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android / platform / external / chromite / refs/heads/upstream / . / lib / cros_test_lib.py
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# Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Cros unit test library, with utility functions."""
from __future__ import print_function
import collections
import contextlib
import cookielib
import cStringIO
import datetime
import exceptions
import functools
import hashlib
import json
import mock
import mox
import netrc
import os
import re
import socket
import stat
import sys
import time
import unittest
import urllib
from chromite.cbuildbot import config_lib
from chromite.cbuildbot import constants
from chromite.lib import cidb
from chromite.lib import commandline
from chromite.lib import cros_build_lib
from chromite.lib import cros_logging as logging
from chromite.lib import git
from chromite.lib import gob_util
from chromite.lib import graphite
from chromite.lib import operation
from chromite.lib import osutils
from chromite.lib import parallel
from chromite.lib import remote_access
from chromite.lib import retry_util
from chromite.lib import terminal
from chromite.lib import timeout_util
site_config = config_lib.GetConfig()
# Unit tests should never connect to the live prod or debug instances
# of the cidb. This call ensures that they will not accidentally
# do so through the normal cidb SetUp / GetConnectionForBuilder factory.
cidb.CIDBConnectionFactory.SetupMockCidb()
# Likewise for statsd and elastic search.
graphite.ESMetadataFactory.SetupReadOnly()
graphite.StatsFactory.SetupMock()
Directory = collections.namedtuple('Directory', ['name', 'contents'])
class GlobalTestConfig(object):
"""Global configuration for tests."""
# By default, disable all network tests.
RUN_NETWORK_TESTS = False
NETWORK_TESTS_SKIPPED = 0
def NetworkTest(reason='Skipping network test (re-run w/--network)'):
"""Decorator for unit tests. Skip the test if --network is not specified."""
def Decorator(test_item):
@functools.wraps(test_item)
def NetworkWrapper(*args, **kwargs):
if not GlobalTestConfig.RUN_NETWORK_TESTS:
GlobalTestConfig.NETWORK_TESTS_SKIPPED += 1
raise unittest.SkipTest(reason)
test_item(*args, **kwargs)
# We can't check GlobalTestConfig.RUN_NETWORK_TESTS here because
# __main__ hasn't run yet. Wrap each test so that we check the flag before
# running it.
if isinstance(test_item, type) and issubclass(test_item, TestCase):
test_item.setUp = Decorator(test_item.setUp)
return test_item
else:
return NetworkWrapper
return Decorator
def _FlattenStructure(base_path, dir_struct):
"""Converts a directory structure to a list of paths."""
flattened = []
for obj in dir_struct:
if isinstance(obj, Directory):
new_base = os.path.join(base_path, obj.name).rstrip(os.sep)
flattened.append(new_base + os.sep)
flattened.extend(_FlattenStructure(new_base, obj.contents))
else:
assert isinstance(obj, basestring)
flattened.append(os.path.join(base_path, obj))
return flattened
def CreateOnDiskHierarchy(base_path, dir_struct):
"""Creates on-disk representation of an in-memory directory structure.
Args:
base_path: The absolute root of the directory structure.
dir_struct: A recursively defined data structure that represents a
directory tree. The basic form is a list. Elements can be file names or
cros_test_lib.Directory objects. The 'contents' attribute of Directory
types is a directory structure representing the contents of the directory.
Examples:
- ['file1', 'file2']
- ['file1', Directory('directory', ['deepfile1', 'deepfile2']), 'file2']
"""
flattened = _FlattenStructure(base_path, dir_struct)
for f in flattened:
f = os.path.join(base_path, f)
if f.endswith(os.sep):
osutils.SafeMakedirs(f)
else:
osutils.Touch(f, makedirs=True)
def _VerifyDirectoryIterables(existing, expected):
"""Compare two iterables representing contents of a directory.
Paths in |existing| and |expected| will be compared for exact match.
Args:
existing: An iterable containing paths that exist.
expected: An iterable of paths that are expected.
Raises:
AssertionError when there is any divergence between |existing| and
|expected|.
"""
def FormatPaths(paths):
return '\n'.join(sorted(paths))
existing = set(existing)
expected = set(expected)
unexpected = existing - expected
if unexpected:
raise AssertionError('Found unexpected paths:\n%s'
% FormatPaths(unexpected))
missing = expected - existing
if missing:
raise AssertionError('These files were expected but not found:\n%s'
% FormatPaths(missing))
def VerifyOnDiskHierarchy(base_path, dir_struct):
"""Verify that an on-disk directory tree exactly matches a given structure.
Args:
base_path: See CreateOnDiskHierarchy()
dir_struct: See CreateOnDiskHierarchy()
Raises:
AssertionError when there is any divergence between the on-disk
structure and the structure specified by 'dir_struct'.
"""
expected = _FlattenStructure(base_path, dir_struct)
_VerifyDirectoryIterables(osutils.DirectoryIterator(base_path), expected)
def VerifyTarball(tarball, dir_struct):
"""Compare the contents of a tarball against a directory structure.
Args:
tarball: Path to the tarball.
dir_struct: See CreateOnDiskHierarchy()
Raises:
AssertionError when there is any divergence between the tarball and the
structure specified by 'dir_struct'.
"""
contents = cros_build_lib.RunCommand(
['tar', '-tf', tarball], capture_output=True).output.splitlines()
normalized = set()
for p in contents:
norm = os.path.normpath(p)
if p.endswith('/'):
norm += '/'
if norm in normalized:
raise AssertionError('Duplicate entry %r found in %r!' % (norm, tarball))
normalized.add(norm)
expected = _FlattenStructure('', dir_struct)
_VerifyDirectoryIterables(normalized, expected)
class StackedSetup(type):
"""Metaclass to simplify unit testing and make it more robust.
A metaclass alters the way that classes are initialized, enabling us to
modify the class dictionary prior to the class being created. We use this
feature here to modify the way that unit tests work a bit.
This class does three things:
1) When a test case is set up or torn down, we now run all setUp and
tearDown methods in the inheritance tree.
2) If a setUp or tearDown method fails, we still run tearDown methods
for any test classes that were partially or completely set up.
3) All test cases time out after TEST_CASE_TIMEOUT seconds.
To use this class, set the following in your class:
__metaclass__ = StackedSetup
Since cros_test_lib.TestCase uses this metaclass, all derivatives of TestCase
also inherit the above behavior (unless they override the __metaclass__
attribute manually.)
