}

    void assertWrapperFilesGenerated(String gradleVersion, TestFile parentFolder = rootDir) {
        new WrapperTestFixture(parentFolder).generated(gradleVersion)
    }

    void assertGradleFilesNotGenerated(TestFile parentFolder = rootDir) {
        getBuildFile(parentFolder).assertDoesNotExist()
        getSettingsFile(parentFolder).assertDoesNotExist()

        File executable = new File(javaCommand);
        File parentFolder = executable.getParentFile();
        if(parentFolder == null || !parentFolder.exists()) {
            Exception cause = new NoSuchFileException(javaCommand);
            throw new ExecException("A problem occurred starting process 'command '" + javaCommand + "''", cause);
        }
        return getVersionFromJavaHome(parentFolder.getParentFile());
    }