StringWithoutPostfixTest.testStringNullWithNullPostfixFail: String 'referenceA'(null) does NOT have postfix(null). StringWithoutPostfixTest.testStringNullWithEmptyPostfixFail: String 'referenceA'(null) does NOT have postfix(). StringWithoutPostfixTest.testStringNonEmptyWithNullPostfixFail: String 'referenceA'(okay) does NOT have postfix(null). StringWithoutPostfixTest.testStringNonEmptyWithNonMatchingPostfixFailMessage: String 'referenceA'(okay) does NOT have postfix(xyz). addition info. StringWithoutPostfixTest.testStringEmptyWithNullPostfixFail: String 'referenceA'() does NOT have postfix(null).