"""
TEST_CASE_TIMEOUT = 10 * 60
def __new__(mcs, mcs_name, bases, scope):
"""Generate the new class with pointers to original funcs & our helpers"""
if 'setUp' in scope:
scope['__raw_setUp__'] = scope.pop('setUp')
scope['setUp'] = mcs._stacked_setUp
if 'tearDown' in scope:
scope['__raw_tearDown__'] = scope.pop('tearDown')
scope['tearDown'] = mcs._stacked_tearDown
# Modify all test* methods to time out after TEST_CASE_TIMEOUT seconds.
timeout = scope.get('TEST_CASE_TIMEOUT', StackedSetup.TEST_CASE_TIMEOUT)
if timeout is not None:
for name, func in scope.iteritems():
if name.startswith('test') and hasattr(func, '__call__'):
wrapper = timeout_util.TimeoutDecorator(timeout)
scope[name] = wrapper(func)
return type.__new__(mcs, mcs_name, bases, scope)
@staticmethod
def _walk_mro_stacking(obj, attr, reverse=False):
"""Walk the stacked classes (python method resolution order)"""
iterator = iter if reverse else reversed
methods = (getattr(x, attr, None) for x in iterator(obj.__class__.__mro__))
seen = set()
for x in filter(None, methods):
x = getattr(x, 'im_func', x)
if x not in seen:
seen.add(x)
yield x
@staticmethod
def _stacked_setUp(obj):
"""Run all the setUp funcs; if any fail, run all the tearDown funcs"""
obj.__test_was_run__ = False
try:
for target in StackedSetup._walk_mro_stacking(obj, '__raw_setUp__'):
target(obj)
except:
# TestCase doesn't trigger tearDowns if setUp failed; thus
# manually force it ourselves to ensure cleanup occurs.
StackedSetup._stacked_tearDown(obj)
raise
# Now mark the object as fully setUp; this is done so that
# any last minute assertions in tearDown can know if they should
# run or not.
obj.__test_was_run__ = True
@staticmethod
def _stacked_tearDown(obj):
"""Run all the tearDown funcs; if any fail, we move on to the next one"""
exc_info = None
for target in StackedSetup._walk_mro_stacking(obj, '__raw_tearDown__',
True):
# pylint: disable=bare-except
try:
target(obj)
except:
# Preserve the exception, throw it after running
# all tearDowns; we throw just the first also. We suppress
# pylint's warning here since it can't understand that we're
# actually raising the exception, just in a nonstandard way.
if exc_info is None:
exc_info = sys.exc_info()
if exc_info:
# Chuck the saved exception, w/ the same TB from
# when it occurred.
raise exc_info[0], exc_info[1], exc_info[2]
class TruthTable(object):
"""Class to represent a boolean truth table, useful in unit tests.
If you find yourself testing the behavior of some function that should
basically follow the behavior of a particular truth table, then this class
can allow you to fully test that function without being overly verbose
in the unit test code.
The following usage is supported on a constructed TruthTable:
1) Iterate over input lines of the truth table, expressed as tuples of
bools.
2) Access a particular input line by index, expressed as a tuple of bools.
3) Access the expected output for a set of inputs.
For example, say function "Foo" in module "mod" should consists of the
following code:
def Foo(A, B, C):
return A and B and not C
In the unittest for Foo, do this:
def testFoo(self):
truth_table = cros_test_lib.TruthTable(inputs=[(True, True, True)])
for inputs in truth_table:
a, b, c = inputs
result = mod.Foo(a, b, c)
self.assertEquals(result, truth_table.GetOutput(inputs))
"""
class TruthTableInputIterator(object):
"""Class to support iteration over inputs of a TruthTable."""
def __init__(self, truth_table):
self.truth_table = truth_table
self.next_line = 0
def __iter__(self):
return self
def __next__(self):
return self.next()
def next(self):
if self.next_line < self.truth_table.num_lines:
self.next_line += 1
return self.truth_table.GetInputs(self.next_line - 1)
else:
raise StopIteration()
def __init__(self, inputs, input_result=True):
"""Construct a TruthTable from given inputs.
Args:
inputs: Iterable of input lines, each expressed as a tuple of bools.
Each tuple must have the same length.
input_result: The output intended for each specified input. For
truth tables that mostly output True it is more concise to specify
the false inputs and then set input_result to False.
"""
# At least one input required.
if not inputs:
raise ValueError('Inputs required to construct TruthTable.')
# Save each input tuple in a set. Also confirm that the length
# of each input tuple is the same.
self.dimension = len(inputs[0])
self.num_lines = pow(2, self.dimension)
self.expected_inputs = set()
self.expected_inputs_result = input_result
for input_vals in inputs:
if len(input_vals) != self.dimension:
raise ValueError('All TruthTable inputs must have same dimension.')
self.expected_inputs.add(input_vals)
# Start generator index at 0.
self.next_line = 0
def __len__(self):
return self.num_lines
def __iter__(self):
return self.TruthTableInputIterator(self)
def GetInputs(self, inputs_index):
"""Get the input line at the given input index.
Args:
inputs_index: Following must hold: 0 <= inputs_index < self.num_lines.
Returns:
Tuple of bools representing one line of inputs.
"""
if inputs_index >= 0 and inputs_index < self.num_lines:
line_values = []
# Iterate through each column in truth table. Any order will
# produce a valid truth table, but going backward through
# columns will produce the traditional truth table ordering.
# For 2-dimensional example: F,F then F,T then T,F then T,T.
for col in xrange(self.dimension - 1, -1, -1):
line_values.append(bool(inputs_index / pow(2, col) % 2))
return tuple(line_values)
raise ValueError('This truth table has no line at index %r.' % inputs_index)
def GetOutput(self, inputs):
"""Get the boolean output for the given inputs.
Args:
inputs: Tuple of bools, length must be equal to self.dimension.
Returns:
bool value representing truth table output for given inputs.
"""
if not isinstance(inputs, tuple):
raise TypeError('Truth table inputs must be specified as a tuple.')
if not len(inputs) == self.dimension:
raise ValueError('Truth table inputs must match table dimension.')
return self.expected_inputs_result == (inputs in self.expected_inputs)
class EasyAttr(dict):
"""Convenient class for simulating objects with attributes in tests.
An EasyAttr object can be created with any attributes initialized very
easily. Examples:
1) An object with .id=45 and .name="Joe":
testobj = EasyAttr(id=45, name="Joe")
2) An object with .title.text="Big" and .owner.text="Joe":
testobj = EasyAttr(title=EasyAttr(text="Big"), owner=EasyAttr(text="Joe"))
"""
__slots__ = ()
def __getattr__(self, attr):
try:
return self[attr]
except KeyError:
raise AttributeError(attr)
def __delattr__(self, attr):
try:
self.pop(attr)
except KeyError:
raise AttributeError(attr)
def __setattr__(self, attr, value):
self[attr] = value
def __dir__(self):
return self.keys()
class LogFilter(logging.Filter):
"""A simple log filter that intercepts log messages and stores them."""
def __init__(self):
logging.Filter.__init__(self)
self.messages = cStringIO.StringIO()
def filter(self, record):
self.messages.write(record.getMessage() + '\n')
# Return False to prevent the message from being displayed.
return False
class LoggingCapturer(object):
"""Captures all messages emitted by the logging module."""
def __init__(self, logger_name='', log_level=logging.DEBUG):
self._log_filter = LogFilter()
self._old_level = None
self._log_level = log_level
self.logger_name = logger_name
def __enter__(self):
self.StartCapturing()
return self
def __exit__(self, exc_type, exc_val, exc_tb):
self.StopCapturing()
def StartCapturing(self):
"""Begin capturing logging messages."""
logger = logging.getLogger(self.logger_name)
self._old_level = logger.getEffectiveLevel()
logger.setLevel(self._log_level)
logger.addFilter(self._log_filter)
def StopCapturing(self):
"""Stop capturing logging messages."""
logger = logging.getLogger(self.logger_name)
logger.setLevel(self._old_level)
logger.removeFilter(self._log_filter)
@property
def messages(self):
return self._log_filter.messages.getvalue()
def LogsMatch(self, regex):
"""Checks whether the logs match a given regex."""
match = re.search(regex, self.messages, re.MULTILINE)
return match is not None
def LogsContain(self, msg):
"""Checks whether the logs contain a given string."""
return self.LogsMatch(re.escape(msg))
class TestCase(unittest.TestCase):
"""Basic chromite test case.
Provides sane setUp/tearDown logic so that tearDown is correctly cleaned up.
Takes care of saving/restoring process-wide settings like the environment so
that sub-tests don't have to worry about gettings this right.
