionalInt32': 0, 'singularInt32': 0, 'singularInt64': '0' }", json);
-        }
-
-        [Test]
-        public void WithFormatDefaultValues_DoesNotAffectProto2Fields()
-        {
-            var message = new TestProtos.Proto2.ForeignMessage();
-            message.C = 0;
-            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));
-            var json = formatter.Format(message);
-            // The specified field is formatted, but the non-specified field (d) is not.
-            AssertJson("{ 'c': 0 }", json);
-        }
-
-        [Test]
-        public void WithFormatDefaultValues_DoesNotAffectOneofFields()
-        {
-            var message = new TestOneof();
-            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));
-            var json = formatter.Format(message);
-            AssertJson("{ }", json);
-        }
-
-        [Test]
-        public void RepeatedField()
-        {
-            AssertJson("{ 'repeatedInt32': [ 1, 2, 3, 4, 5 ] }",
-                JsonFormatter.Default.Format(new TestAllTypes { RepeatedInt32 = { 1, 2, 3, 4, 5 } }));
-        }
-
-        [Test]
-        public void MapField_StringString()
-        {
-            AssertJson("{ 'mapStringString': { 'with spaces': 'bar', 'a': 'b' } }",
-                JsonFormatter.Default.Format(new TestMap { MapStringString = { { "with spaces", "bar" }, { "a", "b" } } }));
-        }
-
-        [Test]
-        public void MapField_Int32Int32()
-        {
-            // The keys are quoted, but the values aren't.
-            AssertJson("{ 'mapInt32Int32': { '0': 1, '2': 3 } }",
-                JsonFormatter.Default.Format(new TestMap { MapInt32Int32 = { { 0, 1 }, { 2, 3 } } }));
-        }
-
-        [Test]
-        public void MapField_BoolBool()
-        {
-            // The keys are quoted, but the values aren't.
-            AssertJson("{ 'mapBoolBool': { 'false': true, 'true': false } }",
-                JsonFormatter.Default.Format(new TestMap { MapBoolBool = { { false, true }, { true, false } } }));
-        }
-
-        [Test]
-        public void NullValueOutsideStruct()
-        {
-            var message = new NullValueOutsideStruct { NullValue = NullValue.NullValue };
-            AssertJson("{ 'nullValue': null }", JsonFormatter.Default.Format(message));
-        }
-
-        [Test]
-        public void NullValueNotInOneof()
-        {
-            var message = new NullValueNotInOneof();
-            AssertJson("{ }", JsonFormatter.Default.Format(message));
-        }
-
-        [Test]
-        public void NullValueNotInOneof_FormatDefaults()
-        {
-            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));
-            var message = new NullValueNotInOneof();
-            AssertJson("{ 'nullValue': null }", formatter.Format(message));
-        }
-
-        [TestCase(1.0, "1")]
-        [TestCase(double.NaN, "'NaN'")]
-        [TestCase(double.PositiveInfinity, "'Infinity'")]
-        [TestCase(double.NegativeInfinity, "'-Infinity'")]
-        public void DoubleRepresentations(double value, string expectedValueText)
-        {
-            var message = new TestAllTypes { SingleDouble = value };
-            string actualText = JsonFormatter.Default.Format(message);
-            string expectedText = "{ 'singleDouble': " + expectedValueText + " }";
-            AssertJson(expectedText, actualText);
-        }
-
-        [Test]
-        public void UnknownEnumValueNumeric_SingleField()
-        {
-            var message = new TestAllTypes { SingleForeignEnum = (ForeignEnum) 100 };
-            AssertJson("{ 'singleForeignEnum': 100 }", JsonFormatter.Default.Format(message));
-        }
-
-        [Test]
-        public void UnknownEnumValueNumeric_RepeatedField()
-        {
-            var message = new TestAllTypes { RepeatedForeignEnum = { ForeignEnum.ForeignBaz, (ForeignEnum) 100, ForeignEnum.ForeignFoo } };
-            AssertJson("{ 'repeatedForeignEnum': [ 'FOREIGN_BAZ', 100, 'FOREIGN_FOO' ] }", JsonFormatter.Default.Format(message));
-        }
-
-        [Test]
-        public void UnknownEnumValueNumeric_MapField()
-        {
-            var message = new TestMap { MapInt32Enum = { { 1, MapEnum.Foo }, { 2, (MapEnum) 100 }, { 3, MapEnum.Bar } } };
-            AssertJson("{ 'mapInt32Enum': { '1': 'MAP_ENUM_FOO', '2': 100, '3': 'MAP_ENUM_BAR' } }", JsonFormatter.Default.Format(message));
-        }
-
-        [Test]
-        public void UnknownEnumValue_RepeatedField_AllEntriesUnknown()
-        {
-            var message = new TestAllTypes { RepeatedForeignEnum = { (ForeignEnum) 200, (ForeignEnum) 100 } };
-            AssertJson("{ 'repeatedForeignEnum': [ 200, 100 ] }", JsonFormatter.Default.Format(message));
-        }
-
-        [Test]
-        [TestCase("a\u17b4b", "a\\u17b4b")] // Explicit
-        [TestCase("a\u0601b", "a\\u0601b")] // Ranged
-        [TestCase("a\u0605b", "a\u0605b")] // Passthrough (note lack of double backslash...)
-        public void SimpleNonAscii(string text, string encoded)
-        {
-            var message = new TestAllTypes { SingleString = text };
-            AssertJson("{ 'singleString': '" + encoded + "' }", JsonFormatter.Default.Format(message));
-        }
-
-        [Test]
-        public void SurrogatePairEscaping()
-        {
-            var message = new TestAllTypes { SingleString = "a\uD801\uDC01b" };
-            AssertJson("{ 'singleString': 'a\\ud801\\udc01b' }", JsonFormatter.Default.Format(message));
-        }
-
-        [Test]
-        public void InvalidSurrogatePairsFail()
-        {
-            // Note: don't use TestCase for these, as the strings can't be reliably represented
-            // See http://codeblog.jonskeet.uk/2014/11/07/when-is-a-string-not-a-string/
-
-            // Lone low surrogate
-            var message = new TestAllTypes { SingleString = "a\uDC01b" };
-            Assert.Throws<ArgumentException>(() => JsonFormatter.Default.Format(message));
-
-            // Lone high surrogate
-            message = new TestAllTypes { SingleString = "a\uD801b" };
-            Assert.Throws<ArgumentException>(() => JsonFormatter.Default.Format(message));
-        }
-
-        [Test]
-        [TestCase("foo_bar", "fooBar")]
-        [TestCase("bananaBanana", "bananaBanana")]
-        [TestCase("BANANABanana", "BANANABanana")]
-        [TestCase("simple", "simple")]
-        [TestCase("ACTION_AND_ADVENTURE", "ACTIONANDADVENTURE")]
-        [TestCase("action_and_adventure", "actionAndAdventure")]
-        [TestCase("kFoo", "kFoo")]
-        [TestCase("HTTPServer", "HTTPServer")]
-        [TestCase("CLIENT", "CLIENT")]
-        public void ToJsonName(string original, string expected)
-        {
-            Assert.AreEqual(expected, JsonFormatter.ToJsonName(original));
-        }
-
-        [Test]
-        [TestCase(null, "{ }")]
-        [TestCase("x", "{ 'fooString': 'x' }")]
-        [TestCase("", "{ 'fooString': '' }")]
-        public void Oneof(string fooStringValue, string expectedJson)
-        {
-            var message = new TestOneof();
-            if (fooStringValue != null)
-            {
-                message.FooString = fooStringValue;
-            }
-
-            // We should get the same result both with and without "format default values".
-            var formatter = JsonFormatter.Default;
-            AssertJson(expectedJson, formatter.Format(message));
-            formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));
-            AssertJson(expectedJson, formatter.Format(message));
-        }
-
-        [Test]
-        public void WrapperFormatting_Single()
-        {
-            // Just a few examples, handling both classes and value types, and
-            // default vs non-default values
-            var message = new TestWellKnownTypes
-            {
-                Int64Field = 10,
-                Int32Field = 0,
-                BytesField = ByteString.FromBase64("ABCD"),
-                StringField = ""
-            };
-            var expectedJson = "{ 'int64Field': '10', 'int32Field': 0, 'stringField': '', 'bytesField': 'ABCD' }";
-            AssertJson(expectedJson, JsonFormatter.Default.Format(message));
-        }
-
-        [Test]
-        public void WrapperFormatting_Message()
-        {
-            Assert.AreEqual("\"\"", JsonFormatter.Default.Format(new StringValue()));
-            Assert.AreEqual("0", JsonFormatter.Default.Format(new Int32Value()));
-        }
-
-        [Test]
-        public void WrapperFormatting_FormatDefaultValuesDoesNotFormatNull()
-        {
-            // The actual JSON here is very large because there are lots of fields. Just test a couple of them.
-            var message = new TestWellKnownTypes { Int32Field = 10 };
-            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));
-            var actualJson = formatter.Format(message);
-            // This *used* to include "int64Field": null, but that was a bug.
-            // WithDefaultValues should not affect message fields, including wrapper types.
-            Assert.IsFalse(actualJson.Contains("\"int64Field\": null"));
-            Assert.IsTrue(actualJson.Contains("\"int32Field\": 10"));
-        }
-
-        [Test]
-        public void OutputIsInNumericFieldOrder_NoDefaults()
-        {
-            var formatter = JsonFormatter.Default;
-            var message = new TestJsonFieldOrdering { PlainString = "p1", PlainInt32 = 2 };
-            AssertJson("{ 'plainString': 'p1', 'plainInt32': 2 }", formatter.Format(message));
-            message = new TestJsonFieldOrdering { O1Int32 = 5, O2String = "o2", PlainInt32 = 10, PlainString = "plain" };
-            AssertJson("{ 'plainString': 'plain', 'o2String': 'o2', 'plainInt32': 10, 'o1Int32': 5 }", formatter.Format(message));
-            message = new TestJsonFieldOrdering { O1String = "", O2Int32 = 0, PlainInt32 = 10, PlainString = "plain" };
-            AssertJson("{ 'plainString': 'plain', 'o1String': '', 'plainInt32': 10, 'o2Int32': 0 }", formatter.Format(message));
-        }
-
-        [Test]
-        public void OutputIsInNumericFieldOrder_WithDefaults()
-        {
-            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));
-            var message = new TestJsonFieldOrdering();
-            AssertJson("{ 'plainString': '', 'plainInt32': 0 }", formatter.Format(message));
-            message = new TestJsonFieldOrdering { O1Int32 = 5, O2String = "o2", PlainInt32 = 10, PlainString = "plain" };
-            AssertJson("{ 'plainString': 'plain', 'o2String': 'o2', 'plainInt32': 10, 'o1Int32': 5 }", formatter.Format(message));
-            message = new TestJsonFieldOrdering { O1String = "", O2Int32 = 0, PlainInt32 = 10, PlainString = "plain" };
-            AssertJson("{ 'plainString': 'plain', 'o1String': '', 'plainInt32': 10, 'o2Int32': 0 }", formatter.Format(message));
-        }
-
-        [Test]
-        [TestCase("1970-01-01T00:00:00Z", 0)]
-        [TestCase("1970-01-01T00:00:00.000000001Z", 1)]
-        [TestCase("1970-01-01T00:00:00.000000010Z", 10)]
-        [TestCase("1970-01-01T00:00:00.000000100Z", 100)]
-        [TestCase("1970-01-01T00:00:00.000001Z", 1000)]
-        [TestCase("1970-01-01T00:00:00.000010Z", 10000)]
-        [TestCase("1970-01-01T00:00:00.000100Z", 100000)]
-        [TestCase("1970-01-01T00:00:00.001Z", 1000000)]
-        [TestCase("1970-01-01T00:00:00.010Z", 10000000)]
-        [TestCase("1970-01-01T00:00:00.100Z", 100000000)]
-        [TestCase("1970-01-01T00:00:00.120Z", 120000000)]
-        [TestCase("1970-01-01T00:00:00.123Z", 123000000)]
-        [TestCase("1970-01-01T00:00:00.123400Z", 123400000)]
-        [TestCase("1970-01-01T00:00:00.123450Z", 123450000)]
-        [TestCase("1970-01-01T00:00:00.123456Z", 123456000)]
-        [TestCase("1970-01-01T00:00:00.123456700Z", 123456700)]
