}
    }

    def formatsSuccessRateWhenNoTests() {
        expect:
        results.successRate == null
        results.formattedSuccessRate == "-"
    }

    def formatsSuccessRateWhenAllTestsPass() {
        results.addTest(test())

        expect:
        results.successRate == 100
        results.formattedSuccessRate == '100%'
    }

    def formatsSuccessRateWhenSomeTestsFail() {