add UI test

BeeSwift/AppDelegate.swift

@@ -17,6 +17,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterD
     var window: UIWindow?
 
     func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
+        resetStateIfUITesting()
 
         UINavigationBar.appearance().titleTextAttributes = [NSAttributedStringKey.font :
             UIFont.beeminder.defaultFontPlain.withSize(20)]
@@ -148,4 +149,10 @@ class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterD
             completionHandler([.alert, .sound, .badge])
         }
     }
+
+    private func resetStateIfUITesting() {
+        if ProcessInfo.processInfo.arguments.contains("UI-Testing") {
+            UserDefaults.standard.removePersistentDomain(forName: Bundle.main.bundleIdentifier!)
+        }
+    }
 }

BeeSwift/BeeSwiftUITests/LaunchScreenTests.swift

@@ -10,10 +10,18 @@ import XCTest
 class LaunchScreenTests: XCTestCase {
 
     static var app: XCUIApplication?
+    var userDefaults: UserDefaults?
+    let userDefaultsSuiteName = "TestDefaults"
 
     override func setUp() {
         super.setUp()
+        UserDefaults().removePersistentDomain(forName: userDefaultsSuiteName)
+        userDefaults = UserDefaults(suiteName: userDefaultsSuiteName)
+        if let appDomain = Bundle.main.bundleIdentifier {
+            UserDefaults.standard.removePersistentDomain(forName: appDomain)
+        }
         let app = XCUIApplication()
+        app.launchArguments += ["UI-Testing"]
         app.launch()
     }
 
@@ -30,12 +38,4 @@ class LaunchScreenTests: XCTestCase {
         XCTAssertTrue(app.buttons["Sign In"].exists)
         XCTAssertTrue(app.textFields["Email or username"].exists)
     }
-
-    func testPerformanceExample() {
-        // This is an example of a performance test case.
-//        self.measure() {
-//            // Put the code you want to measure the time of here.
-//        }
-    }
-
 }

BeeSwift/CurrentUserManager.swift

@@ -156,6 +156,7 @@ class CurrentUserManager : NSObject {
 
     func fetchGoals(success: ((_ goals : [JSONGoal]) -> ())?, error: ((_ error : Error?, _ errorMessage : String?) -> ())?) {
         guard let username = self.username else {
+            CurrentUserManager.sharedManager.signOut()
             success?([])
             return
         }