-        [TestCase("1970-01-01T00:00:00.123456780Z", 123456780)]
-        [TestCase("1970-01-01T00:00:00.123456789Z", 123456789)]
-        public void TimestampStandalone(string expected, int nanos)
-        {
-            Assert.AreEqual(WrapInQuotes(expected), new Timestamp { Nanos = nanos }.ToString());
-        }
-
-        [Test]
-        public void TimestampStandalone_FromDateTime()
-        {
-            // One before and one after the Unix epoch, more easily represented via DateTime.
-            Assert.AreEqual("\"1673-06-19T12:34:56Z\"",
-                new DateTime(1673, 6, 19, 12, 34, 56, DateTimeKind.Utc).ToTimestamp().ToString());
-            Assert.AreEqual("\"2015-07-31T10:29:34Z\"",
-                new DateTime(2015, 7, 31, 10, 29, 34, DateTimeKind.Utc).ToTimestamp().ToString());
-        }
-
-        [Test]
-        [TestCase(-1, -1)] // Would be valid as duration
-        [TestCase(1, Timestamp.MaxNanos + 1)]
-        [TestCase(Timestamp.UnixSecondsAtBclMaxValue + 1, 0)]
-        [TestCase(Timestamp.UnixSecondsAtBclMinValue - 1, 0)]
-        public void TimestampStandalone_NonNormalized(long seconds, int nanoseconds)
-        {
-            var timestamp = new Timestamp { Seconds = seconds, Nanos = nanoseconds };
-            Assert.Throws<InvalidOperationException>(() => JsonFormatter.Default.Format(timestamp));
-        }
-
-        [Test]
-        public void TimestampField()
-        {
-            var message = new TestWellKnownTypes { TimestampField = new Timestamp() };
-            AssertJson("{ 'timestampField': '1970-01-01T00:00:00Z' }", JsonFormatter.Default.Format(message));
-        }
-
-        [Test]
-        [TestCase(0, 0, "0s")]
-        [TestCase(1, 0, "1s")]
-        [TestCase(-1, 0, "-1s")]
-        [TestCase(0, 1, "0.000000001s")]
-        [TestCase(0, 10, "0.000000010s")]
-        [TestCase(0, 100, "0.000000100s")]
-        [TestCase(0, 1000, "0.000001s")]
-        [TestCase(0, 10000, "0.000010s")]
-        [TestCase(0, 100000, "0.000100s")]
-        [TestCase(0, 1000000, "0.001s")]
-        [TestCase(0, 10000000, "0.010s")]
-        [TestCase(0, 100000000, "0.100s")]
-        [TestCase(0, 120000000, "0.120s")]
-        [TestCase(0, 123000000, "0.123s")]
-        [TestCase(0, 123400000, "0.123400s")]
-        [TestCase(0, 123450000, "0.123450s")]
-        [TestCase(0, 123456000, "0.123456s")]
-        [TestCase(0, 123456700, "0.123456700s")]
-        [TestCase(0, 123456780, "0.123456780s")]
-        [TestCase(0, 123456789, "0.123456789s")]
-        [TestCase(0, -100000000, "-0.100s")]
-        [TestCase(1, 100000000, "1.100s")]
-        [TestCase(-1, -100000000, "-1.100s")]
-        public void DurationStandalone(long seconds, int nanoseconds, string expected)
-        {
-            var json = JsonFormatter.Default.Format(new Duration { Seconds = seconds, Nanos = nanoseconds });
-            Assert.AreEqual(WrapInQuotes(expected), json);
-        }
-
-        [Test]
-        [TestCase(1, 2123456789)]
-        [TestCase(1, -100000000)]
-        public void DurationStandalone_NonNormalized(long seconds, int nanoseconds)
-        {
-            var duration = new Duration { Seconds = seconds, Nanos = nanoseconds };
-            Assert.Throws<InvalidOperationException>(() => JsonFormatter.Default.Format(duration));
-        }
-
-        [Test]
-        public void DurationField()
-        {
-            var message = new TestWellKnownTypes { DurationField = new Duration() };
-            AssertJson("{ 'durationField': '0s' }", JsonFormatter.Default.Format(message));
-        }
-
-        [Test]
-        public void StructSample()
-        {
-            var message = new Struct
-            {
-                Fields =
-                {
-                    { "a", Value.ForNull() },
-                    { "b", Value.ForBool(false) },
-                    { "c", Value.ForNumber(10.5) },
-                    { "d", Value.ForString("text") },
-                    { "e", Value.ForList(Value.ForString("t1"), Value.ForNumber(5)) },
-                    { "f", Value.ForStruct(new Struct { Fields = { { "nested", Value.ForString("value") } } }) }
-                }
-            };
-            AssertJson("{ 'a': null, 'b': false, 'c': 10.5, 'd': 'text', 'e': [ 't1', 5 ], 'f': { 'nested': 'value' } }", message.ToString());
-        }
-
-        [Test]
-        [TestCase("foo__bar")]
-        [TestCase("foo_3_ar")]
-        [TestCase("fooBar")]
-        public void FieldMaskInvalid(string input)
-        {
-            var mask = new FieldMask { Paths = { input } };
-            Assert.Throws<InvalidOperationException>(() => JsonFormatter.Default.Format(mask));
-        }
-
-        [Test]
-        public void FieldMaskStandalone()
-        {
-            var fieldMask = new FieldMask { Paths = { "", "single", "with_underscore", "nested.field.name", "nested..double_dot" } };
-            Assert.AreEqual("\",single,withUnderscore,nested.field.name,nested..doubleDot\"", fieldMask.ToString());
-
-            // Invalid, but we shouldn't create broken JSON...
-            fieldMask = new FieldMask { Paths = { "x\\y" } };
-            Assert.AreEqual(@"""x\\y""", fieldMask.ToString());
-        }
-
-        [Test]
-        public void FieldMaskField()
-        {
-            var message = new TestWellKnownTypes { FieldMaskField = new FieldMask { Paths = { "user.display_name", "photo" } } };
-            AssertJson("{ 'fieldMaskField': 'user.displayName,photo' }", JsonFormatter.Default.Format(message));
-        }
-
-        // SourceContext is an example of a well-known type with no special JSON handling
-        [Test]
-        public void SourceContextStandalone()
-        {
-            var message = new SourceContext { FileName = "foo.proto" };
-            AssertJson("{ 'fileName': 'foo.proto' }", JsonFormatter.Default.Format(message));
-        }
-
-        [Test]
-        public void AnyWellKnownType()
-        {
-            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithTypeRegistry(TypeRegistry.FromMessages(Timestamp.Descriptor)));
-            var timestamp = new DateTime(1673, 6, 19, 12, 34, 56, DateTimeKind.Utc).ToTimestamp();
-            var any = Any.Pack(timestamp);
-            AssertJson("{ '@type': 'type.googleapis.com/google.protobuf.Timestamp', 'value': '1673-06-19T12:34:56Z' }", formatter.Format(any));
-        }
-
-        [Test]
-        public void AnyMessageType()
-        {
-            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithTypeRegistry(TypeRegistry.FromMessages(TestAllTypes.Descriptor)));
-            var message = new TestAllTypes { SingleInt32 = 10, SingleNestedMessage = new TestAllTypes.Types.NestedMessage { Bb = 20 } };
-            var any = Any.Pack(message);
-            AssertJson("{ '@type': 'type.googleapis.com/protobuf_unittest3.TestAllTypes', 'singleInt32': 10, 'singleNestedMessage': { 'bb': 20 } }", formatter.Format(any));
-        }
-
-        [Test]
-        public void AnyMessageType_CustomPrefix()
-        {
-            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithTypeRegistry(TypeRegistry.FromMessages(TestAllTypes.Descriptor)));
-            var message = new TestAllTypes { SingleInt32 = 10 };
-            var any = Any.Pack(message, "foo.bar/baz");
-            AssertJson("{ '@type': 'foo.bar/baz/protobuf_unittest3.TestAllTypes', 'singleInt32': 10 }", formatter.Format(any));
-        }
-
-        [Test]
-        public void AnyNested()
-        {
-            var registry = TypeRegistry.FromMessages(TestWellKnownTypes.Descriptor, TestAllTypes.Descriptor);
-            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithTypeRegistry(registry));
-
-            // Nest an Any as the value of an Any.
-            var doubleNestedMessage = new TestAllTypes { SingleInt32 = 20 };
-            var nestedMessage = Any.Pack(doubleNestedMessage);
-            var message = new TestWellKnownTypes { AnyField = Any.Pack(nestedMessage) };
-            AssertJson("{ 'anyField': { '@type': 'type.googleapis.com/google.protobuf.Any', 'value': { '@type': 'type.googleapis.com/protobuf_unittest3.TestAllTypes', 'singleInt32': 20 } } }",
-                formatter.Format(message));
-        }
-
-        [Test]
-        public void AnyUnknownType()
-        {
-            // The default type registry doesn't have any types in it.
-            var message = new TestAllTypes();
-            var any = Any.Pack(message);
-            Assert.Throws<InvalidOperationException>(() => JsonFormatter.Default.Format(any));
-        }
-
-        [Test]
-        [TestCase(typeof(BoolValue), true, "true")]
-        [TestCase(typeof(Int32Value), 32, "32")]
-        [TestCase(typeof(Int64Value), 32L, "\"32\"")]
-        [TestCase(typeof(UInt32Value), 32U, "32")]
-        [TestCase(typeof(UInt64Value), 32UL, "\"32\"")]
-        [TestCase(typeof(StringValue), "foo", "\"foo\"")]
-        [TestCase(typeof(FloatValue), 1.5f, "1.5")]
-        [TestCase(typeof(DoubleValue), 1.5d, "1.5")]
-        public void Wrappers_Standalone(System.Type wrapperType, object value, string expectedJson)
-        {
-            IMessage populated = (IMessage)Activator.CreateInstance(wrapperType);
-            populated.Descriptor.Fields[WrappersReflection.WrapperValueFieldNumber].Accessor.SetValue(populated, value);
-            Assert.AreEqual(expectedJson, JsonFormatter.Default.Format(populated));
-        }
-
-        // Sanity tests for WriteValue. Not particularly comprehensive, as it's all covered above already,
-        // as FormatMessage uses WriteValue.
-
-        [TestCase(null, "null")]
-        [TestCase(1, "1")]
-        [TestCase(1L, "'1'")]
-        [TestCase(0.5f, "0.5")]
-        [TestCase(0.5d, "0.5")]
-        [TestCase("text", "'text'")]
-        [TestCase("x\ny", @"'x\ny'")]
-        [TestCase(ForeignEnum.ForeignBar, "'FOREIGN_BAR'")]
-        public void WriteValue_Constant(object value, string expectedJson)
-        {
-            AssertWriteValue(value, expectedJson);
-        }
-
-        [Test]
-        public void WriteValue_Timestamp()
-        {
-            var value = new DateTime(1673, 6, 19, 12, 34, 56, DateTimeKind.Utc).ToTimestamp();
-            AssertWriteValue(value, "'1673-06-19T12:34:56Z'");
-        }
-
-        [Test]
-        public void WriteValue_Message()
-        {
-            var value = new TestAllTypes { SingleInt32 = 100, SingleInt64 = 3210987654321L };
-            AssertWriteValue(value, "{ 'singleInt32': 100, 'singleInt64': '3210987654321' }");
-        }
-
-        [Test]
-        public void WriteValue_List()
-        {
-            var value = new RepeatedField<int> { 1, 2, 3 };
-            AssertWriteValue(value, "[ 1, 2, 3 ]");
-        }
-
-        [Test]
-        public void Proto2_DefaultValuesWritten()
-        {
-            var value = new ProtobufTestMessages.Proto2.TestAllTypesProto2() { FieldName13 = 0 };
-            AssertWriteValue(value, "{ 'FieldName13': 0 }");
-        }
-
-        private static void AssertWriteValue(object value, string expectedJson)
-        {
-            var writer = new StringWriter();
-            JsonFormatter.Default.WriteValue(writer, value);
-            string actual = writer.ToString();
-            AssertJson(expectedJson, actual);
-        }
-
-        /// <summary>
-        /// Checks that the actual JSON is the same as the expected JSON - but after replacing
-        /// all apostrophes in the expected JSON with double quotes. This basically makes the tests easier
-        /// to read.
-        /// </summary>
-        private static void AssertJson(string expectedJsonWithApostrophes, string actualJson)
-        {
-            var expectedJson = expectedJsonWithApostrophes.Replace("'", "\"");
-            Assert.AreEqual(expectedJson, actualJson);
-        }
-    }
-}
+#region Copyright notice and license

