new TestFileHelper(this).tgzTo(tarFile, readOnly);
        return this;
    }

    public TestFile tbzTo(TestFile tarFile) {
        return tbzTo(tarFile, false);
    }

    public TestFile tbzTo(TestFile tarFile, boolean readOnly) {
        new TestFileHelper(this).tbzTo(tarFile, readOnly);
        return this;
    }

    TestFile getSha512File(TestFile file) {
        getHashFile(file, Hashing.sha512())
    }

    TestFile sha512File(TestFile file) {
        hashFile(file, Hashing.sha512())
    }

    TestFile getMd5File(TestFile file) {
        getHashFile(file, Hashing.md5())
    }

    TestFile md5File(TestFile file) {
        hashFile(file, Hashing.md5())
    }

        }
        return new ReleasedGradleDistribution(version, previousVersionDir.file(version));
    }

    protected static TestFile file(String propertyName, String defaultPath) {
        TestFile testFile = optionalFile(propertyName);
        if (testFile != null) {
            return testFile;
        }
        if (defaultPath == null) {

                }
            }
        """
    }

    TestFile getCacheDir() {
        cacheDir
    }

    TestFile gcFile() {
        cacheDir.file("gc.properties")
    }

    List<TestFile> listCacheTempFiles() {
        cacheDir.listFiles().findAll { it.name.endsWith(BuildCacheTempFileStore.PARTIAL_FILE_SUFFIX) }.sort()
    }

    List<TestFile> listCacheFailedFiles() {

                "public class DepClass { }"
        );
        builder.buildJar(testFile("repo/test-1.3.jar"));

        testFile("buildSrc/build.gradle").writelns(
                "repositories { flatDir { dirs '../repo' } }",
                "dependencies { implementation name: 'test', version: '1.3' }");
        testFile("buildSrc/src/main/java/BuildClass.java").writelns("public class BuildClass extends org.gradle.test.DepClass { }");

import org.gradle.test.fixtures.file.TestFile

class M2Installation implements Action<GradleExecuter> {
    private final TestDirectoryProvider temporaryFolder
    private boolean initialized = false
    private TestFile userHomeDir
    private TestFile userM2Directory
    private TestFile userSettingsFile
    private TestFile globalMavenDirectory
    private TestFile globalSettingsFile

        }
    }

    static interface Scenario {

        void setup(AbstractIntegrationSpec spec)

        void createInitialBuildLayoutIn(TestFile dir, ScriptLanguage scriptLanguage)

        TestFile addMissingScript(TestFile dir, ScriptLanguage scriptLanguage)

        String getDisplayName(String scriptExtension)
    }

    static class MissingBuild implements Scenario {

        INIT,
        BUILDSRC_PROJECT,
        BUILDSRC_SETTINGS,
    }

    final TestFile projectDir
    final TestFile scriptFile
    final List<String> buildArguments
    final String expectedOutputBeforeChange = 'Hello!'
    final String expectedOutputAfterChange = 'Hi!'

    ScriptChangeFixture(TestFile projectDir, TestFile scriptFile, List<String> buildArguments) {
        this.projectDir = projectDir

        private final ScriptLanguage scriptLanguage

        private final List<TestFile> excludedFiles = new ArrayList<>()

        private final List<TestFile> excludedFilesCopies = new ArrayList<>()

        private final List<TestFile> includedFiles = new ArrayList<>()

        private final List<TestFile> includedFilesCopies = new ArrayList<>()

    }

    @Test
    public void canDetermineRootProjectAndDefaultProjectBasedOnBuildFile() {
        testFile("settings.gradle").write("include('child')");

        TestFile rootBuildFile = testFile("build.gradle");
        rootBuildFile.write("task('do-stuff')");

        TestFile childBuildFile = testFile("child/build.gradle");
        childBuildFile.write("task('do-stuff')");