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}).