}

  public void testChecksForNull() throws Exception {
    NullPointerTester tester = new NullPointerTester();

    tester.testAllPublicInstanceMethods(new HashingInputStream(Hashing.md5(), buffer));
    tester.testAllPublicStaticMethods(HashingInputStream.class);
    tester.testAllPublicConstructors(HashingInputStream.class);
  }

	for i, test := range tests {
		t.Run(fmt.Sprintf("test-%d", i+1), func(t *testing.T) {
			err := test.sizeFilter.Validate()
			if err != nil {
				gotErr := err.(BatchJobYamlErr)
				testErr := test.err.(BatchJobYamlErr)
				if gotErr.message() != testErr.message() {
					t.Fatalf("Expected %v but got %v", test.err, err)
				}
			}
			if err == nil && test.err != nil {
				t.Fatalf("Expected %v but got nil", test.err)
			}
		})

        });
    for (Method method : methods) {
      if (method.isAnnotationPresent(TestSubtype.class)) {
        method.setAccessible(true);
        SubtypeTester tester = (SubtypeTester) clone();
        tester.method = method;
        method.invoke(tester, new Object[] {null});
      }
    }
  }

  private Type getOnlyParameterType() {
    assertThat(method.getGenericParameterTypes()).hasLength(1);

  }

  // Basic tests

  @J2ktIncompatible
  @GwtIncompatible // NullPointerTester
  public void testNullPointers() {
    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicStaticMethods(ImmutableList.class);
    tester.testAllPublicInstanceMethods(ImmutableList.of(1, 2, 3));
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester
  public void testSerialization_empty() {

	// 0 is invalid.
	for _, max := range []int{1, 2, 10, 123} {
		inrange := Intn(max)
		if inrange < 0 || inrange > max {
			t.Errorf("%v out of range (0,%v)", inrange, max)
		}
	}
}

func TestPerm(t *testing.T) {
	Seed(5)
	rand.Seed(5)
	for i := 1; i < 20; i++ {
		actual := Perm(i)
		expected := rand.Perm(i)
		for j := 0; j < i; j++ {
			if actual[j] != expected[j] {

    private final transient ClassSanityTester tester;

    SerializableDummyProxy(ClassSanityTester tester) {
      this.tester = tester;
    }

    @Override
    <R> R dummyReturnValue(TypeToken<R> returnType) {
      return tester.getDummyValue(returnType);
    }

    @Override
    public boolean equals(@Nullable Object obj) {

	flag.BoolVar(&t.json, "json", false, "report test results in JSON")

	xflagparse(-1) // any number of args
	if noRebuild {
		t.rebuild = false
	}

	t.run()
}

// tester executes cmdtest.
type tester struct {
	race        bool
	msan        bool
	asan        bool
	listMode    bool
	rebuild     bool
	failed      bool
	keepGoing   bool

      fail();
    } catch (UnsupportedOperationException expected) {
    }
  }

  @GwtIncompatible
  @J2ktIncompatible
  public void testNullPointerExceptions() {
    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicStaticMethods(Primitives.class);
  }

  public void testStringConverter_nullPointerTester() throws Exception {
    Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);
    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicInstanceMethods(converter);
  }

  @GwtIncompatible // stringConverter
  public void testStringConverter_nullConversions() {

  public void testNullPointers() {
    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicStaticMethods(Joiner.class);
    tester.testInstanceMethods(Joiner.on(","), NullPointerTester.Visibility.PACKAGE);
    tester.testInstanceMethods(Joiner.on(",").skipNulls(), NullPointerTester.Visibility.PACKAGE);
    tester.testInstanceMethods(