test/script/basic/JDK-8068573.js

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/**
 * JDK-8068573: POJO setter using [] syntax throws an exception
 *
 * @test
 * @run
 */

// Invoke a setter using []. It's important that the setter returns void.
var pb = new (Java.type("jdk.nashorn.test.models.PropertyBind"))
var n = "writeOnly";
pb[n] = 2;
Assert.assertEquals(pb.peekWriteOnly(), 2);

// Invoke an overloaded setter using []. It's important that one of the 
// overloads returns void.
var os = new (Java.type("jdk.nashorn.test.models.OverloadedSetter"))
var n2 = "color";
os[n2] = 3; // exercise int overload
Assert.assertEquals(os.peekColor(), "3");
os[n2] = "blue";  // exercise string overload
Assert.assertEquals(os.peekColor(), "blue");
for each(var x in [42, "42"]) {
  os[n2] = x; // exercise both overloads in the same call site
  Assert.assertEquals(os.peekColor(), "42");
}

// Invoke an overloaded method using [], repeatedly in the same call 
// site. It's important that one of the overloads returns void.
var n3="foo";
var param=["xyz", 1, "zyx", 2];
var expected=["boo", void 0, "boo", void 0];
for(var i in param) {
  Assert.assertEquals(os[n3](param[i]), expected[i]);
}