Also includes additional assert helpers beyond python stdlib.
"""
__metaclass__ = StackedSetup
# List of vars chromite is globally sensitive to and that should
# be suppressed for tests.
ENVIRON_VARIABLE_SUPPRESSIONS = ('CROS_CACHEDIR',)
def __init__(self, *args, **kwargs):
unittest.TestCase.__init__(self, *args, **kwargs)
# This is set to keep pylint from complaining.
self.__test_was_run__ = False
def setUp(self):
self.__saved_env__ = os.environ.copy()
self.__saved_cwd__ = os.getcwd()
self.__saved_umask__ = os.umask(0o22)
for x in self.ENVIRON_VARIABLE_SUPPRESSIONS:
os.environ.pop(x, None)
def tearDown(self):
osutils.SetEnvironment(self.__saved_env__)
os.chdir(self.__saved_cwd__)
os.umask(self.__saved_umask__)
def id(self):
"""Return a name that can be passed in via the command line."""
return '%s.%s' % (self.__class__.__name__, self._testMethodName)
def __str__(self):
"""Return a pretty name that can be passed in via the command line."""
return '[%s] %s' % (self.__module__, self.id())
def assertRaises2(self, exception, functor, *args, **kwargs):
"""Like assertRaises, just with checking of the exception.
Args:
exception: The expected exception type to intecept.
functor: The function to invoke.
args: Positional args to pass to the function.
kwargs: Optional args to pass to the function. Note we pull
exact_kls, msg, and check_attrs from these kwargs.
exact_kls: If given, the exception raise must be *exactly* that class
type; derivatives are a failure.
check_attrs: If given, a mapping of attribute -> value to assert on
the resultant exception. Thus if you wanted to catch a ENOENT, you
would do:
assertRaises2(EnvironmentError, func, args,
check_attrs={'errno': errno.ENOENT})
ex_msg: A substring that should be in the stringified exception.
msg: The error message to be displayed if the exception isn't raised.
If not given, a suitable one is defaulted to.
returns: The exception object.
"""
exact_kls = kwargs.pop('exact_kls', None)
check_attrs = kwargs.pop('check_attrs', {})
ex_msg = kwargs.pop('ex_msg', None)
msg = kwargs.pop('msg', None)
if msg is None:
msg = ("%s(*%r, **%r) didn't throw an exception"
% (functor.__name__, args, kwargs))
try:
functor(*args, **kwargs)
raise AssertionError(msg)
except exception as e:
if ex_msg:
self.assertIn(ex_msg, str(e))
if exact_kls:
self.assertEqual(e.__class__, exception)
bad = []
for attr, required in check_attrs.iteritems():
self.assertTrue(hasattr(e, attr),
msg='%s lacks attr %s' % (e, attr))
value = getattr(e, attr)
if value != required:
bad.append('%s attr is %s, needed to be %s'
% (attr, value, required))
if bad:
raise AssertionError('\n'.join(bad))
return e
def assertExists(self, path):
"""Make sure |path| exists"""
if not os.path.exists(path):
msg = ['path is missing: %s' % path]
while path != '/':
path = os.path.dirname(path)
if not path:
# If we're given something like "foo", abort once we get to "".
break
result = os.path.exists(path)
msg.append('\tos.path.exists(%s): %s' % (path, result))
if result:
msg.append('\tcontents: %r' % os.listdir(path))
break
raise self.failureException('\n'.join(msg))
def assertNotExists(self, path):
"""Make sure |path| does not exist"""
if os.path.exists(path):
raise self.failureException('path exists when it should not: %s' % path)
def assertStartsWith(self, s, prefix):
"""Asserts that |s| starts with |prefix|.
This function should be preferred over assertTrue(s.startswith(prefix)) for
it produces better error failure message than the other.
"""
if not s.startswith(prefix):
raise self.failureException('%s does not starts with %s' % (s, prefix))
def assertEndsWith(self, s, suffix):
"""Asserts that |s| ends with |suffix|.
This function should be preferred over assertTrue(s.endswith(suffix)) for
it produces better error failure message than the other.
"""
if not s.endswith(suffix):
raise self.failureException('%s does not starts with %s' % (s, suffix))
def GetSequenceDiff(self, seq1, seq2):
"""Get a string describing the difference between two sequences.
Args:
seq1: First sequence to compare.
seq2: Second sequence to compare.
Returns:
A string that describes how the two sequences differ.
"""
try:
self.assertSequenceEqual(seq1, seq2)
except AssertionError as ex:
return ex.message
else:
return 'no differences'
class LoggingTestCase(TestCase):
"""Base class for logging capturer test cases."""
def AssertLogsMatch(self, log_capturer, regex, inverted=False):
"""Verifies a regex matches the logs."""
assert_msg = '%r not found in %r' % (regex, log_capturer.messages)
assert_fn = self.assertTrue
if inverted:
assert_msg = '%r found in %r' % (regex, log_capturer.messages)
assert_fn = self.assertFalse
assert_fn(log_capturer.LogsMatch(regex), msg=assert_msg)
def AssertLogsContain(self, log_capturer, msg, inverted=False):
"""Verifies a message is contained in the logs."""
return self.AssertLogsMatch(log_capturer, re.escape(msg), inverted=inverted)
class OutputTestCase(TestCase):
"""Base class for cros unit tests with utility methods."""
# These work with error output from operation module.
ERROR_MSG_RE = re.compile(r'^\033\[1;%dm(.+?)(?:\033\[0m)+$' %
(30 + terminal.Color.RED,), re.DOTALL)
WARNING_MSG_RE = re.compile(r'^\033\[1;%dm(.+?)(?:\033\[0m)+$' %
(30 + terminal.Color.YELLOW,), re.DOTALL)
def __init__(self, *args, **kwargs):
"""Base class __init__ takes a second argument."""
TestCase.__init__(self, *args, **kwargs)
self._output_capturer = None
def OutputCapturer(self, *args, **kwargs):
"""Create and return OutputCapturer object."""
self._output_capturer = cros_build_lib.OutputCapturer(*args, **kwargs)
return self._output_capturer
def _GetOutputCapt(self):
"""Internal access to existing OutputCapturer.
Raises RuntimeError if output capturing was never on.
"""
if self._output_capturer:
return self._output_capturer
raise RuntimeError('Output capturing was never turned on for this test.')
def _GenCheckMsgFunc(self, prefix_re, line_re):
"""Return boolean func to check a line given |prefix_re| and |line_re|."""