+// Protocol Buffers - Google's data interchange format

+// Copyright 2008 Google Inc.  All rights reserved.

+// https://developers.google.com/protocol-buffers/

+//

+// Redistribution and use in source and binary forms, with or without

+// modification, are permitted provided that the following conditions are

+// met:

+//

+//     * Redistributions of source code must retain the above copyright

+// notice, this list of conditions and the following disclaimer.

+//     * Redistributions in binary form must reproduce the above

+// copyright notice, this list of conditions and the following disclaimer

+// in the documentation and/or other materials provided with the

+// distribution.

+//     * Neither the name of Google Inc. nor the names of its

+// contributors may be used to endorse or promote products derived from

+// this software without specific prior written permission.

+//

+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

+#endregion

+

+using System;

+using Google.Protobuf.TestProtos;

+using NUnit.Framework;

+using UnitTest.Issues.TestProtos;

+using Google.Protobuf.WellKnownTypes;

+using Google.Protobuf.Reflection;

+

+using static Google.Protobuf.JsonParserTest; // For WrapInQuotes

+using System.IO;

+using Google.Protobuf.Collections;

+using ProtobufUnittest;

+

+namespace Google.Protobuf

+{

+    /// <summary>

+    /// Tests for the JSON formatter. Note that in these tests, double quotes are replaced with apostrophes

+    /// for the sake of readability (embedding \" everywhere is painful). See the AssertJson method for details.

+    /// </summary>

+    public class JsonFormatterTest

+    {

+        [Test]

+        public void DefaultValues_WhenOmitted()

+        {

+            var formatter = JsonFormatter.Default;

+

+            AssertJson("{ }", formatter.Format(new ForeignMessage()));

+            AssertJson("{ }", formatter.Format(new TestAllTypes()));

+            AssertJson("{ }", formatter.Format(new TestMap()));

+        }

+

+        [Test]

+        public void DefaultValues_WhenIncluded()

+        {

+            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));

+            AssertJson("{ 'c': 0 }", formatter.Format(new ForeignMessage()));

+        }

+

+        [Test]

+        public void EnumAllowAlias()

+        {

+            var message = new TestEnumAllowAlias

+            {

+                Value = TestEnumWithDupValue.Foo2,

+            };

+            var actualText = JsonFormatter.Default.Format(message);

+            var expectedText = "{ 'value': 'FOO1' }";

+            AssertJson(expectedText, actualText);

+        }

+

+        [Test]

+        public void EnumAsInt()

+        {

+            var message = new TestAllTypes

+            {

+                SingleForeignEnum = ForeignEnum.ForeignBar,

+                RepeatedForeignEnum = { ForeignEnum.ForeignBaz, (ForeignEnum) 100, ForeignEnum.ForeignFoo }

+            };

+            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatEnumsAsIntegers(true));

+            var actualText = formatter.Format(message);

+            var expectedText = "{ " +

+                               "'singleForeignEnum': 5, " +

+                               "'repeatedForeignEnum': [ 6, 100, 4 ]" +

+                               " }";

+            AssertJson(expectedText, actualText);

+        }

+

+        [Test]

+        public void AllSingleFields()

+        {

+            var message = new TestAllTypes

+            {

+                SingleBool = true,

+                SingleBytes = ByteString.CopyFrom(1, 2, 3, 4),

+                SingleDouble = 23.5,

+                SingleFixed32 = 23,

+                SingleFixed64 = 1234567890123,

+                SingleFloat = 12.25f,

+                SingleForeignEnum = ForeignEnum.ForeignBar,

+                SingleForeignMessage = new ForeignMessage { C = 10 },

+                SingleImportEnum = ImportEnum.ImportBaz,

+                SingleImportMessage = new ImportMessage { D = 20 },

+                SingleInt32 = 100,

+                SingleInt64 = 3210987654321,

+                SingleNestedEnum = TestAllTypes.Types.NestedEnum.Foo,

+                SingleNestedMessage = new TestAllTypes.Types.NestedMessage { Bb = 35 },

+                SinglePublicImportMessage = new PublicImportMessage { E = 54 },

+                SingleSfixed32 = -123,

+                SingleSfixed64 = -12345678901234,

+                SingleSint32 = -456,

+                SingleSint64 = -12345678901235,

+                SingleString = "test\twith\ttabs",

+                SingleUint32 = uint.MaxValue,

+                SingleUint64 = ulong.MaxValue,

+            };

+            var actualText = JsonFormatter.Default.Format(message);

+

+            // Fields in numeric order

+            var expectedText = "{ " +

+                "'singleInt32': 100, " +

+                "'singleInt64': '3210987654321', " +

+                "'singleUint32': 4294967295, " +

+                "'singleUint64': '18446744073709551615', " +

+                "'singleSint32': -456, " +

+                "'singleSint64': '-12345678901235', " +

+                "'singleFixed32': 23, " +

+                "'singleFixed64': '1234567890123', " +

+                "'singleSfixed32': -123, " +

+                "'singleSfixed64': '-12345678901234', " +

+                "'singleFloat': 12.25, " +

+                "'singleDouble': 23.5, " +

+                "'singleBool': true, " +

+                "'singleString': 'test\\twith\\ttabs', " +

+                "'singleBytes': 'AQIDBA==', " +

+                "'singleNestedMessage': { 'bb': 35 }, " +

+                "'singleForeignMessage': { 'c': 10 }, " +

+                "'singleImportMessage': { 'd': 20 }, " +

+                "'singleNestedEnum': 'FOO', " +

+                "'singleForeignEnum': 'FOREIGN_BAR', " +

+                "'singleImportEnum': 'IMPORT_BAZ', " +

+                "'singlePublicImportMessage': { 'e': 54 }" +

+                " }";

+            AssertJson(expectedText, actualText);

+        }

+

+        [Test]

+        public void WithFormatDefaultValues_DoesNotAffectMessageFields()

+        {

+            var message = new TestAllTypes();

+            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));

+            var json = formatter.Format(message);

+            Assert.IsFalse(json.Contains("\"singleNestedMessage\""));

+            Assert.IsFalse(json.Contains("\"singleForeignMessage\""));

+            Assert.IsFalse(json.Contains("\"singleImportMessage\""));

+        }

+

+        [Test]

+        public void WithFormatDefaultValues_DoesNotAffectProto3OptionalFields()

+        {

+            var message = new TestProto3Optional();

+            message.OptionalInt32 = 0;

+            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));

+            var json = formatter.Format(message);

+            // The non-optional proto3 fields are formatted, as is the optional-but-specified field.

