decoder.readBytes(new byte[4])
        }

        then:
        thrown(EOFException)

        when:
        decode(bytes) { Decoder decoder ->
            decoder.readBytes(new byte[10], 0, 5)
        }

        then:
        thrown(EOFException)

        when:
        decode(bytes) { Decoder decoder ->
            decoder.readBytes(new byte[3], 0, 3)

    GradleModuleMetadata(TestFile file) {
        file.withReader { r ->
            JsonReader reader = new JsonReader(r)
            values = readObject(reader)
        }
        assert values.formatVersion == '1.1'
        assert values.createdBy.gradle.version == GradleVersion.current().version
        variants = (values.variants ?: []).collect { new Variant(it.name, it) }
    }

    @Nullable
    CreatedBy getCreatedBy() {

        if (!gradle.isRunning()) {
            throw new UnexpectedBuildFailure("Gradle has exited")
        }
        waitForBuild()
        throwOnBuildFailure()
        result
    }

    private void throwOnBuildFailure() {
        if (result instanceof ExecutionFailure) {
            throw new UnexpectedBuildFailure("""build was expected to succeed but failed:
-- STDOUT --

    }

    void assumeShouldRun() {
        if (testId == null) {
            throw new IllegalStateException("Test id has not been specified")
        }
        if (testProject == null) {
            throw new IllegalStateException("Test project has not been specified")
        }
        if (workingDir == null) {
            throw new IllegalStateException("Working directory has not been specified")
        }

        metadata.extraAttributes.get(new NamespaceId("http://ant.apache.org/ivy/extra", "someExtra")) == "56576"

        metadata.configurationDefinitions.size() == 5
        assertConf("myconf1", "desc 1", true, new String[0])
        assertConf("myconf2", "desc 2", true, new String[0])
        assertConf("myconf3", "desc 3", false, new String[0])

            .visualCppVersion(VersionNumber.parse(cppVersion))
            .version(VersionNumber.parse(version))
            .build()
    }

    VisualStudioInstallCandidate vs2017Install(File installDir, String version) {
        return new VisualStudioMetadataBuilder()
            .installDir(installDir)
            .visualCppDir(new File(installDir, "VC/Tools/MSVC/1.2.3.4"))

        return "new MemoryUsage(${fromMB(initial)}, ${fromMB(used)}, ${fromMB(used)}, ${fromMB(max)})"
    }

    static List<GarbageCollectorUnderTest> getGarbageCollectors() {
        if (JavaVersion.current().isCompatibleWith(VERSION_14)) {
            return [
                new GarbageCollectorUnderTest(ORACLE_SERIAL9, ORACLE_SERIAL),

    def testFrameworkMock = Mock(TestFramework)

    private FileCollection classpathMock = TestFiles.fixed(new File("classpath"))
    private Test test

    def setup() {
        classesDir = temporaryFolder.createDir("classes")
        File classfile = new File(classesDir, "FileTest.class")
        FileUtils.touch(classfile)
        resultsDir = temporaryFolder.createDir("testResults")

        "TransformBackedProvider" | { p, m -> new TransformBackedProvider(null, p, m) }
        "MappingProvider"         | { p, m -> new MappingProvider(Integer, p, m) }
    }

    def "runs the side effect when changing provider is filtered with #description and spec is satisfied"() {
        given:
        def sideEffect = Mock(ValueSupplier.SideEffect)
        def counter = new AtomicInteger(23)

        Set<List<BuildWithSystemPropertyDefined>> containsIncludedBuildDefinitions = new LinkedHashSet<>()

        Set<List<BuildWithSystemPropertyDefined>> allDefinitions = [
            new RootBuild() as BuildWithSystemPropertyDefined,
            new BuildSrc(),
            new IncludedBuild("included-build")
        ]
            .subsequences()
            .collect { definitions ->