class UnionFileCollectionTest extends Specification {
    def file1 = new File("1")
    def file2 = new File("2")
    def file3 = new File("3")

    private UnionFileCollection newUnionFileCollection(FileCollectionInternal... source) {
        new UnionFileCollection(TestFiles.taskDependencyFactory(), source)
    }

    def containsUnionOfAllSourceCollections() {