def _method(line):
if prefix_re:
# Prefix regexp will strip off prefix (and suffix) from line.
match = prefix_re.search(line)
if match:
line = match.group(1)
else:
return False
return line_re.search(line) if line_re else True
if isinstance(prefix_re, str):
prefix_re = re.compile(prefix_re)
if isinstance(line_re, str):
line_re = re.compile(line_re)
# Provide a description of what this function looks for in a line. Error
# messages can make use of this.
_method.description = None
if prefix_re and line_re:
_method.description = ('line matching prefix regexp %r then regexp %r' %
(prefix_re.pattern, line_re.pattern))
elif prefix_re:
_method.description = 'line matching prefix regexp %r' % prefix_re.pattern
elif line_re:
_method.description = 'line matching regexp %r' % line_re.pattern
else:
raise RuntimeError('Nonsensical usage of _GenCheckMsgFunc: '
'no prefix_re or line_re')
return _method
def _ContainsMsgLine(self, lines, msg_check_func):
return any(msg_check_func(ln) for ln in lines)
def _GenOutputDescription(self, check_stdout, check_stderr):
# Some extra logic to make an error message useful.
if check_stdout and check_stderr:
return 'stdout or stderr'
elif check_stdout:
return 'stdout'
elif check_stderr:
return 'stderr'
def _AssertOutputContainsMsg(self, check_msg_func, invert,
check_stdout, check_stderr):
assert check_stdout or check_stderr
lines = []
if check_stdout:
lines.extend(self._GetOutputCapt().GetStdoutLines())
if check_stderr:
lines.extend(self._GetOutputCapt().GetStderrLines())
result = self._ContainsMsgLine(lines, check_msg_func)
# Some extra logic to make an error message useful.
output_desc = self._GenOutputDescription(check_stdout, check_stderr)
if invert:
msg = ('expected %s to not contain %s,\nbut found it in:\n%s' %
(output_desc, check_msg_func.description, lines))
self.assertFalse(result, msg=msg)
else:
msg = ('expected %s to contain %s,\nbut did not find it in:\n%s' %
(output_desc, check_msg_func.description, lines))
self.assertTrue(result, msg=msg)
def AssertOutputContainsError(self, regexp=None, invert=False,
check_stdout=True, check_stderr=False):
"""Assert requested output contains at least one error line.
If |regexp| is non-null, then the error line must also match it.
If |invert| is true, then assert the line is NOT found.
Raises RuntimeError if output capturing was never on for this test.
"""
check_msg_func = self._GenCheckMsgFunc(self.ERROR_MSG_RE, regexp)
return self._AssertOutputContainsMsg(check_msg_func, invert,
check_stdout, check_stderr)
def AssertOutputContainsWarning(self, regexp=None, invert=False,
check_stdout=True, check_stderr=False):
"""Assert requested output contains at least one warning line.
If |regexp| is non-null, then the warning line must also match it.
If |invert| is true, then assert the line is NOT found.
Raises RuntimeError if output capturing was never on for this test.
"""
check_msg_func = self._GenCheckMsgFunc(self.WARNING_MSG_RE, regexp)
return self._AssertOutputContainsMsg(check_msg_func, invert,
check_stdout, check_stderr)
def AssertOutputContainsLine(self, regexp, invert=False,
check_stdout=True, check_stderr=False):
"""Assert requested output contains line matching |regexp|.
If |invert| is true, then assert the line is NOT found.
Raises RuntimeError if output capturing was never on for this test.
"""
check_msg_func = self._GenCheckMsgFunc(None, regexp)
return self._AssertOutputContainsMsg(check_msg_func, invert,
check_stdout, check_stderr)
def _AssertOutputEndsInMsg(self, check_msg_func,
check_stdout, check_stderr):
"""Pass if requested output(s) ends(end) with an error message."""
assert check_stdout or check_stderr
lines = []
if check_stdout:
stdout_lines = self._GetOutputCapt().GetStdoutLines(include_empties=False)
if stdout_lines:
lines.append(stdout_lines[-1])
if check_stderr:
stderr_lines = self._GetOutputCapt().GetStderrLines(include_empties=False)
if stderr_lines:
lines.append(stderr_lines[-1])
result = self._ContainsMsgLine(lines, check_msg_func)
# Some extra logic to make an error message useful.
output_desc = self._GenOutputDescription(check_stdout, check_stderr)
msg = ('expected %s to end with %s,\nbut did not find it in:\n%s' %
(output_desc, check_msg_func.description, lines))
self.assertTrue(result, msg=msg)
def AssertOutputEndsInError(self, regexp=None,
check_stdout=True, check_stderr=False):
"""Assert requested output ends in error line.
If |regexp| is non-null, then the error line must also match it.
Raises RuntimeError if output capturing was never on for this test.
"""
check_msg_func = self._GenCheckMsgFunc(self.ERROR_MSG_RE, regexp)
return self._AssertOutputEndsInMsg(check_msg_func,
check_stdout, check_stderr)
def AssertOutputEndsInWarning(self, regexp=None,
check_stdout=True, check_stderr=False):
"""Assert requested output ends in warning line.
If |regexp| is non-null, then the warning line must also match it.
Raises RuntimeError if output capturing was never on for this test.
"""
check_msg_func = self._GenCheckMsgFunc(self.WARNING_MSG_RE, regexp)
return self._AssertOutputEndsInMsg(check_msg_func,
check_stdout, check_stderr)
def AssertOutputEndsInLine(self, regexp,
check_stdout=True, check_stderr=False):
"""Assert requested output ends in line matching |regexp|.
Raises RuntimeError if output capturing was never on for this test.
"""
check_msg_func = self._GenCheckMsgFunc(None, regexp)
return self._AssertOutputEndsInMsg(check_msg_func,
check_stdout, check_stderr)
def FuncCatchSystemExit(self, func, *args, **kwargs):
"""Run |func| with |args| and |kwargs| and catch exceptions.SystemExit.
Return tuple (return value or None, SystemExit number code or None).
"""
try:
returnval = func(*args, **kwargs)
return returnval, None
except exceptions.SystemExit as ex:
exit_code = ex.args[0]
return None, exit_code
def AssertFuncSystemExitZero(self, func, *args, **kwargs):
"""Run |func| with |args| and |kwargs| catching exceptions.SystemExit.
If the func does not raise a SystemExit with exit code 0 then assert.
"""
exit_code = self.FuncCatchSystemExit(func, *args, **kwargs)[1]
self.assertIsNot(exit_code, None,
msg='Expected system exit code 0, but caught none')
self.assertEqual(exit_code, 0,
msg=('Expected system exit code 0, but caught %d' %
exit_code))
def AssertFuncSystemExitNonZero(self, func, *args, **kwargs):
"""Run |func| with |args| and |kwargs| catching exceptions.SystemExit.
If the func does not raise a non-zero SystemExit code then assert.
"""
exit_code = self.FuncCatchSystemExit(func, *args, **kwargs)[1]
self.assertIsNot(exit_code, None,
msg='Expected non-zero system exit code, but caught none')
self.assertNotEqual(exit_code, 0,
msg=('Expected non-zero system exit code, but caught %d'
% exit_code))
def AssertRaisesAndReturn(self, error, func, *args, **kwargs):
"""Like assertRaises, but return exception raised."""
try:
func(*args, **kwargs)
self.fail(msg='Expected %s but got none' % error)
except error as ex:
return ex
class TempDirTestCase(TestCase):
"""Mixin used to give each test a tempdir that is cleansed upon finish"""
# Whether to delete tempdir used by this test. cf: SkipCleanup.
DELETE = True
_NO_DELETE_TEMPDIR_OBJ = None
def __init__(self, *args, **kwargs):
TestCase.__init__(self, *args, **kwargs)
self.tempdir = None
self._tempdir_obj = None
@classmethod
def SkipCleanup(cls):
"""Leave behind tempdirs created by instances of this class.
Calling this function ensures that all future instances will leak their
temporary directories. Additionally, all future temporary directories will
be created inside one top level temporary directory, so that you can easily
blow them away when you're done.
Currently, this function is pretty stupid. You should call it *before*
creating any instances.
Returns:
Path to a temporary directory that contains all future temporary
directories created by instances of this class.