+            AssertJson("{ 'optionalInt32': 0, 'singularInt32': 0, 'singularInt64': '0' }", json);

+        }

+

+        [Test]

+        public void WithFormatDefaultValues_DoesNotAffectProto2Fields()

+        {

+            var message = new TestProtos.Proto2.ForeignMessage();

+            message.C = 0;

+            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));

+            var json = formatter.Format(message);

+            // The specified field is formatted, but the non-specified field (d) is not.

+            AssertJson("{ 'c': 0 }", json);

+        }

+

+        [Test]

+        public void WithFormatDefaultValues_DoesNotAffectOneofFields()

+        {

+            var message = new TestOneof();

+            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));

+            var json = formatter.Format(message);

+            AssertJson("{ }", json);

+        }

+

+        [Test]

+        public void RepeatedField()

+        {

+            AssertJson("{ 'repeatedInt32': [ 1, 2, 3, 4, 5 ] }",

+                JsonFormatter.Default.Format(new TestAllTypes { RepeatedInt32 = { 1, 2, 3, 4, 5 } }));

+        }

+

+        [Test]

+        public void MapField_StringString()

+        {

+            AssertJson("{ 'mapStringString': { 'with spaces': 'bar', 'a': 'b' } }",

+                JsonFormatter.Default.Format(new TestMap { MapStringString = { { "with spaces", "bar" }, { "a", "b" } } }));

+        }

+

+        [Test]

+        public void MapField_Int32Int32()

+        {

+            // The keys are quoted, but the values aren't.

+            AssertJson("{ 'mapInt32Int32': { '0': 1, '2': 3 } }",

+                JsonFormatter.Default.Format(new TestMap { MapInt32Int32 = { { 0, 1 }, { 2, 3 } } }));

+        }

+

+        [Test]

+        public void MapField_BoolBool()

+        {

+            // The keys are quoted, but the values aren't.

+            AssertJson("{ 'mapBoolBool': { 'false': true, 'true': false } }",

+                JsonFormatter.Default.Format(new TestMap { MapBoolBool = { { false, true }, { true, false } } }));

+        }

+

+        [Test]

+        public void NullValueOutsideStruct()

+        {

+            var message = new NullValueOutsideStruct { NullValue = NullValue.NullValue };

+            AssertJson("{ 'nullValue': null }", JsonFormatter.Default.Format(message));

+        }

+

+        [Test]

+        public void NullValueNotInOneof()

+        {

+            var message = new NullValueNotInOneof();

+            AssertJson("{ }", JsonFormatter.Default.Format(message));

+        }

+

+        [Test]

+        public void NullValueNotInOneof_FormatDefaults()

+        {

+            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));

+            var message = new NullValueNotInOneof();

+            AssertJson("{ 'nullValue': null }", formatter.Format(message));

+        }

+

+        [TestCase(1.0, "1")]

+        [TestCase(double.NaN, "'NaN'")]

+        [TestCase(double.PositiveInfinity, "'Infinity'")]

+        [TestCase(double.NegativeInfinity, "'-Infinity'")]

+        public void DoubleRepresentations(double value, string expectedValueText)

+        {

+            var message = new TestAllTypes { SingleDouble = value };

+            string actualText = JsonFormatter.Default.Format(message);

+            string expectedText = "{ 'singleDouble': " + expectedValueText + " }";

+            AssertJson(expectedText, actualText);

+        }

+

+        [Test]

+        public void UnknownEnumValueNumeric_SingleField()

+        {

+            var message = new TestAllTypes { SingleForeignEnum = (ForeignEnum) 100 };

+            AssertJson("{ 'singleForeignEnum': 100 }", JsonFormatter.Default.Format(message));

+        }

+

+        [Test]

+        public void UnknownEnumValueNumeric_RepeatedField()

+        {

+            var message = new TestAllTypes { RepeatedForeignEnum = { ForeignEnum.ForeignBaz, (ForeignEnum) 100, ForeignEnum.ForeignFoo } };

+            AssertJson("{ 'repeatedForeignEnum': [ 'FOREIGN_BAZ', 100, 'FOREIGN_FOO' ] }", JsonFormatter.Default.Format(message));

+        }

+

+        [Test]

+        public void UnknownEnumValueNumeric_MapField()

+        {

+            var message = new TestMap { MapInt32Enum = { { 1, MapEnum.Foo }, { 2, (MapEnum) 100 }, { 3, MapEnum.Bar } } };

+            AssertJson("{ 'mapInt32Enum': { '1': 'MAP_ENUM_FOO', '2': 100, '3': 'MAP_ENUM_BAR' } }", JsonFormatter.Default.Format(message));

+        }

+

+        [Test]

+        public void UnknownEnumValue_RepeatedField_AllEntriesUnknown()

+        {

+            var message = new TestAllTypes { RepeatedForeignEnum = { (ForeignEnum) 200, (ForeignEnum) 100 } };

+            AssertJson("{ 'repeatedForeignEnum': [ 200, 100 ] }", JsonFormatter.Default.Format(message));

+        }

+

+        [Test]

+        [TestCase("a\u17b4b", "a\\u17b4b")] // Explicit

+        [TestCase("a\u0601b", "a\\u0601b")] // Ranged

+        [TestCase("a\u0605b", "a\u0605b")] // Passthrough (note lack of double backslash...)

+        public void SimpleNonAscii(string text, string encoded)

+        {

+            var message = new TestAllTypes { SingleString = text };

+            AssertJson("{ 'singleString': '" + encoded + "' }", JsonFormatter.Default.Format(message));

+        }

+

+        [Test]

+        public void SurrogatePairEscaping()

+        {

+            var message = new TestAllTypes { SingleString = "a\uD801\uDC01b" };

+            AssertJson("{ 'singleString': 'a\\ud801\\udc01b' }", JsonFormatter.Default.Format(message));

+        }

+

+        [Test]

+        public void InvalidSurrogatePairsFail()

+        {

+            // Note: don't use TestCase for these, as the strings can't be reliably represented

+            // See http://codeblog.jonskeet.uk/2014/11/07/when-is-a-string-not-a-string/

+

+            // Lone low surrogate

+            var message = new TestAllTypes { SingleString = "a\uDC01b" };

+            Assert.Throws<ArgumentException>(() => JsonFormatter.Default.Format(message));

+

+            // Lone high surrogate

+            message = new TestAllTypes { SingleString = "a\uD801b" };

+            Assert.Throws<ArgumentException>(() => JsonFormatter.Default.Format(message));

+        }

+

+        [Test]

+        [TestCase("foo_bar", "fooBar")]

+        [TestCase("bananaBanana", "bananaBanana")]

+        [TestCase("BANANABanana", "BANANABanana")]

+        [TestCase("simple", "simple")]

+        [TestCase("ACTION_AND_ADVENTURE", "ACTIONANDADVENTURE")]

+        [TestCase("action_and_adventure", "actionAndAdventure")]

+        [TestCase("kFoo", "kFoo")]

+        [TestCase("HTTPServer", "HTTPServer")]

+        [TestCase("CLIENT", "CLIENT")]

+        public void ToJsonName(string original, string expected)

+        {

+            Assert.AreEqual(expected, JsonFormatter.ToJsonName(original));

+        }

+

+        [Test]

+        [TestCase(null, "{ }")]

+        [TestCase("x", "{ 'fooString': 'x' }")]

+        [TestCase("", "{ 'fooString': '' }")]

+        public void Oneof(string fooStringValue, string expectedJson)

+        {

+            var message = new TestOneof();

+            if (fooStringValue != null)

+            {

+                message.FooString = fooStringValue;

+            }

+

+            // We should get the same result both with and without "format default values".

+            var formatter = JsonFormatter.Default;

+            AssertJson(expectedJson, formatter.Format(message));

+            formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));

+            AssertJson(expectedJson, formatter.Format(message));

+        }

+

+        [Test]

+        public void WrapperFormatting_Single()

+        {

+            // Just a few examples, handling both classes and value types, and

+            // default vs non-default values

+            var message = new TestWellKnownTypes

+            {

+                Int64Field = 10,

+                Int32Field = 0,

+                BytesField = ByteString.FromBase64("ABCD"),

+                StringField = ""

+            };

+            var expectedJson = "{ 'int64Field': '10', 'int32Field': 0, 'stringField': '', 'bytesField': 'ABCD' }";

+            AssertJson(expectedJson, JsonFormatter.Default.Format(message));

+        }

+

+        [Test]

+        public void WrapperFormatting_Message()

+        {

+            Assert.AreEqual("\"\"", JsonFormatter.Default.Format(new StringValue()));

+            Assert.AreEqual("0", JsonFormatter.Default.Format(new Int32Value()));

+        }

+

+        [Test]

+        public void WrapperFormatting_FormatDefaultValuesDoesNotFormatNull()

+        {

+            // The actual JSON here is very large because there are lots of fields. Just test a couple of them.

+            var message = new TestWellKnownTypes { Int32Field = 10 };

+            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));

+            var actualJson = formatter.Format(message);

+            // This *used* to include "int64Field": null, but that was a bug.

+            // WithDefaultValues should not affect message fields, including wrapper types.

