}

    TestFile addSnapshotInWatchableHierarchy(TestFile projectRootDirectory) {
        def fileInside = directoryContainingSnapshot(projectRootDirectory).file("file.txt").createFile()
        addSnapshot(snapshotRegularFile(fileInside))
        return fileInside.parentFile
    }

    TestFile directoryContainingSnapshot(TestFile projectRootDirectory) {
        projectRootDirectory.file("some/subdir")
    }