"""
cls.DELETE = False
cls._NO_DELETE_TEMPDIR_OBJ = osutils.TempDir(
prefix='chromite.test_no_cleanup',
set_global=True,
delete=cls.DELETE)
logging.info('%s requested to SkipCleanup. Will leak %s',
cls.__name__, cls._NO_DELETE_TEMPDIR_OBJ.tempdir)
return cls._NO_DELETE_TEMPDIR_OBJ.tempdir
def setUp(self):
self._tempdir_obj = osutils.TempDir(prefix='chromite.test', set_global=True,
delete=self.DELETE)
self.tempdir = self._tempdir_obj.tempdir
def tearDown(self):
if self._tempdir_obj is not None:
self._tempdir_obj.Cleanup()
self._tempdir_obj = None
self.tempdir = None
def assertFileContents(self, file_path, content):
"""Assert that the file contains the given content."""
self.assertExists(file_path)
read_content = osutils.ReadFile(file_path)
self.assertEqual(read_content, content)
class LocalSqlServerTestCase(TempDirTestCase):
"""A TestCase that launches a local mysqld server in the background.
- This test must run insde the chroot.
- This class provides attributes:
- mysqld_host: The IP of the local mysqld server.
- mysqld_port: The port of the local mysqld server.
"""
# Neither of these are in the PATH for a non-sudo user.
MYSQL_INSTALL_DB = '/usr/share/mysql/scripts/mysql_install_db'
MYSQLD = '/usr/sbin/mysqld'
MYSQLD_SHUTDOWN_TIMEOUT_S = 30
def __init__(self, *args, **kwargs):
TempDirTestCase.__init__(self, *args, **kwargs)
self.mysqld_host = None
self.mysqld_port = None
self._mysqld_dir = None
self._mysqld_runner = None
self._mysqld_needs_cleanup = False
# This class has assumptions about the mariadb installation that are only
# guaranteed to hold inside the chroot.
cros_build_lib.AssertInsideChroot()
def setUp(self):
"""Launch mysqld in a clean temp directory."""
self._mysqld_dir = os.path.join(self.tempdir, 'mysqld_dir')
osutils.SafeMakedirs(self._mysqld_dir)
mysqld_tmp_dir = os.path.join(self._mysqld_dir, 'tmp')
osutils.SafeMakedirs(mysqld_tmp_dir)
# MYSQL_INSTALL_DB is stupid. It can't parse '--flag value'.
# Must give it options in '--flag=value' form.
cmd = [
self.MYSQL_INSTALL_DB,
'--no-defaults',
'--basedir=/usr',
'--ldata=%s' % self._mysqld_dir,
]
cros_build_lib.RunCommand(cmd, quiet=True)
self.mysqld_host = '127.0.0.1'
self.mysqld_port = remote_access.GetUnusedPort()
cmd = [
self.MYSQLD,
'--no-defaults',
'--datadir', self._mysqld_dir,
'--socket', os.path.join(self._mysqld_dir, 'mysqld.socket'),
'--port', str(self.mysqld_port),
'--pid-file', os.path.join(self._mysqld_dir, 'mysqld.pid'),
'--tmpdir', mysqld_tmp_dir,
]
self._mysqld_runner = parallel.BackgroundTaskRunner(
cros_build_lib.RunCommand,
processes=1,
halt_on_error=True)
queue = self._mysqld_runner.__enter__()
queue.put((cmd,))
# Ensure that the Sql server is up before continuing.
cmd = [
'mysqladmin',
'-S', os.path.join(self._mysqld_dir, 'mysqld.socket'),
'ping',
]
try:
retry_util.RunCommandWithRetries(cmd=cmd, quiet=True, max_retry=5,
sleep=1, backoff_factor=1.5)
except Exception as e:
self._mysqld_needs_cleanup = True
logging.warning('Mysql server failed to show up! (%s)', e)
raise
def tearDown(self):
"""Cleanup mysqld and our mysqld data directory."""
mysqld_socket = os.path.join(self._mysqld_dir, 'mysqld.socket')
if os.path.exists(mysqld_socket):
try:
cmd = [
'mysqladmin',
'-S', os.path.join(self._mysqld_dir, 'mysqld.socket'),
'-u', 'root',
'shutdown',
]
cros_build_lib.RunCommand(cmd, quiet=True)
except cros_build_lib.RunCommandError as e:
self._mysqld_needs_cleanup = True
logging.warning('Could not stop test mysqld daemon (%s)', e)
# Explicitly stop the mysqld process before removing the working directory.
if self._mysqld_runner is not None:
if self._mysqld_needs_cleanup:
self._mysqld_runner.__exit__(
cros_build_lib.RunCommandError,
'Artification exception to cleanup mysqld',
None)
else:
self._mysqld_runner.__exit__(None, None, None)
class MockTestCase(TestCase):
"""Python-mock based test case; compatible with StackedSetup"""
def setUp(self):
self._patchers = []
def tearDown(self):
# We can't just run stopall() by itself, and need to stop our patchers
# manually since stopall() doesn't handle repatching.
cros_build_lib.SafeRun([p.stop for p in reversed(self._patchers)] +
[mock.patch.stopall])
def StartPatcher(self, patcher):
"""Call start() on the patcher, and stop() in tearDown."""
m = patcher.start()
self._patchers.append(patcher)
return m
def PatchObject(self, *args, **kwargs):
"""Create and start a mock.patch.object().
stop() will be called automatically during tearDown.
"""
return self.StartPatcher(mock.patch.object(*args, **kwargs))
# MockTestCase must be before TempDirTestCase in this inheritance order,
# because MockTestCase.StartPatcher() calls may be for PartialMocks, which
# create their own temporary directory. The teardown for those directories
# occurs during MockTestCase.tearDown(), which needs to be run before
# TempDirTestCase.tearDown().
class MockTempDirTestCase(MockTestCase, TempDirTestCase):
"""Convenience class mixing TempDir and Mock."""
class GerritTestCase(MockTempDirTestCase):
"""Test class for tests that interact with a Gerrit server.
Configured by default to use a specially-configured test Gerrit server at
t3st-chr0m3(-review).googlesource.com. The test server configuration may be
altered by setting the following environment variables from the parent
process:
CROS_TEST_GIT_HOST: host name for git operations; defaults to
t3st-chr0me.googlesource.com.
CROS_TEST_GERRIT_HOST: host name for Gerrit operations; defaults to
t3st-chr0me-review.googlesource.com.
CROS_TEST_COOKIES_PATH: path to a cookies.txt file to use for git/Gerrit
requests; defaults to none.
CROS_TEST_COOKIE_NAMES: comma-separated list of cookie names from
CROS_TEST_COOKIES_PATH to set on requests; defaults
to none. The current implementation only sends
cookies matching the exact host name and the empty
path ("/").
"""
# pylint: disable=protected-access
TEST_USERNAME = 'test-username'
TEST_EMAIL = '[email protected]'
GerritInstance = collections.namedtuple('GerritInstance', [
'cookie_names',
'cookies_path',
'gerrit_host',
'gerrit_url',
'git_host',
'git_url',
'netrc_file',
'project_prefix',
])
def _create_gerrit_instance(self, tmp_dir):
default_host = 't3st-chr0m3'
git_host = os.environ.get('CROS_TEST_GIT_HOST',
'%s.googlesource.com' % default_host)
gerrit_host = os.environ.get('CROS_TEST_GERRIT_HOST',
'%s-review.googlesource.com' % default_host)
ip = socket.gethostbyname(socket.gethostname())
project_prefix = 'test-%s-%s/' % (
datetime.datetime.now().strftime('%Y%m%d%H%M%S'),
hashlib.sha1('%s_%s' % (ip, os.getpid())).hexdigest()[:8])
cookies_path = os.environ.get('CROS_TEST_COOKIES_PATH')
cookie_names_str = os.environ.get('CROS_TEST_COOKIE_NAMES', '')
cookie_names = [c for c in cookie_names_str.split(',') if c]
return self.GerritInstance(
cookie_names=cookie_names,
cookies_path=cookies_path,
gerrit_host=gerrit_host,
gerrit_url='https://%s/' % gerrit_host,
git_host=git_host,
git_url='https://%s/' % git_host,
# TODO(dborowitz): Ensure this is populated when using role account.
netrc_file=os.path.join(tmp_dir, '.netrc'),
project_prefix=project_prefix,)
def _populate_netrc(self, src):
"""Sets up a test .netrc file using the given source as a base."""
