StringNotMatchingTest.testStringNonEmptyWithNullSubstringFail: String 'referenceA'(okay) is NOT a match(null). StringNotMatchingTest.testStringNonEmptyWithEmptySubstringFail: String 'referenceA'(okay) is NOT a match(). StringNotMatchingTest.testStringEmptyWithNullSubstringFail: String 'referenceA'() is NOT a match(null). StringNotMatchingTest.testStringNullWithEmptySubstringFail: String 'referenceA'(null) is NOT a match(). StringNotMatchingTest.testStringNullWithNullSubstringNoFail: String 'referenceA'(null) is NOT a match(null). StringNotMatchingTest.testStringNonEmptyWithNonMatchingSubstringFail: String 'referenceA'(okay) is NOT a match([cayo]{4}).