ios - FBSnapshotTestCase 不会创建 FB_REFERENCE_IMAGE_DIR 和 IMAGE_DIFF_DIR 文件夹

Question

这是我的测试：

类 ZabiTests：FBSnapshotTestCase {

var vc:UIViewController?
override func setUpWithError() throws {
    super.setUp()
    vc = ViewController()
   recordMode = true
}

override func tearDownWithError() throws {
    // Put teardown code here. This method is called after the invocation of each test method in the class.
}

func testExample() throws {
  FBSnapshotVerifyView((vc?.view)!)
}

func testPerformanceExample() throws {
    // This is an example of a performance test case.
    self.measure {
        // Put the code you want to measure the time of here.
    }
}

}

我第一次使用 recordMode = true 运行，然后我在没有此行的情况下运行，但我仍然得到快照比较失败

（vc 是好的，红色背景而不是 nil ）

Answer 1

在玩弄它之后，我创建了一种通过创建自己的基类来自动定义这些文件夹的替代方法：

open class MySnapshotTestCase: FBSnapshotTestCase {
  var referenceImageDirectory: String?
  var imageDiffDirectory: String?


  public func verify(
      view: UIView,
      file: StaticString = #file,
      line: UInt = #line
  ) {

    let directory = ("\(file)" as NSString).deletingLastPathComponent

    // Save for later use in getReferenceImageDirectory
    referenceImageDirectory = NSString.path(withComponents: [directory, "ReferenceImages"])

    // Save for later use in getImageDiffDirectory
    imageDiffDirectory = NSString.path(withComponents: [directory, "FailedSnapshotTests"])

    FBSnapshotVerifyView(
        view,
        identifier: nil,
        perPixelTolerance: 0,
        overallTolerance: 0,
        file: file,
        line: line)
  }

  open override func getReferenceImageDirectory(withDefault dir: String?) -> String {
    guard let referenceImageDirectory = referenceImageDirectory else {
      fatalError("Do not call FBSnapshotVerifyView directly, use WazeSnapshotTestCase.verify instead.")
    }
    return referenceImageDirectory
  }

  open override func getImageDiffDirectory(withDefault dir: Swift.String?) -> Swift.String {
    guard let imageDiffDirectory = imageDiffDirectory else {
      fatalError("Do not call FBSnapshotVerifyView directly, use WazeSnapshotTestCase.verify instead.")
    }
    
    return imageDiffDirectory
  }
}