# Heuristic: prefer passwords for @google.com accounts, since test host
# permissions tend to refer to those accounts.
preferred_account_domains = ['.google.com']
needed = [self.gerrit_instance.git_host, self.gerrit_instance.gerrit_host]
candidates = collections.defaultdict(list)
src_netrc = netrc.netrc(src)
for host, v in src_netrc.hosts.iteritems():
dot = host.find('.')
if dot < 0:
continue
for n in needed:
if n.endswith(host[dot:]):
login, _, password = v
i = 1
for pd in preferred_account_domains:
if login.endswith(pd):
i = 0
break
candidates[n].append((i, login, password))
with open(self.gerrit_instance.netrc_file, 'w') as out:
for n in needed:
cs = candidates[n]
self.assertGreater(len(cs), 0,
msg='missing password in ~/.netrc for %s' % n)
cs.sort()
_, login, password = cs[0]
out.write('machine %s login %s password %s\n' % (n, login, password))
def setUp(self):
"""Sets up the gerrit instances in a class-specific temp dir."""
old_home = os.environ['HOME']
os.environ['HOME'] = self.tempdir
# Create gerrit instance.
gi = self.gerrit_instance = self._create_gerrit_instance(self.tempdir)
netrc_path = os.path.join(old_home, '.netrc')
if os.path.exists(netrc_path):
self._populate_netrc(netrc_path)
# Set netrc file for http authentication.
self.PatchObject(gob_util, 'NETRC', netrc.netrc(gi.netrc_file))
if gi.cookies_path:
cros_build_lib.RunCommand(
['git', 'config', '--global', 'http.cookiefile', gi.cookies_path],
quiet=True)
# Set cookie file for http authentication
if gi.cookies_path:
jar = cookielib.MozillaCookieJar(gi.cookies_path)
jar.load(ignore_expires=True)
def GetCookies(host, _path):
ret = dict(
(c.name, urllib.unquote(c.value)) for c in jar
if c.domain == host and c.path == '/' and c.name in gi.cookie_names)
return ret
self.PatchObject(gob_util, 'GetCookies', GetCookies)
# Make all chromite code point to the test server.
self.saved_params = {}
self.patched_params = {
'EXTERNAL_GOB_HOST': gi.git_host,
'EXTERNAL_GERRIT_HOST': gi.gerrit_host,
'EXTERNAL_GOB_URL': gi.git_url,
'EXTERNAL_GERRIT_URL': gi.gerrit_url,
'INTERNAL_GOB_HOST': gi.git_host,
'INTERNAL_GERRIT_HOST': gi.gerrit_host,
'INTERNAL_GOB_URL': gi.git_url,
'INTERNAL_GERRIT_URL': gi.gerrit_url,
'AOSP_GOB_HOST': gi.git_host,
'AOSP_GERRIT_HOST': gi.gerrit_host,
'AOSP_GOB_URL': gi.git_url,
'AOSP_GERRIT_URL': gi.gerrit_url,
'MANIFEST_URL': '%s/%s' % (
gi.git_url, site_config.params.MANIFEST_PROJECT
),
'MANIFEST_INT_URL': '%s/%s' % (
gi.git_url, site_config.params.MANIFEST_INT_PROJECT
),
'GIT_REMOTES': {
site_config.params.EXTERNAL_REMOTE: gi.gerrit_url,
site_config.params.INTERNAL_REMOTE: gi.gerrit_url,
site_config.params.CHROMIUM_REMOTE: gi.gerrit_url,
site_config.params.CHROME_REMOTE: gi.gerrit_url
}
}
for k in self.patched_params.iterkeys():
self.saved_params[k] = site_config.params.get(k)
site_config._site_params.update(self.patched_params)
def tearDown(self):
# Restore the 'patched' site parameters.
site_config._site_params.update(self.saved_params)
def createProject(self, suffix, description='Test project', owners=None,
submit_type='CHERRY_PICK'):
"""Create a project on the test gerrit server."""
name = self.gerrit_instance.project_prefix + suffix
body = {
'description': description,
'submit_type': submit_type,
}
if owners is not None:
body['owners'] = owners
path = 'projects/%s' % urllib.quote(name, '')
conn = gob_util.CreateHttpConn(
self.gerrit_instance.gerrit_host, path, reqtype='PUT', body=body)
response = conn.getresponse()
self.assertEquals(201, response.status,
'Expected 201, got %s' % response.status)
s = cStringIO.StringIO(response.read())
self.assertEquals(")]}'", s.readline().rstrip())
jmsg = json.load(s)
self.assertEquals(name, jmsg['name'])
return name
def _CloneProject(self, name, path):
"""Clone a project from the test gerrit server."""
root = os.path.dirname(path)
osutils.SafeMakedirs(root)
url = '%s://%s/%s' % (
gob_util.GIT_PROTOCOL, self.gerrit_instance.git_host, name)
git.RunGit(root, ['clone', url, path])
# Install commit-msg hook.
hook_path = os.path.join(path, '.git', 'hooks', 'commit-msg')
hook_cmd = ['curl', '-n', '-o', hook_path]
if self.gerrit_instance.cookies_path:
hook_cmd.extend(['-b', self.gerrit_instance.cookies_path])
hook_cmd.append('https://%s/a/tools/hooks/commit-msg'
% self.gerrit_instance.gerrit_host)
cros_build_lib.RunCommand(hook_cmd, quiet=True)
os.chmod(hook_path, stat.S_IRWXU)
# Set git identity to test account
cros_build_lib.RunCommand(
['git', 'config', 'user.email', self.TEST_EMAIL], cwd=path, quiet=True)
return path
def cloneProject(self, name, path=None):
"""Clone a project from the test gerrit server."""
if path is None:
path = os.path.basename(name)
if path.endswith('.git'):
path = path[:-4]
path = os.path.join(self.tempdir, path)
return self._CloneProject(name, path)
@classmethod
def _CreateCommit(cls, clone_path, filename=None, msg=None, text=None,
amend=False):
"""Create a commit in the given git checkout.
Args:
clone_path: The directory on disk of the git clone.
filename: The name of the file to write. Optional.
msg: The commit message. Optional.
text: The text to append to the file. Optional.
amend: Whether to amend an existing patch. If set, we will amend the
HEAD commit in the checkout and upload that patch.
Returns:
(sha1, changeid) of the new commit.
"""
if not filename:
filename = 'test-file.txt'
if not msg:
msg = 'Test Message'
if not text:
text = 'Another day, another dollar.'
fpath = os.path.join(clone_path, filename)
osutils.WriteFile(fpath, '%s\n' % text, mode='a')
cros_build_lib.RunCommand(['git', 'add', filename], cwd=clone_path,
quiet=True)
cmd = ['git', 'commit']
cmd += ['--amend', '-C', 'HEAD'] if amend else ['-m', msg]
cros_build_lib.RunCommand(cmd, cwd=clone_path, quiet=True)
return cls._GetCommit(clone_path)
def createCommit(self, clone_path, filename=None, msg=None, text=None,
amend=False):
"""Create a commit in the given git checkout.
