@Test
  public void detectMutableStateInt() {
    EqualsVerifier<MutableIntContainer> ev = EqualsVerifier.forClass(MutableIntContainer.class);
    assertFailure(ev, MUTABILITY, FIELD_NAME);

    EqualsVerifier.forClass(MutableIntContainer.class).suppress(Warning.NONFINAL_FIELDS).verify();
  }
  @Test
  public void secondMutableFieldUsed() {
    EqualsVerifier<SecondMutableFieldUsed> ev =
        EqualsVerifier.forClass(SecondMutableFieldUsed.class);
    assertFailure(ev, MUTABILITY, "second");

    EqualsVerifier.forClass(SecondMutableFieldUsed.class)
        .suppress(Warning.NONFINAL_FIELDS)
        .verify();
  }
 @Test
 public void referenceAndSuperSameHaveSameHashCode() {
   EqualsVerifier<HashCodeBrokenPoint> ev = EqualsVerifier.forClass(HashCodeBrokenPoint.class);
   assertFailure(
       ev,
       "Superclass",
       "hashCode for",
       HashCodeBrokenPoint.class.getSimpleName(),
       "should be equal to hashCode for superclass instance",
       Point.class.getSimpleName());
 }
 @Test
 public void symmetry() {
   EqualsVerifier<SymmetryBrokenColorPoint> ev =
       EqualsVerifier.forClass(SymmetryBrokenColorPoint.class);
   assertFailure(
       ev,
       "Symmetry",
       SymmetryBrokenColorPoint.class.getSimpleName(),
       "does not equal superclass instance",
       Point.class.getSimpleName());
 }
 @Test
 public void transitivity() {
   EqualsVerifier<TransitivityBrokenColorPoint> ev =
       EqualsVerifier.forClass(TransitivityBrokenColorPoint.class);
   assertFailure(
       ev,
       "Transitivity",
       "TransitivityBrokenColorPoint:1,1,YELLOW\nand\n  TransitivityBrokenColorPoint:1,1,BLUE",
       "both equal superclass instance",
       "Point:1,1",
       "which implies they equal each other.");
 }
 @Test
 public void mutableFieldNotUsed() {
   EqualsVerifier.forClass(MutableFieldNotUsed.class).verify();
 }
 @Test
 public void emptySuperclassIsIrrelevantWhenTheresEqualsHigherUp() {
   EqualsVerifier<BrokenCanEqualColorPointWithEmptySuper> ev =
       EqualsVerifier.forClass(BrokenCanEqualColorPointWithEmptySuper.class);
   assertFailure(ev, "Symmetry", BrokenCanEqualColorPointWithEmptySuper.class.getSimpleName());
 }
 @Test
 public void emptySuperclassesShouldNotFailOnEqualSuperclassInstance() {
   EqualsVerifier.forClass(SubclassOfEmpty.class).verify();
   EqualsVerifier.forClass(SubOfEmptySubOfEmpty.class).verify();
   EqualsVerifier.forClass(SubOfEmptySubOfAbstract.class).verify();
 }
 @Test
 public void happyPath() {
   EqualsVerifier.forClass(ColorBlindColorPoint.class).verify();
 }
 @Test
 public void toStringThrowsIllegalStateExceptionWhenFieldIsNull() {
   EqualsVerifier<ToStringIllegalStateThrower> ev =
       EqualsVerifier.forClass(ToStringIllegalStateThrower.class);
   assertFailure(ev, TO_STRING, THROWS, ILLEGAL_STATE_EXCEPTION, WHEN_S_IS_NULL);
 }
 @Test
 public void hashCodeThrowsIllegalStateExceptionWhenFieldIsNull() {
   EqualsVerifier<HashCodeIllegalStateThrower> ev =
       EqualsVerifier.forClass(HashCodeIllegalStateThrower.class);
   assertFailure(ev, HASH_CODE, THROWS, ILLEGAL_STATE_EXCEPTION, WHEN_S_IS_NULL);
 }
 @Test
 public void equalsThrowsIllegalStateExceptionWhenFieldIsNull() {
   EqualsVerifier<EqualsIllegalStateThrower> ev =
       EqualsVerifier.forClass(EqualsIllegalStateThrower.class);
   assertFailure(ev, EQUALS, THROWS, ILLEGAL_STATE_EXCEPTION, WHEN_S_IS_NULL);
 }
 @Test
 public void issue31() {
   EqualsVerifier<Issue31> ev = EqualsVerifier.forClass(Issue31.class);
   assertFailure(ev, TO_STRING, THROWS, ILLEGAL_FORMAT_CONVERSION_EXCEPTION, WHEN_RED_IS_NULL);
 }