this.provider = null
        this.rootDir = rootDir
    }

    TestFile getRootDir() {
        return rootDir ?: provider.testDirectory
    }

    BuildTestFixture withBuildInRootDir() {
        buildInRootDir = true
        this
    }

    BuildTestFixture withBuildInSubDir() {
        buildInRootDir = false
        this
    }

    }

    TestFile singleProjectBuildInRootFolder(String projectName, @DelegatesTo(BuildTestFile) Closure cl = {}) {
        new BuildTestFixture(projectDir).withBuildInRootDir().singleProjectBuild(projectName, cl)
    }

    TestFile multiProjectBuildInSubFolder(String projectName, List<String> subprojects, @DelegatesTo(BuildTestFile) Closure cl = {}) {

        temporaryFolder.testDirectory
    }

    BuildTestFile singleProjectBuildInRootDir(String projectName, @DelegatesTo(BuildTestFile) Closure cl = {}) {
        new BuildTestFixture(projectDir).withBuildInRootDir().singleProjectBuild(projectName, cl)
    }

    BuildTestFile singleProjectBuildInSubDir(String projectName, @DelegatesTo(BuildTestFile) Closure cl = {}) {