expect:
        def path = factory.relativePath('ROOT_DIR', tmpDir.file('a/b'))
        path.url == 'file://$ROOT_DIR$/a/b'
        path.relPath == '$ROOT_DIR$/a/b'
    }

    def createsRelativePathForAnAncestorOfRootDir() {
        factory.addPathVariable('ROOT_DIR', tmpDir.testDirectory)

        expect:
        def path = factory.relativePath('ROOT_DIR', tmpDir.testDirectory.parentFile.parentFile.file('a/b'))