比较无包力选项的阵列

I'm writing a test:

我正在写一个测试:

    func test_arrayFromShufflingArray() {

        var videos = [MockObjects.mockVMVideo_1(), MockObjects.mockVMVideo_2(), MockObjects.mockVMVideo_3()]
        let tuple = ShuffleHelper.arrayFromShufflingArray(videos, currentIndex:1)

        var shuffledVideos = tuple.0
        let shuffleIndexMap = tuple.1


        // -- test order is different
        XCTAssert(videos != shuffledVideos, "test_arrayFromShufflingArray fail")
    }
    func test