Added Identifier to inverted snapshot tests

Example/AccessibilitySnapshot/InvertColorsViewController.swift

@@ -27,6 +27,18 @@ final class InvertColorsViewController: AccessibilityViewController {
 
     private var notificationObserver: AnyObject?
 
+    // MARK: - Life Cycle
+
+    init() {
+        super.init(nibName: nil, bundle: nil)
+
+        updateStatusLabel()
+    }
+
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
     // MARK: - UIViewController
 
     override func viewDidLoad() {

Example/SnapshotTests/InvertColorsTests.swift

@@ -28,4 +28,17 @@ final class InvertColorsTests: SnapshotTestCase {
         SnapshotVerifyWithInvertedColors(viewController.view)
     }
 
+    func testInvertColorsWithIdentifier() {
+        let viewController = InvertColorsViewController()
+        viewController.view.frame = UIScreen.main.bounds
+
+        FBSnapshotVerifyView(viewController.view, identifier: "originalColors")
+
+        SnapshotVerifyWithInvertedColors(viewController.view, identifier: "invertedColors")
+
+        // Ensures the view has not been modified after calling SnapshotVerifyWithInvertedColors
+        FBSnapshotVerifyView(viewController.view, identifier: "originalColors")
+
+    }
+
 }

Sources/AccessibilitySnapshot/iOSSnapshotTestCase/FBSnapshotTestCase+Accessibility.swift

@@ -167,7 +167,7 @@ extension FBSnapshotTestCase {
         }
 
         let imageView = UIImageView(image: image)
-        FBSnapshotVerifyView(imageView, file: file, line: line)
+        FBSnapshotVerifyView(imageView, identifier: identifier, file: file, line: line)
 
         statusUtility.unmockStatuses()
         postNotification()