+            Assert.IsFalse(actualJson.Contains("\"int64Field\": null"));

+            Assert.IsTrue(actualJson.Contains("\"int32Field\": 10"));

+        }

+

+        [Test]

+        public void OutputIsInNumericFieldOrder_NoDefaults()

+        {

+            var formatter = JsonFormatter.Default;

+            var message = new TestJsonFieldOrdering { PlainString = "p1", PlainInt32 = 2 };

+            AssertJson("{ 'plainString': 'p1', 'plainInt32': 2 }", formatter.Format(message));

+            message = new TestJsonFieldOrdering { O1Int32 = 5, O2String = "o2", PlainInt32 = 10, PlainString = "plain" };

+            AssertJson("{ 'plainString': 'plain', 'o2String': 'o2', 'plainInt32': 10, 'o1Int32': 5 }", formatter.Format(message));

+            message = new TestJsonFieldOrdering { O1String = "", O2Int32 = 0, PlainInt32 = 10, PlainString = "plain" };

+            AssertJson("{ 'plainString': 'plain', 'o1String': '', 'plainInt32': 10, 'o2Int32': 0 }", formatter.Format(message));

+        }

+

+        [Test]

+        public void OutputIsInNumericFieldOrder_WithDefaults()

+        {

+            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithFormatDefaultValues(true));

+            var message = new TestJsonFieldOrdering();

+            AssertJson("{ 'plainString': '', 'plainInt32': 0 }", formatter.Format(message));

+            message = new TestJsonFieldOrdering { O1Int32 = 5, O2String = "o2", PlainInt32 = 10, PlainString = "plain" };

+            AssertJson("{ 'plainString': 'plain', 'o2String': 'o2', 'plainInt32': 10, 'o1Int32': 5 }", formatter.Format(message));

+            message = new TestJsonFieldOrdering { O1String = "", O2Int32 = 0, PlainInt32 = 10, PlainString = "plain" };

+            AssertJson("{ 'plainString': 'plain', 'o1String': '', 'plainInt32': 10, 'o2Int32': 0 }", formatter.Format(message));

+        }

+

+        [Test]

+        [TestCase("1970-01-01T00:00:00Z", 0)]

+        [TestCase("1970-01-01T00:00:00.000000001Z", 1)]

+        [TestCase("1970-01-01T00:00:00.000000010Z", 10)]

+        [TestCase("1970-01-01T00:00:00.000000100Z", 100)]

+        [TestCase("1970-01-01T00:00:00.000001Z", 1000)]

+        [TestCase("1970-01-01T00:00:00.000010Z", 10000)]

+        [TestCase("1970-01-01T00:00:00.000100Z", 100000)]

+        [TestCase("1970-01-01T00:00:00.001Z", 1000000)]

+        [TestCase("1970-01-01T00:00:00.010Z", 10000000)]

+        [TestCase("1970-01-01T00:00:00.100Z", 100000000)]

+        [TestCase("1970-01-01T00:00:00.120Z", 120000000)]

+        [TestCase("1970-01-01T00:00:00.123Z", 123000000)]

+        [TestCase("1970-01-01T00:00:00.123400Z", 123400000)]

+        [TestCase("1970-01-01T00:00:00.123450Z", 123450000)]

+        [TestCase("1970-01-01T00:00:00.123456Z", 123456000)]

+        [TestCase("1970-01-01T00:00:00.123456700Z", 123456700)]

+        [TestCase("1970-01-01T00:00:00.123456780Z", 123456780)]

+        [TestCase("1970-01-01T00:00:00.123456789Z", 123456789)]

+        public void TimestampStandalone(string expected, int nanos)

+        {

+            Assert.AreEqual(WrapInQuotes(expected), new Timestamp { Nanos = nanos }.ToString());

+        }

+

+        [Test]

+        public void TimestampStandalone_FromDateTime()

+        {

+            // One before and one after the Unix epoch, more easily represented via DateTime.

+            Assert.AreEqual("\"1673-06-19T12:34:56Z\"",

+                new DateTime(1673, 6, 19, 12, 34, 56, DateTimeKind.Utc).ToTimestamp().ToString());

+            Assert.AreEqual("\"2015-07-31T10:29:34Z\"",

+                new DateTime(2015, 7, 31, 10, 29, 34, DateTimeKind.Utc).ToTimestamp().ToString());

+        }

+

+        [Test]

+        [TestCase(-1, -1)] // Would be valid as duration

+        [TestCase(1, Timestamp.MaxNanos + 1)]

+        [TestCase(Timestamp.UnixSecondsAtBclMaxValue + 1, 0)]

+        [TestCase(Timestamp.UnixSecondsAtBclMinValue - 1, 0)]

+        public void TimestampStandalone_NonNormalized(long seconds, int nanoseconds)

+        {

+            var timestamp = new Timestamp { Seconds = seconds, Nanos = nanoseconds };

+            Assert.Throws<InvalidOperationException>(() => JsonFormatter.Default.Format(timestamp));

+        }

+

+        [Test]

+        public void TimestampField()

+        {

+            var message = new TestWellKnownTypes { TimestampField = new Timestamp() };

+            AssertJson("{ 'timestampField': '1970-01-01T00:00:00Z' }", JsonFormatter.Default.Format(message));

+        }

+

+        [Test]

+        [TestCase(0, 0, "0s")]

+        [TestCase(1, 0, "1s")]

+        [TestCase(-1, 0, "-1s")]

+        [TestCase(0, 1, "0.000000001s")]

+        [TestCase(0, 10, "0.000000010s")]

+        [TestCase(0, 100, "0.000000100s")]

+        [TestCase(0, 1000, "0.000001s")]

+        [TestCase(0, 10000, "0.000010s")]

+        [TestCase(0, 100000, "0.000100s")]

+        [TestCase(0, 1000000, "0.001s")]

+        [TestCase(0, 10000000, "0.010s")]

+        [TestCase(0, 100000000, "0.100s")]

+        [TestCase(0, 120000000, "0.120s")]

+        [TestCase(0, 123000000, "0.123s")]

+        [TestCase(0, 123400000, "0.123400s")]

+        [TestCase(0, 123450000, "0.123450s")]

+        [TestCase(0, 123456000, "0.123456s")]

+        [TestCase(0, 123456700, "0.123456700s")]

+        [TestCase(0, 123456780, "0.123456780s")]

+        [TestCase(0, 123456789, "0.123456789s")]

+        [TestCase(0, -100000000, "-0.100s")]

+        [TestCase(1, 100000000, "1.100s")]

+        [TestCase(-1, -100000000, "-1.100s")]

+        public void DurationStandalone(long seconds, int nanoseconds, string expected)

+        {

+            var json = JsonFormatter.Default.Format(new Duration { Seconds = seconds, Nanos = nanoseconds });

+            Assert.AreEqual(WrapInQuotes(expected), json);

+        }

+

+        [Test]

+        [TestCase(1, 2123456789)]

+        [TestCase(1, -100000000)]

+        public void DurationStandalone_NonNormalized(long seconds, int nanoseconds)

+        {

+            var duration = new Duration { Seconds = seconds, Nanos = nanoseconds };

+            Assert.Throws<InvalidOperationException>(() => JsonFormatter.Default.Format(duration));

+        }

+

+        [Test]

+        public void DurationField()

+        {

+            var message = new TestWellKnownTypes { DurationField = new Duration() };

+            AssertJson("{ 'durationField': '0s' }", JsonFormatter.Default.Format(message));

+        }

+

+        [Test]

+        public void StructSample()

+        {

+            var message = new Struct

+            {

+                Fields =

+                {

+                    { "a", Value.ForNull() },

+                    { "b", Value.ForBool(false) },

+                    { "c", Value.ForNumber(10.5) },

+                    { "d", Value.ForString("text") },

+                    { "e", Value.ForList(Value.ForString("t1"), Value.ForNumber(5)) },

+                    { "f", Value.ForStruct(new Struct { Fields = { { "nested", Value.ForString("value") } } }) }

+                }

+            };

+            AssertJson("{ 'a': null, 'b': false, 'c': 10.5, 'd': 'text', 'e': [ 't1', 5 ], 'f': { 'nested': 'value' } }", message.ToString());

+        }

+

+        [Test]

+        [TestCase("foo__bar")]

+        [TestCase("foo_3_ar")]

+        [TestCase("fooBar")]

+        public void FieldMaskInvalid(string input)

+        {

+            var mask = new FieldMask { Paths = { input } };

+            Assert.Throws<InvalidOperationException>(() => JsonFormatter.Default.Format(mask));

+        }

+

+        [Test]

+        public void FieldMaskStandalone()

+        {

+            var fieldMask = new FieldMask { Paths = { "", "single", "with_underscore", "nested.field.name", "nested..double_dot" } };

+            Assert.AreEqual("\",single,withUnderscore,nested.field.name,nested..doubleDot\"", fieldMask.ToString());

+

+            // Invalid, but we shouldn't create broken JSON...

+            fieldMask = new FieldMask { Paths = { "x\\y" } };

+            Assert.AreEqual(@"""x\\y""", fieldMask.ToString());

+        }

+

+        [Test]

+        public void FieldMaskField()

+        {

+            var message = new TestWellKnownTypes { FieldMaskField = new FieldMask { Paths = { "user.display_name", "photo" } } };

+            AssertJson("{ 'fieldMaskField': 'user.displayName,photo' }", JsonFormatter.Default.Format(message));

+        }

+

+        // SourceContext is an example of a well-known type with no special JSON handling

+        [Test]

+        public void SourceContextStandalone()

+        {

+            var message = new SourceContext { FileName = "foo.proto" };

+            AssertJson("{ 'fileName': 'foo.proto' }", JsonFormatter.Default.Format(message));

+        }

+

+        [Test]

+        public void AnyWellKnownType()

+        {

+            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithTypeRegistry(TypeRegistry.FromMessages(Timestamp.Descriptor)));

+            var timestamp = new DateTime(1673, 6, 19, 12, 34, 56, DateTimeKind.Utc).ToTimestamp();

+            var any = Any.Pack(timestamp);

+            AssertJson("{ '@type': 'type.googleapis.com/google.protobuf.Timestamp', 'value': '1673-06-19T12:34:56Z' }", formatter.Format(any));

+        }

+

+        [Test]

+        public void AnyMessageType()

+        {

+            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithTypeRegistry(TypeRegistry.FromMessages(TestAllTypes.Descriptor)));

+            var message = new TestAllTypes { SingleInt32 = 10, SingleNestedMessage = new TestAllTypes.Types.NestedMessage { Bb = 20 } };

+            var any = Any.Pack(message);

+            AssertJson("{ '@type': 'type.googleapis.com/protobuf_unittest3.TestAllTypes', 'singleInt32': 10, 'singleNestedMessage': { 'bb': 20 } }", formatter.Format(any));

+        }

+

+        [Test]

+        public void AnyMessageType_CustomPrefix()

+        {

+            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithTypeRegistry(TypeRegistry.FromMessages(TestAllTypes.Descriptor)));

+            var message = new TestAllTypes { SingleInt32 = 10 };

+            var any = Any.Pack(message, "foo.bar/baz");

+            AssertJson("{ '@type': 'foo.bar/baz/protobuf_unittest3.TestAllTypes', 'singleInt32': 10 }", formatter.Format(any));

+        }

+

+        [Test]

+        public void AnyNested()

+        {

+            var registry = TypeRegistry.FromMessages(TestWellKnownTypes.Descriptor, TestAllTypes.Descriptor);

+            var formatter = new JsonFormatter(JsonFormatter.Settings.Default.WithTypeRegistry(registry));

+

+            // Nest an Any as the value of an Any.

