/**
     * Returns the result for the first test class whose name starts with the given string.
     */
    TestClassExecutionResult testClassStartsWith(String testClass);

    int getTotalNumberOfTestClassesExecuted();

    boolean testClassExists(String testClass);

    boolean testClassDoesNotExist(String testClass);

        def matching = findTestClassStartsWith(testClass)
        return new JUnitTestClassExecutionResult(matching[1], matching[0], matching[0], outputAssociation)
    }

    @Override
    int getTotalNumberOfTestClassesExecuted() {
        return findClasses().size()
    }

    private def findTestClass(String testClass) {
        def classes = findClasses()
        assertThat(classes.keySet(), hasItem(testClass))

        def matching = findTestClassStartsWith(testClass)
        return new TestNgTestClassExecutionResult(matching.key, matching.value)
    }

    @Override
    int getTotalNumberOfTestClassesExecuted() {
        return getExecutedTestClasses().size()
    }

    private void parseResults() {
        resultsXml = new XmlSlurper().parse(xmlReportFile().assertIsFile())
    }

    }

    void assertNoTestClassesExecuted() {
        assert totalNumberOfTestClassesExecuted == 0
    }

    @Override
    int getTotalNumberOfTestClassesExecuted() {
        assert !results.isEmpty()
        def firstResult = results[0].totalNumberOfTestClassesExecuted
        assert results.every { firstResult == it.totalNumberOfTestClassesExecuted }

        return new HtmlTestClassExecutionResult(new File(htmlReportDirectory, "classes").listFiles().find { it.name.startsWith(FileUtils.toSafeFileName(testClass)) })
    }

    @Override
    int getTotalNumberOfTestClassesExecuted() {
        return getExecutedTestClasses().size()
    }

    private static class HtmlTestClassExecutionResult implements TestClassExecutionResult {
        private String classDisplayName