Args:
clone_path: The directory on disk of the git clone.
filename: The name of the file to write. Optional.
msg: The commit message. Optional.
text: The text to append to the file. Optional.
amend: Whether to amend an existing patch. If set, we will amend the
HEAD commit in the checkout and upload that patch.
"""
clone_path = os.path.join(self.tempdir, clone_path)
return self._CreateCommit(clone_path, filename, msg, text, amend)
@staticmethod
def _GetCommit(clone_path, ref='HEAD'):
log_proc = cros_build_lib.RunCommand(
['git', 'log', '-n', '1', ref], cwd=clone_path,
print_cmd=False, capture_output=True)
sha1 = None
change_id = None
for line in log_proc.output.splitlines():
match = re.match(r'^commit ([0-9a-fA-F]{40})$', line)
if match:
sha1 = match.group(1)
continue
match = re.match(r'^\s+Change-Id:\s*(\S+)$', line)
if match:
change_id = match.group(1)
continue
return (sha1, change_id)
def getCommit(self, clone_path, ref='HEAD'):
"""Get the sha1 and change-id for the head commit in a git checkout."""
clone_path = os.path.join(self.tempdir, clone_path)
(sha1, change_id) = self._GetCommit(clone_path, ref)
self.assertTrue(sha1)
self.assertTrue(change_id)
return (sha1, change_id)
@staticmethod
def _UploadChange(clone_path, branch='master', remote='origin'):
cros_build_lib.RunCommand(
['git', 'push', remote, 'HEAD:refs/for/%s' % branch], cwd=clone_path,
quiet=True)
def uploadChange(self, clone_path, branch='master', remote='origin'):
"""Create a gerrit CL from the HEAD of a git checkout."""
clone_path = os.path.join(self.tempdir, clone_path)
self._UploadChange(clone_path, branch, remote)
@staticmethod
def _PushBranch(clone_path, branch='master'):
cros_build_lib.RunCommand(
['git', 'push', 'origin', 'HEAD:refs/heads/%s' % branch],
cwd=clone_path, quiet=True)
def pushBranch(self, clone_path, branch='master'):
"""Push a branch directly to gerrit, bypassing code review."""
clone_path = os.path.join(self.tempdir, clone_path)
self._PushBranch(clone_path, branch)
def createAccount(self, name='Test User', email='[email protected]',
password=None, groups=None):
"""Create a new user account on gerrit."""
username = urllib.quote(email.partition('@')[0])
path = 'accounts/%s' % username
body = {
'name': name,
'email': email,
}
if password:
body['http_password'] = password
if groups:
if isinstance(groups, basestring):
groups = [groups]
body['groups'] = groups
conn = gob_util.CreateHttpConn(
self.gerrit_instance.gerrit_host, path, reqtype='PUT', body=body)
response = conn.getresponse()
self.assertEquals(201, response.status)
s = cStringIO.StringIO(response.read())
self.assertEquals(")]}'", s.readline().rstrip())
jmsg = json.load(s)
self.assertEquals(email, jmsg['email'])
class _RunCommandMock(mox.MockObject):
"""Custom mock class used to suppress arguments we don't care about"""
DEFAULT_IGNORED_ARGS = ('print_cmd',)
def __call__(self, *args, **kwargs):
for arg in self.DEFAULT_IGNORED_ARGS:
kwargs.setdefault(arg, mox.IgnoreArg())
return mox.MockObject.__call__(self, *args, **kwargs)
class _LessAnnoyingMox(mox.Mox):
"""Mox derivative that slips in our suppressions to mox.
This is used by default via MoxTestCase; namely, this suppresses
certain arguments awareness that we don't care about via switching
in (dependent on the namespace requested) overriding MockObject
classing.
Via this, it makes maintenance much simpler- simplest example, if code
doesn't explicitly assert that print_cmd must be true/false... then
we don't care about what argument is set (it has no effect beyond output).
Mox normally *would* care, making it a pita to maintain. This selectively
suppresses that awareness, making it maintainable.
"""
mock_classes = {}.fromkeys(
['chromite.lib.cros_build_lib.%s' % x
for x in dir(cros_build_lib) if 'RunCommand' in x],
_RunCommandMock)
@staticmethod
def _GetNamespace(obj):
return '%s.%s' % (obj.__module__, obj.__name__)
def CreateMock(self, obj, attrs=None):
if attrs is None:
attrs = {}
kls = self.mock_classes.get(
self._GetNamespace(obj), mox.MockObject)
# Copy attrs; I don't trust mox to not be stupid here.
new_mock = kls(obj, attrs=attrs)
self._mock_objects.append(new_mock)
return new_mock
class MoxTestCase(TestCase):
"""Mox based test case; compatible with StackedSetup
Note: mox is deprecated; please use MockTestCase instead.
"""
mox_suppress_verify_all = False
def setUp(self):
self.mox = _LessAnnoyingMox()
self.stubs = mox.stubout.StubOutForTesting()
def tearDown(self):
try:
if self.__test_was_run__ and not self.mox_suppress_verify_all:
# This means the test code was actually ran.
# force a verifyall
self.mox.VerifyAll()
finally:
if hasattr(self, 'mox'):
self.mox.UnsetStubs()
if hasattr(self, 'stubs'):
self.stubs.UnsetAll()
self.stubs.SmartUnsetAll()
class MoxTempDirTestCase(MoxTestCase, TempDirTestCase):
"""Convenience class mixing TempDir and Mox
Note: mox is deprecated; please use MockTempDirTestCase instead.
"""
class MoxOutputTestCase(OutputTestCase, MoxTestCase):
"""Conevenience class mixing OutputTestCase and MoxTestCase
Note: mox is deprecated; please use MockOutputTestCase instead.
"""
class MoxTempDirTestOutputCase(OutputTestCase, MoxTempDirTestCase):
"""Conevenience class mixing OutputTestCase and MoxTempDirTestCase
Note: mox is deprecated; please use MockOutputTestCase instead.
"""
class MockOutputTestCase(MockTestCase, OutputTestCase):
"""Convenience class mixing Output and Mock."""
class ProgressBarTestCase(MockOutputTestCase):
"""Test class to test the progress bar."""
# pylint: disable=protected-access
def setUp(self):
self._terminal_size = self.PatchObject(
operation.ProgressBarOperation, '_GetTerminalSize',
return_value=operation._TerminalSize(100, 20))
self.PatchObject(os, 'isatty', return_value=True)
def SetMockTerminalSize(self, width, height):
"""Set mock terminal's size."""
self._terminal_size.return_value = operation._TerminalSize(width, height)
def AssertProgressBarAllEvents(self, num_events):
"""Check that the progress bar is correct for all events."""
for i in xrange(num_events + 1):
self.AssertOutputContainsLine('%d%%' % (i * 100 / num_events))
class MockLoggingTestCase(MockTestCase, LoggingTestCase):
"""Convenience class mixing Logging and Mock."""
@contextlib.contextmanager
def SetTimeZone(tz):
"""Temporarily set the timezone to the specified value.
This is needed because cros_test_lib.TestCase doesn't call time.tzset()
after resetting the environment.
"""
old_environ = os.environ.copy()
try:
os.environ['TZ'] = tz
time.tzset()
yield
finally:
osutils.SetEnvironment(old_environ)
time.tzset()
class ListTestSuite(unittest.BaseTestSuite):
"""Stub test suite to list all possible tests"""
# We hack in |top| for local recursive usage.
# pylint: disable=arguments-differ
def run(self, result, _debug=False, top=True):
"""List all the tests this suite would have run."""