+            var doubleNestedMessage = new TestAllTypes { SingleInt32 = 20 };

+            var nestedMessage = Any.Pack(doubleNestedMessage);

+            var message = new TestWellKnownTypes { AnyField = Any.Pack(nestedMessage) };

+            AssertJson("{ 'anyField': { '@type': 'type.googleapis.com/google.protobuf.Any', 'value': { '@type': 'type.googleapis.com/protobuf_unittest3.TestAllTypes', 'singleInt32': 20 } } }",

+                formatter.Format(message));

+        }

+

+        [Test]

+        public void AnyUnknownType()

+        {

+            // The default type registry doesn't have any types in it.

+            var message = new TestAllTypes();

+            var any = Any.Pack(message);

+            Assert.Throws<InvalidOperationException>(() => JsonFormatter.Default.Format(any));

+        }

+

+        [Test]

+        [TestCase(typeof(BoolValue), true, "true")]

+        [TestCase(typeof(Int32Value), 32, "32")]

+        [TestCase(typeof(Int64Value), 32L, "\"32\"")]

+        [TestCase(typeof(UInt32Value), 32U, "32")]

+        [TestCase(typeof(UInt64Value), 32UL, "\"32\"")]

+        [TestCase(typeof(StringValue), "foo", "\"foo\"")]

+        [TestCase(typeof(FloatValue), 1.5f, "1.5")]

+        [TestCase(typeof(DoubleValue), 1.5d, "1.5")]

+        public void Wrappers_Standalone(System.Type wrapperType, object value, string expectedJson)

+        {

+            IMessage populated = (IMessage)Activator.CreateInstance(wrapperType);

+            populated.Descriptor.Fields[WrappersReflection.WrapperValueFieldNumber].Accessor.SetValue(populated, value);

+            Assert.AreEqual(expectedJson, JsonFormatter.Default.Format(populated));

+        }

+

+        // Sanity tests for WriteValue. Not particularly comprehensive, as it's all covered above already,

+        // as FormatMessage uses WriteValue.

+

+        [TestCase(null, "null")]

+        [TestCase(1, "1")]

+        [TestCase(1L, "'1'")]

+        [TestCase(0.5f, "0.5")]

+        [TestCase(0.5d, "0.5")]

+        [TestCase("text", "'text'")]

+        [TestCase("x\ny", @"'x\ny'")]

+        [TestCase(ForeignEnum.ForeignBar, "'FOREIGN_BAR'")]

+        public void WriteValue_Constant(object value, string expectedJson)

+        {

+            AssertWriteValue(value, expectedJson);

+        }

+

+        [Test]

+        public void WriteValue_Timestamp()

+        {

+            var value = new DateTime(1673, 6, 19, 12, 34, 56, DateTimeKind.Utc).ToTimestamp();

+            AssertWriteValue(value, "'1673-06-19T12:34:56Z'");

+        }

+

+        [Test]

+        public void WriteValue_Message()

+        {

+            var value = new TestAllTypes { SingleInt32 = 100, SingleInt64 = 3210987654321L };

+            AssertWriteValue(value, "{ 'singleInt32': 100, 'singleInt64': '3210987654321' }");

+        }

+

+        [Test]

+        public void WriteValue_Message_PreserveNames()

+        {

+            var value = new TestAllTypes { SingleInt32 = 100, SingleInt64 = 3210987654321L };

+            AssertWriteValue(value, "{ 'single_int32': 100, 'single_int64': '3210987654321' }", JsonFormatter.Settings.Default.WithPreserveProtoFieldNames(true));

+        }

+

+        [Test]

+        public void WriteValue_List()

+        {

+            var value = new RepeatedField<int> { 1, 2, 3 };

+            AssertWriteValue(value, "[ 1, 2, 3 ]");

+        }

+

+        [Test]

+        public void Proto2_DefaultValuesWritten()

+        {

+            var value = new ProtobufTestMessages.Proto2.TestAllTypesProto2() { FieldName13 = 0 };

+            AssertWriteValue(value, "{ 'FieldName13': 0 }");

+        }

+

+        private static void AssertWriteValue(object value, string expectedJson, JsonFormatter.Settings settings = null)

+        {

+            var writer = new StringWriter();

+            new JsonFormatter(settings ?? JsonFormatter.Settings.Default).WriteValue(writer, value);

+            string actual = writer.ToString();

+            AssertJson(expectedJson, actual);

+        }

+

+        /// <summary>

+        /// Checks that the actual JSON is the same as the expected JSON - but after replacing

+        /// all apostrophes in the expected JSON with double quotes. This basically makes the tests easier

+        /// to read.

+        /// </summary>

+        private static void AssertJson(string expectedJsonWithApostrophes, string actualJson)

+        {

+            var expectedJson = expectedJsonWithApostrophes.Replace("'", "\"");

+            Assert.AreEqual(expectedJson, actualJson);

+        }

+    }

+}

diff --git a/csharp/src/Google.Protobuf/JsonFormatter.cs b/csharp/src/Google.Protobuf/JsonFormatter.cs
index 17fdc7f..db7dc5c 100644
--- a/csharp/src/Google.Protobuf/JsonFormatter.cs
+++ b/csharp/src/Google.Protobuf/JsonFormatter.cs
@@ -233,7 +233,14 @@
                     writer.Write(PropertySeparator);
                 }
 
-                WriteString(writer, accessor.Descriptor.JsonName);
+                if (settings.PreserveProtoFieldNames)

+                {

+                    WriteString(writer, accessor.Descriptor.Name);

+                }
+                else

+                {

+                    WriteString(writer, accessor.Descriptor.JsonName);

+                }
                 writer.Write(NameValueSeparator);
                 WriteValue(writer, value);
 
@@ -816,6 +823,11 @@
             /// </summary>
             public bool FormatEnumsAsIntegers { get; }
 
+            /// <summary>

+            /// Whether to use the original proto field names as defined in the .proto file. Defaults to false.

+            /// </summary>
+            public bool PreserveProtoFieldNames { get; }
+
 
             /// <summary>
             /// Creates a new <see cref="Settings"/> object with the specified formatting of default values
@@ -832,7 +844,7 @@
             /// </summary>
             /// <param name="formatDefaultValues"><c>true</c> if default values (0, empty strings etc) should be formatted; <c>false</c> otherwise.</param>
             /// <param name="typeRegistry">The <see cref="TypeRegistry"/> to use when formatting <see cref="Any"/> messages.</param>
-            public Settings(bool formatDefaultValues, TypeRegistry typeRegistry) : this(formatDefaultValues, typeRegistry, false)
+            public Settings(bool formatDefaultValues, TypeRegistry typeRegistry) : this(formatDefaultValues, typeRegistry, false, false)
             {
             }
 
@@ -842,32 +854,41 @@
             /// <param name="formatDefaultValues"><c>true</c> if default values (0, empty strings etc) should be formatted; <c>false</c> otherwise.</param>
             /// <param name="typeRegistry">The <see cref="TypeRegistry"/> to use when formatting <see cref="Any"/> messages. TypeRegistry.Empty will be used if it is null.</param>
             /// <param name="formatEnumsAsIntegers"><c>true</c> to format the enums as integers; <c>false</c> to format enums as enum names.</param>
+            /// <param name="preserveProtoFieldNames"><c>true</c> to preserve proto field names; <c>false</c> to convert them to lowerCamelCase.</param>
             private Settings(bool formatDefaultValues,
                             TypeRegistry typeRegistry,
-                            bool formatEnumsAsIntegers)
+                            bool formatEnumsAsIntegers,
+                            bool preserveProtoFieldNames)
             {
                 FormatDefaultValues = formatDefaultValues;
                 TypeRegistry = typeRegistry ?? TypeRegistry.Empty;
                 FormatEnumsAsIntegers = formatEnumsAsIntegers;
+                PreserveProtoFieldNames = preserveProtoFieldNames;
             }
 
             /// <summary>
             /// Creates a new <see cref="Settings"/> object with the specified formatting of default values and the current settings.
             /// </summary>
             /// <param name="formatDefaultValues"><c>true</c> if default values (0, empty strings etc) should be formatted; <c>false</c> otherwise.</param>
-            public Settings WithFormatDefaultValues(bool formatDefaultValues) => new Settings(formatDefaultValues, TypeRegistry, FormatEnumsAsIntegers);
+            public Settings WithFormatDefaultValues(bool formatDefaultValues) => new Settings(formatDefaultValues, TypeRegistry, FormatEnumsAsIntegers, PreserveProtoFieldNames);
 
             /// <summary>
             /// Creates a new <see cref="Settings"/> object with the specified type registry and the current settings.
             /// </summary>
             /// <param name="typeRegistry">The <see cref="TypeRegistry"/> to use when formatting <see cref="Any"/> messages.</param>
-            public Settings WithTypeRegistry(TypeRegistry typeRegistry) => new Settings(FormatDefaultValues, typeRegistry, FormatEnumsAsIntegers);
+            public Settings WithTypeRegistry(TypeRegistry typeRegistry) => new Settings(FormatDefaultValues, typeRegistry, FormatEnumsAsIntegers, PreserveProtoFieldNames);
 
             /// <summary>
             /// Creates a new <see cref="Settings"/> object with the specified enums formatting option and the current settings.
             /// </summary>
             /// <param name="formatEnumsAsIntegers"><c>true</c> to format the enums as integers; <c>false</c> to format enums as enum names.</param>
-            public Settings WithFormatEnumsAsIntegers(bool formatEnumsAsIntegers) => new Settings(FormatDefaultValues, TypeRegistry, formatEnumsAsIntegers);
+            public Settings WithFormatEnumsAsIntegers(bool formatEnumsAsIntegers) => new Settings(FormatDefaultValues, TypeRegistry, formatEnumsAsIntegers, PreserveProtoFieldNames);
+
+            /// <summary>

+            /// Creates a new <see cref="Settings"/> object with the specified field name formatting option and the current settings.

