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.
    }
}

}

​

​

第一次在recordMode = true的情况下运行，然后在没有此行的情况下运行，仍然得到快照比较失败

(vc是好的，红色背景，而不是nil )

​

​

Answer 1

在尝试之后，我创建了另一种自动定义这些文件夹的方法，即创建我自己的基类：

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
  }
}