如何为 AVPlayer 编写单元测试用例？

Question

We are using AVPlayer and playing DRM Protected content using fairplay approach.

Now it's time for writing Unit Test cases for the player. I know how to write unit test cases to check API calls, functionality check etc.

But I'm not able to figure out what are the test cases I can write for AVPlayer to check the player functionality, content quality, audio and video output checks.

I would like to know is it possible to write Unit test cases for a Player ? if yes, what will be the better way of doing it ??

Answer 1

Any code you write should/can be tested, it may not make much sense to test the audio but in projects with many collaborators, someone can at some point make a change and crashing the application the tests would help you to see that. I had the same thoughts as you before I had to write the test cases and that led me to find your question here. I wrote test cases where I needed to test my project's audio layer. It may not make much sense, but if you need to present a 100% tested code, it is valid.

It's a simple example.

import XCTest

class AudioPlayerTests: XCTest {

    let audioManager = AudioManager()

    func test_AudioManager_PlaySound() { 
        audioManager.playSound(named: .background, numberOfLoop: 0, volume: 1)
        XCTAssertNotNil(audioManager.audioPlayer)
        XCTAssertEqual(audioManager.audioPlayer!.numberOfLoops, 0)
        XCTAssertEqual(audioManager.audioPlayer!.volume, 1)
        XCTAssertTrue(audioManager.audioPlayer!.isPlaying)
    }

    func test_getaudio() {
        audioManager.playSound(named: .effectOne)
        let sut = audioManager.getSKAudioNode(.background)
        XCTAssertNotNil(sut)
    }
}