+            /// </summary>

+            /// <param name="preserveProtoFieldNames"><c>true</c> to preserve proto field names; <c>false</c> to convert them to lowerCamelCase.</param>
+            public Settings WithPreserveProtoFieldNames(bool preserveProtoFieldNames) => new Settings(FormatDefaultValues, TypeRegistry, FormatEnumsAsIntegers, preserveProtoFieldNames);
         }
 
         // Effectively a cache of mapping from enum values to the original name as specified in the proto file,
diff --git a/docs/options.md b/docs/options.md
index e4ca729..dbb3563 100644
--- a/docs/options.md
+++ b/docs/options.md
@@ -300,3 +300,7 @@
 1. Protoc-gen-go-svc
    * Website: https://github.com/dane/protoc-gen-go-svc
    * Extension: 1140
+
+1. Embedded Proto
+   * Website: https://EmbeddedProto.com
+   * Extension: 1141
diff --git a/kokoro/linux/benchmark/build.sh b/kokoro/linux/benchmark/build.sh
index dee7c47..f470989 100755
--- a/kokoro/linux/benchmark/build.sh
+++ b/kokoro/linux/benchmark/build.sh
@@ -1,18 +1,18 @@
 #!/bin/bash
 #
+# This is the top-level script we give to Kokoro as the entry point for
+# running the "pull request" project:
+#
+# This script selects a specific Dockerfile (for building a Docker image) and
+# a script to run inside that image.  Then we delegate to the general
+# build_and_run_docker.sh script.
+
 # Change to repo root
 cd $(dirname $0)/../../..
 