# Recursively build a list of all the tests and the descriptions.
# We do this so we can align the output when printing.
tests = []
# Walk all the tests that this suite itself holds.
for test in self:
if isinstance(test, type(self)):
tests += test(result, top=False)
else:
desc = test.shortDescription()
if desc is None:
desc = ''
tests.append((test.id(), desc))
if top:
if tests:
# Now that we have all the tests, print them in lined up columns.
maxlen = max(len(x[0]) for x in tests)
for test, desc in tests:
print('%-*s %s' % (maxlen, test, desc))
return result
else:
return tests
class ListTestLoader(unittest.TestLoader):
"""Stub test loader to list all possible tests"""
suiteClass = ListTestSuite
class ListTestRunner(object):
"""Stub test runner to list all possible tests"""
def run(self, test):
result = unittest.TestResult()
test(result)
return result
class TraceTestRunner(unittest.TextTestRunner):
"""Test runner that traces the test code as it runs
We insert tracing at the test runner level rather than test suite or test
case because both of those can execute code we've written (e.g. setUpClass
and setUp), and we want to trace that code too.
"""
TRACE_KWARGS = {}
def run(self, test):
import trace
tracer = trace.Trace(**self.TRACE_KWARGS)
return tracer.runfunc(unittest.TextTestRunner.run, self, test)
class ProfileTestRunner(unittest.TextTestRunner):
"""Test runner that profiles the test code as it runs
We insert profiling at the test runner level rather than test suite or test
case because both of those can execute code we've written (e.g. setUpClass
and setUp), and we want to profile that code too. It might be unexpectedly
heavy by invoking expensive setup logic.
"""
PROFILE_KWARGS = {}
SORT_STATS_KEYS = ()
def run(self, test):
import cProfile
profiler = cProfile.Profile(**self.PROFILE_KWARGS)
ret = profiler.runcall(unittest.TextTestRunner.run, self, test)
import pstats
stats = pstats.Stats(profiler, stream=sys.stderr)
stats.strip_dirs().sort_stats(*self.SORT_STATS_KEYS).print_stats()
return ret
class TestProgram(unittest.TestProgram):
"""Helper wrapper around unittest.TestProgram
Any passed in kwargs are passed directly down to unittest.main; via this, you
can inject custom argv for example (to limit what tests run).
"""
def __init__(self, **kwargs):
self.default_log_level = kwargs.pop('level', 'critical')
self._leaked_tempdir = None
try:
super(TestProgram, self).__init__(**kwargs)
finally:
if GlobalTestConfig.NETWORK_TESTS_SKIPPED:
print('Note: %i network test(s) skipped; use --network to run them.' %
GlobalTestConfig.NETWORK_TESTS_SKIPPED)
def parseArgs(self, argv):
"""Parse the command line for the test"""
description = """Examples:
%(prog)s - run default set of tests
%(prog)s MyTestSuite - run suite MyTestSuite
%(prog)s MyTestCase.testSomething - run MyTestCase.testSomething
%(prog)s MyTestCase - run all MyTestCase.test* methods
"""
parser = commandline.ArgumentParser(
description=description, default_log_level=self.default_log_level)
# These are options the standard unittest.TestProgram supports.
parser.add_argument('-v', '--verbose', default=False, action='store_true',
help='Verbose output')
parser.add_argument('-q', '--quiet', default=False, action='store_true',
help='Minimal output')
parser.add_argument('-f', '--failfast', default=False, action='store_true',
help='Stop on first failure')
parser.add_argument('tests', nargs='*',
help='specific test classes or methods to run')
# These are custom options we added.
parser.add_argument('-l', '--list', default=False, action='store_true',
help='List all the available tests')
parser.add_argument('--network', default=False, action='store_true',
help='Run tests that depend on good network '
'connectivity')
parser.add_argument('--no-wipe', default=True, action='store_false',
dest='wipe',
help='Do not wipe the temporary working directory '
'(default is to always wipe)')
# Note: The tracer module includes coverage options ...
group = parser.add_argument_group('Tracing options')
group.add_argument('--trace', default=False, action='store_true',
help='Trace test execution')
group.add_argument('--ignore-module', default='',
help='Ignore the specified modules (comma delimited)')
group.add_argument('--ignore-dir', default='',
help='Ignore modules/packages in the specified dirs '
'(comma delimited)')
group.add_argument('--no-ignore-system', default=True, action='store_false',
dest='ignore_system',
help='Do not ignore sys paths automatically')
group = parser.add_argument_group('Profiling options')
group.add_argument('--profile', default=False, action='store_true',
help='Profile test execution')
group.add_argument('--profile-sort-keys', default='time',
help='Keys to sort stats by (comma delimited)')
group.add_argument('--no-profile-builtins', default=True,
action='store_false', dest='profile_builtins',
help='Do not profile builtin functions')
opts = parser.parse_args(argv[1:])
opts.Freeze()
# Process the common options first.
if opts.verbose:
self.verbosity = 2
if opts.quiet:
self.verbosity = 0
if opts.failfast:
self.failfast = True
# Then handle the chromite extensions.
if opts.network:
GlobalTestConfig.RUN_NETWORK_TESTS = True
# We allow --list because it's nice to be able to throw --list onto an
# existing command line to quickly get the output. It's clear to users
# that it does nothing else.
if sum((opts.trace, opts.profile)) > 1:
parser.error('--trace/--profile are exclusive')
if opts.list:
self.testRunner = ListTestRunner
self.testLoader = ListTestLoader()
elif opts.trace:
self.testRunner = TraceTestRunner
# Create the automatic ignore list based on sys.path. We need to filter
# out chromite paths though as we might have automatic local paths in it.
auto_ignore = set()
if opts.ignore_system:
auto_ignore.add(os.path.join(constants.CHROMITE_DIR, 'third_party'))
for path in sys.path:
path = os.path.realpath(path)
if path.startswith(constants.CHROMITE_DIR):
continue
auto_ignore.add(path)
TraceTestRunner.TRACE_KWARGS = {
# Disable counting as it only applies to coverage collection.
'count': False,
# Enable tracing support since that's what we want w/--trace.
'trace': True,
# Enable relative timestamps before each traced line.
'timing': True,
'ignoremods': opts.ignore_module.split(','),
'ignoredirs': set(opts.ignore_dir.split(',')) | auto_ignore,
}
elif opts.profile:
self.testRunner = ProfileTestRunner
ProfileTestRunner.PROFILE_KWARGS = {
'subcalls': True,
'builtins': opts.profile_builtins,
}
ProfileTestRunner.SORT_STATS_KEYS = opts.profile_sort_keys.split(',')
# Figure out which tests the user/unittest wants to run.
if len(opts.tests) == 0 and self.defaultTest is None:
self.testNames = None
elif len(opts.tests) > 0:
self.testNames = opts.tests
else:
self.testNames = (self.defaultTest,)
if not opts.wipe:
# Instruct the TempDirTestCase to skip cleanup before actually creating
# any tempdirs.
self._leaked_tempdir = TempDirTestCase.SkipCleanup()
self.createTests()
def runTests(self):
try:
super(TestProgram, self).runTests()
finally:
if self._leaked_tempdir is not None:
logging.info('Working directory %s left behind. Please cleanup later.',
self._leaked_tempdir)
class main(TestProgram):
"""Chromite's version of unittest.main. Invoke this, not unittest.main."""