def distDir = userHomeDir.file("wrapper/dists/${FilenameUtils.getBaseName(distribution.binDistribution.absolutePath)}").assertIsDir()
        assert distDir.listFiles().length == 1
        distDir.listFiles()[0].file("gradle-${distribution.version.baseVersion.version}").assertIsDir()
    }

    void prepareWrapper(URI distributionUri = distribution.binDistribution.toURI(), Action<GradleExecuter> action = Actions.doNothing()) {

        server.expect(server.get("/$TEST_DISTRIBUTION_URL")
            .expectUserAgent(matchesNameAndVersion("gradlew", Download.UNKNOWN_VERSION))
            .sendFile(distribution.binDistribution))

        when:
        result = wrapperExecuter.withTasks('hello').run()

        then:

        sha256().hashFile(distribution.binDistribution).toZeroPaddedString(sha256().hexDigits)
    }

    def "wrapper preserves new checksum if it was provided in properties"() {
        given:
        configureServer(false)
        def releasedDistribution = IntegrationTestBuildContext.INSTANCE.distribution("7.5")
        prepareWrapper(releasedDistribution.binDistribution.toURI())

        and:

        server.expect(server.get(GRADLE_BIN_ZIP).sendFile(badArchive))
        server.expect(server.get(GRADLE_BIN_HASH).missing())
        server.expect(server.get(GRADLE_BIN_ZIP).sendFile(distribution.binDistribution))
        server.start()

        prepareWrapperWithGradleBin()

        when:
        def success = wrapperExecuter.run()

        then:
        assertSucces(success)
    }

    @Rule BlockingHttpServer server = new BlockingHttpServer()

    def setup() {
        server.expect(server.head("/gradle-bin.zip"))
        server.expect(server.get("/gradle-bin.zip").sendFile(distribution.binDistribution))
        server.start()
    }

    @Issue("https://issues.gradle.org/browse/GRADLE-2699")
    def "concurrent downloads do not stomp over each other"() {
        given:

        given: "malformed distribution"
        // Repackage distribution with bin/gradle removed so permissions cannot be set
        TestFile tempUnzipDir = temporaryFolder.createDir("temp-unzip")
        distribution.binDistribution.unzipTo(tempUnzipDir)
        assert tempUnzipDir.file("gradle-${distribution.version.baseVersion.version}", "bin", "gradle").delete()
        TestFile tempZipDir = temporaryFolder.createDir("temp-zip-foo")

    def "can run in project with a \$ in the path"() {
        given:
        def projectDir = file('foo$bar-baz')
        projectDir.mkdirs()
        prepareWrapper(distribution.binDistribution.toURI()) {
            it.inDirectory(projectDir)
        }
        projectDir.file("build.gradle") << """
            task assertProjectDirHasMeta {
                def dirName = provider { projectDir.name }

        TestFile superGradleHome = super.getGradleHomeDir()

        if (!superGradleHome.isDirectory() || superGradleHome.listFiles({ it.isDirectory() } as FileFilter).size() == 0) {
            super.binDistribution.usingNativeTools().unzipTo(superGradleHome)
        }
        return new TestFile(superGradleHome.listFiles({ it.isDirectory() } as FileFilter).first())
    }

    static boolean isCommitDistribution(String version) {

        buildFile << """
task wrapper (type: Wrapper, overwrite: true) {
    gradleVersion = '$executionVersion.version.version'
    distributionUrl = '${executionVersion.binDistribution.toURI()}'
}

println "using Java version \${System.getProperty('java.version')}"

task hello {
    doLast {
        println "hello from \$gradle.gradleVersion"

        return optionalFile("integTest.normalizedDistribution");
    }

    @Nullable
    public TestFile getBinDistribution() {
        return optionalFile("integTest.binDistribution");
    }

    @Nullable
    public TestFile getAllDistribution() {
        return optionalFile("integTest.allDistribution");
    }

    @Nullable
    public TestFile getDocsDistribution() {