-set -ex
-
-# Install openJDK 11 (required by the java benchmarks)
-sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 78BD65473CB3BD13
-sudo add-apt-repository ppa:openjdk-r/ppa
-sudo apt-get update
-sudo apt-get install -y openjdk-11-jdk-headless
-
-# use java 11
-sudo update-java-alternatives --set /usr/lib/jvm/java-1.11.0-openjdk-amd64
-java -version
-
-./tests.sh benchmark
+export DOCKERHUB_ORGANIZATION=protobuftesting
+export DOCKERFILE_DIR=kokoro/linux/dockerfile/test/java_stretch
+export DOCKER_RUN_SCRIPT=kokoro/linux/pull_request_in_docker.sh
+export OUTPUT_DIR=testoutput
+export TEST_SET="benchmark"
+./kokoro/linux/build_and_run_docker.sh
diff --git a/kokoro/linux/benchmark/run.sh b/kokoro/linux/benchmark/run.sh
index acd8737..963f779 100755
--- a/kokoro/linux/benchmark/run.sh
+++ b/kokoro/linux/benchmark/run.sh
@@ -23,7 +23,7 @@
 ./configure CXXFLAGS="-fPIC -O2"
 make -j8
 pushd python
-virtualenv -p python3 env
+python3 -m venv env
 source env/bin/activate
 python3 setup.py build --cpp_implementation
 pip3 install --install-option="--cpp_implementation" .
diff --git a/kokoro/linux/dockerfile/test/java_stretch/Dockerfile b/kokoro/linux/dockerfile/test/java_stretch/Dockerfile
index 7e1feea..8eeb6a2 100644
--- a/kokoro/linux/dockerfile/test/java_stretch/Dockerfile
+++ b/kokoro/linux/dockerfile/test/java_stretch/Dockerfile
@@ -11,6 +11,7 @@
   build-essential \
   bzip2 \
   ccache \
+  cmake \
   curl \
   gcc \
   git \
@@ -21,6 +22,7 @@
   libtool \
   make \
   parallel \
+  pkg-config \
   time \
   wget \
   # Java dependencies
@@ -29,6 +31,7 @@
   # Required for the gtest build.
   python2 \
   # Python dependencies
+  python3-dev \
   python3-setuptools \
   python3-pip \
   python3-venv \
diff --git a/kokoro/linux/dockerfile/test/python35/Dockerfile b/kokoro/linux/dockerfile/test/python35/Dockerfile
deleted file mode 100644
index 50ee184..0000000
--- a/kokoro/linux/dockerfile/test/python35/Dockerfile
+++ /dev/null
@@ -1,31 +0,0 @@
-FROM python:3.5-buster
-
-# Install dependencies.  We start with the basic ones require to build protoc
-# and the C++ build
-RUN apt-get update && apt-get install -y \
-  autoconf \
-  autotools-dev \
-  build-essential \
-  bzip2 \
-  ccache \
-  curl \
-  gcc \
-  git \
-  libc6 \
-  libc6-dbg \
-  libc6-dev \
-  libgtest-dev \
-  libtool \
-  make \
-  parallel \
-  time \
-  wget \
-  && apt-get clean \
-  && rm -rf /var/lib/apt/lists/*
-
-# Install Python libraries.
-RUN python -m pip install --no-cache-dir --upgrade \
-  pip \
-  setuptools \
-  tox \
-  wheel
diff --git a/kokoro/linux/dockerfile/test/python36/Dockerfile b/kokoro/linux/dockerfile/test/python36/Dockerfile
deleted file mode 100644
index 742503e..0000000
--- a/kokoro/linux/dockerfile/test/python36/Dockerfile
+++ /dev/null
@@ -1,31 +0,0 @@
-FROM python:3.6-buster
-
-# Install dependencies.  We start with the basic ones require to build protoc
-# and the C++ build
-RUN apt-get update && apt-get install -y \
-  autoconf \
-  autotools-dev \
-  build-essential \
-  bzip2 \
-  ccache \
-  curl \
-  gcc \
-  git \
-  libc6 \
-  libc6-dbg \
-  libc6-dev \
-  libgtest-dev \
-  libtool \
-  make \
-  parallel \
-  time \
-  wget \
-  && apt-get clean \
-  && rm -rf /var/lib/apt/lists/*
-
-# Install Python libraries.
-RUN python -m pip install --no-cache-dir --upgrade \
-  pip \
-  setuptools \
-  tox \
-  wheel
diff --git a/kokoro/linux/python27/build.sh b/kokoro/linux/python27/build.sh
deleted file mode 100755
index 41531a1..0000000
--- a/kokoro/linux/python27/build.sh
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/bin/bash
-#
-# This is the top-level script we give to Kokoro as the entry point for
-# running the "pull request" project:
-#
-# This script selects a specific Dockerfile (for building a Docker image) and
-# a script to run inside that image.  Then we delegate to the general
-# build_and_run_docker.sh script.
-
-# Change to repo root
-cd $(dirname $0)/../../..
-
-export DOCKERHUB_ORGANIZATION=protobuftesting
-export DOCKERFILE_DIR=kokoro/linux/dockerfile/test/python27
-export DOCKER_RUN_SCRIPT=kokoro/linux/pull_request_in_docker.sh
-export OUTPUT_DIR=testoutput
-export TEST_SET="python27"
-./kokoro/linux/build_and_run_docker.sh
diff --git a/kokoro/linux/python27/continuous.cfg b/kokoro/linux/python27/continuous.cfg
deleted file mode 100644
index dd98469..0000000
--- a/kokoro/linux/python27/continuous.cfg
+++ /dev/null
@@ -1,11 +0,0 @@
-# Config file for running tests in Kokoro
-
-# Location of the build script in repository
-build_file: "protobuf/kokoro/linux/python27/build.sh"
-timeout_mins: 120
-
-action {
-  define_artifacts {
-    regex: "**/sponge_log.xml"
-  }
-}
diff --git a/kokoro/linux/python27/presubmit.cfg b/kokoro/linux/python27/presubmit.cfg
deleted file mode 100644
index dd98469..0000000
--- a/kokoro/linux/python27/presubmit.cfg
+++ /dev/null
@@ -1,11 +0,0 @@
-# Config file for running tests in Kokoro
-
-# Location of the build script in repository
-build_file: "protobuf/kokoro/linux/python27/build.sh"
-timeout_mins: 120
-
-action {
-  define_artifacts {
-    regex: "**/sponge_log.xml"
-  }
-}
diff --git a/kokoro/linux/python27_cpp/build.sh b/kokoro/linux/python27_cpp/build.sh
deleted file mode 100755
index 1a972ee..0000000
--- a/kokoro/linux/python27_cpp/build.sh
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/bin/bash
-#
-# This is the top-level script we give to Kokoro as the entry point for
-# running the "pull request" project:
-#
-# This script selects a specific Dockerfile (for building a Docker image) and
-# a script to run inside that image.  Then we delegate to the general
-# build_and_run_docker.sh script.
-
-# Change to repo root
-cd $(dirname $0)/../../..
-
-export DOCKERHUB_ORGANIZATION=protobuftesting
-export DOCKERFILE_DIR=kokoro/linux/dockerfile/test/python27
-export DOCKER_RUN_SCRIPT=kokoro/linux/pull_request_in_docker.sh
-export OUTPUT_DIR=testoutput
-export TEST_SET="python27_cpp"
-./kokoro/linux/build_and_run_docker.sh
diff --git a/kokoro/linux/python27_cpp/continuous.cfg b/kokoro/linux/python27_cpp/continuous.cfg
deleted file mode 100644
index ace22d0..0000000
--- a/kokoro/linux/python27_cpp/continuous.cfg
+++ /dev/null
@@ -1,11 +0,0 @@
-# Config file for running tests in Kokoro
-
-# Location of the build script in repository
-build_file: "protobuf/kokoro/linux/python27_cpp/build.sh"
-timeout_mins: 120
-
-action {
-  define_artifacts {
-    regex: "**/sponge_log.xml"
-  }
-}
diff --git a/kokoro/linux/python27_cpp/presubmit.cfg b/kokoro/linux/python27_cpp/presubmit.cfg
deleted file mode 100644
index ace22d0..0000000
--- a/kokoro/linux/python27_cpp/presubmit.cfg
+++ /dev/null
@@ -1,11 +0,0 @@
-# Config file for running tests in Kokoro
-
-# Location of the build script in repository
-build_file: "protobuf/kokoro/linux/python27_cpp/build.sh"
-timeout_mins: 120
-
-action {
-  define_artifacts {
-    regex: "**/sponge_log.xml"
-  }
-}
diff --git a/kokoro/linux/python35/build.sh b/kokoro/linux/python35/build.sh
deleted file mode 100755
index 66ea03f..0000000
--- a/kokoro/linux/python35/build.sh
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/bin/bash
-#
-# This is the top-level script we give to Kokoro as the entry point for
-# running the "pull request" project:
-#
-# This script selects a specific Dockerfile (for building a Docker image) and
-# a script to run inside that image.  Then we delegate to the general
-# build_and_run_docker.sh script.
-
-# Change to repo root
-cd $(dirname $0)/../../..
-
-export DOCKERHUB_ORGANIZATION=protobuftesting
-export DOCKERFILE_DIR=kokoro/linux/dockerfile/test/python35
-export DOCKER_RUN_SCRIPT=kokoro/linux/pull_request_in_docker.sh
-export OUTPUT_DIR=testoutput
-export TEST_SET="python35"
-./kokoro/linux/build_and_run_docker.sh
diff --git a/kokoro/linux/python35/continuous.cfg b/kokoro/linux/python35/continuous.cfg
deleted file mode 100644
index 2b3e12c..0000000
--- a/kokoro/linux/python35/continuous.cfg
+++ /dev/null
@@ -1,11 +0,0 @@
-# Config file for running tests in Kokoro
-
-# Location of the build script in repository
-build_file: "protobuf/kokoro/linux/python35/build.sh"
-timeout_mins: 120
-
-action {
-  define_artifacts {
-    regex: "**/sponge_log.xml"
-  }
-}
diff --git a/kokoro/linux/python35/presubmit.cfg b/kokoro/linux/python35/presubmit.cfg
deleted file mode 100644
index 2b3e12c..0000000
--- a/kokoro/linux/python35/presubmit.cfg
+++ /dev/null
@@ -1,11 +0,0 @@
-# Config file for running tests in Kokoro
-
-# Location of the build script in repository
-build_file: "protobuf/kokoro/linux/python35/build.sh"
-timeout_mins: 120
-
-action {
-  define_artifacts {
-    regex: "**/sponge_log.xml"
-  }
-}
diff --git a/kokoro/linux/python35_cpp/build.sh b/kokoro/linux/python35_cpp/build.sh
deleted file mode 100755
index 4d0dbd4..0000000
--- a/kokoro/linux/python35_cpp/build.sh
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/bin/bash
-#
-# This is the top-level script we give to Kokoro as the entry point for
-# running the "pull request" project:
-#
-# This script selects a specific Dockerfile (for building a Docker image) and
-# a script to run inside that image.  Then we delegate to the general
-# build_and_run_docker.sh script.
-
-# Change to repo root
-cd $(dirname $0)/../../..
-
-export DOCKERHUB_ORGANIZATION=protobuftesting
-export DOCKERFILE_DIR=kokoro/linux/dockerfile/test/python35
-export DOCKER_RUN_SCRIPT=kokoro/linux/pull_request_in_docker.sh
-export OUTPUT_DIR=testoutput
-export TEST_SET="python35_cpp"
-./kokoro/linux/build_and_run_docker.sh
diff --git a/kokoro/linux/python35_cpp/continuous.cfg b/kokoro/linux/python35_cpp/continuous.cfg
deleted file mode 100644
index ad5cc86..0000000
--- a/kokoro/linux/python35_cpp/continuous.cfg
+++ /dev/null
@@ -1,11 +0,0 @@
-# Config file for running tests in Kokoro
-
-# Location of the build script in repository
-build_file: "protobuf/kokoro/linux/python35_cpp/build.sh"
-timeout_mins: 120
-
-action {
-  define_artifacts {
-    regex: "**/sponge_log.xml"
-  }
-}
diff --git a/kokoro/linux/python35_cpp/presubmit.cfg b/kokoro/linux/python35_cpp/presubmit.cfg
deleted file mode 100644
index ad5cc86..0000000
--- a/kokoro/linux/python35_cpp/presubmit.cfg
+++ /dev/null
@@ -1,11 +0,0 @@
-# Config file for running tests in Kokoro
-
-# Location of the build script in repository
-build_file: "protobuf/kokoro/linux/python35_cpp/build.sh"
-timeout_mins: 120
-
-action {
-  define_artifacts {
-    regex: "**/sponge_log.xml"
-  }
-}
diff --git a/php/src/Google/Protobuf/Internal/MapField.php b/php/src/Google/Protobuf/Internal/MapField.php
index 86463a9..d44377a 100644
--- a/php/src/Google/Protobuf/Internal/MapField.php
+++ b/php/src/Google/Protobuf/Internal/MapField.php
@@ -135,6 +135,7 @@
      * @return object The stored element at given key.
      * @throws \ErrorException Invalid type for index.
      * @throws \ErrorException Non-existing index.
+     * @todo need to add return type mixed (require update php version to 8.0)
      */
     #[\ReturnTypeWillChange]
     public function offsetGet($key)
@@ -153,6 +154,7 @@
      * @throws \ErrorException Invalid type for key.
      * @throws \ErrorException Invalid type for value.
      * @throws \ErrorException Non-existing key.
+     * @todo need to add return type void (require update php version to 7.1)
      */
     #[\ReturnTypeWillChange]
     public function offsetSet($key, $value)
@@ -212,6 +214,7 @@
      * @param object $key The key of the element to be removed.
      * @return void
      * @throws \ErrorException Invalid type for key.
+     * @todo need to add return type void (require update php version to 7.1)
      */
     #[\ReturnTypeWillChange]
     public function offsetUnset($key)
diff --git a/php/src/Google/Protobuf/Internal/MapFieldIter.php b/php/src/Google/Protobuf/Internal/MapFieldIter.php
index a3c834b..2ff6b44 100644
--- a/php/src/Google/Protobuf/Internal/MapFieldIter.php
+++ b/php/src/Google/Protobuf/Internal/MapFieldIter.php
@@ -67,6 +67,7 @@
      * Reset the status of the iterator
      *
      * @return void
+     * @todo need to add return type void (require update php version to 7.1)
      */
     #[\ReturnTypeWillChange]
     public function rewind()
@@ -78,6 +79,7 @@
      * Return the element at the current position.
      *
      * @return object The element at the current position.
+     * @todo need to add return type mixed (require update php version to 8.0)
      */
     #[\ReturnTypeWillChange]
     public function current()
@@ -89,6 +91,7 @@
      * Return the current key.
      *
      * @return object The current key.
+     * @todo need to add return type mixed (require update php version to 8.0)
      */
     #[\ReturnTypeWillChange]
     public function key()
@@ -119,6 +122,7 @@
      * Move to the next position.
      *
      * @return void
+     * @todo need to add return type void (require update php version to 7.1)
      */
     #[\ReturnTypeWillChange]
     public function next()
diff --git a/php/src/Google/Protobuf/Internal/RepeatedField.php b/php/src/Google/Protobuf/Internal/RepeatedField.php
index 704123a..cfe5140 100644
--- a/php/src/Google/Protobuf/Internal/RepeatedField.php
+++ b/php/src/Google/Protobuf/Internal/RepeatedField.php
@@ -121,6 +121,7 @@
      * @return object The stored element at given index.
      * @throws \ErrorException Invalid type for index.
      * @throws \ErrorException Non-existing index.
+     * @todo need to add return type mixed (require update php version to 8.0)
      */
     #[\ReturnTypeWillChange]
     public function offsetGet($offset)
@@ -139,6 +140,7 @@
      * @throws \ErrorException Invalid type for index.
      * @throws \ErrorException Non-existing index.
      * @throws \ErrorException Incorrect type of the element.
+     * @todo need to add return type void (require update php version to 7.1)
      */
     #[\ReturnTypeWillChange]
     public function offsetSet($offset, $value)
@@ -211,6 +213,7 @@
      * @throws \ErrorException Invalid type for index.
      * @throws \ErrorException The element to be removed is not at the end of the
      * RepeatedField.
+     * @todo need to add return type void (require update php version to 7.1)
      */
     #[\ReturnTypeWillChange]
     public function offsetUnset($offset)
diff --git a/php/src/Google/Protobuf/Internal/RepeatedFieldIter.php b/php/src/Google/Protobuf/Internal/RepeatedFieldIter.php
index 3c85869..ec99b64 100644
--- a/php/src/Google/Protobuf/Internal/RepeatedFieldIter.php
+++ b/php/src/Google/Protobuf/Internal/RepeatedFieldIter.php
@@ -70,6 +70,7 @@
      * Reset the status of the iterator
      *
      * @return void
+     * @todo need to add return type void (require update php version to 7.1)
      */
     #[\ReturnTypeWillChange]
     public function rewind()
@@ -81,6 +82,7 @@
      * Return the element at the current position.
      *
      * @return object The element at the current position.
+     * @todo need to add return type mixed (require update php version to 8.0)
      */
     #[\ReturnTypeWillChange]
     public function current()
@@ -92,6 +94,7 @@
      * Return the current position.
      *
      * @return integer The current position.
+     * @todo need to add return type mixed (require update php version to 8.0)
      */
     #[\ReturnTypeWillChange]
     public function key()
@@ -103,6 +106,7 @@
      * Move to the next position.
      *
      * @return void
+     * @todo need to add return type void (require update php version to 7.1)
      */
     #[\ReturnTypeWillChange]
     public function next()
diff --git a/ruby/ext/google/protobuf_c/convert.c b/ruby/ext/google/protobuf_c/convert.c
index 8b98aee..2b3a650 100644
--- a/ruby/ext/google/protobuf_c/convert.c
+++ b/ruby/ext/google/protobuf_c/convert.c
@@ -162,9 +162,9 @@
     }
     case kUpb_CType_String: {
       VALUE utf8 = rb_enc_from_encoding(rb_utf8_encoding());
-      if (CLASS_OF(value) == rb_cSymbol) {
+      if (rb_obj_class(value) == rb_cSymbol) {
         value = rb_funcall(value, rb_intern("to_s"), 0);
-      } else if (CLASS_OF(value) != rb_cString) {
+      } else if (rb_obj_class(value) != rb_cString) {
         rb_raise(cTypeError,
                  "Invalid argument for string field '%s' (given %s).", name,
                  rb_class2name(CLASS_OF(value)));
@@ -185,7 +185,7 @@
     }
     case kUpb_CType_Bytes: {
       VALUE bytes = rb_enc_from_encoding(rb_ascii8bit_encoding());
-      if (CLASS_OF(value) != rb_cString) {
+      if (rb_obj_class(value) != rb_cString) {
         rb_raise(cTypeError,
                  "Invalid argument for bytes field '%s' (given %s).", name,
                  rb_class2name(CLASS_OF(value)));
diff --git a/ruby/tests/basic.rb b/ruby/tests/basic.rb
index b9d1554..b74aa0f 100755
--- a/ruby/tests/basic.rb
+++ b/ruby/tests/basic.rb
@@ -644,5 +644,19 @@
       assert_equal 2, m.map_string_int32.size
       assert_equal 1, m.map_string_msg.size
     end
+
+    def test_string_with_singleton_class_enabled
+      str = 'foobar'
+      # NOTE: Accessing a singleton class of an object changes its low level class representation
+      #       as far as the C API's CLASS_OF() method concerned, exposing the issue
+      str.singleton_class
+      m = proto_module::TestMessage.new(
+        optional_string: str,
+        optional_bytes: str
+      )
+
+      assert_equal str, m.optional_string
+      assert_equal str, m.optional_bytes
+    end
   end
 end