FlutterPluginAppLifeCycleDelegateTest.mm

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#import <OCMock/OCMock.h>
#import <XCTest/XCTest.h>
 
#import "flutter/shell/platform/darwin/common/framework/Headers/FlutterMacros.h"
#import "flutter/shell/platform/darwin/ios/framework/Headers/FlutterPluginAppLifeCycleDelegate.h"
#import "flutter/shell/platform/darwin/ios/framework/Headers/FlutterSceneLifeCycle.h"
#import "flutter/shell/platform/darwin/ios/framework/Source/FlutterPluginAppLifeCycleDelegate_internal.h"
#import "flutter/shell/platform/darwin/ios/framework/Source/FlutterSharedApplication.h"
 
FLUTTER_ASSERT_ARC
 
// --- Test Category to avoid modifying the original production source code ---
@interface FlutterPluginAppLifeCycleDelegate (TestUtils)
- (void)removeDelegate:(NSObject<FlutterApplicationLifeCycleDelegate>*)delegate;
@end
 
@implementation FlutterPluginAppLifeCycleDelegate (TestUtils)
- (void)removeDelegate:(NSObject<FlutterApplicationLifeCycleDelegate>*)delegate {
  // Access the private _delegates member via Key-Value Coding (KVC)
  NSPointerArray* delegates = [self valueForKey:@"_delegates"];
  for (NSUInteger i = 0; i < delegates.count; i++) {
    if ([delegates pointerAtIndex:i] == (__bridge void*)delegate) {
      [delegates removePointerAtIndex:i];
      break;
    }
  }
}
@end
// -----------------------------------------------------------------------
 
@protocol TestFlutterPluginWithSceneEvents <NSObject,
                                            FlutterApplicationLifeCycleDelegate,
                                            FlutterSceneLifeCycleDelegate>
@end
 
@interface FakeTestFlutterPluginWithSceneEvents : NSObject <TestFlutterPluginWithSceneEvents>
@end
 
@implementation FakeTestFlutterPluginWithSceneEvents
- (BOOL)application:(UIApplication*)application
    didFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
  return NO;
}
 
- (BOOL)application:(UIApplication*)application
            openURL:(NSURL*)url
            options:(NSDictionary<UIApplicationOpenURLOptionsKey, id>*)options {
  return YES;
}
 
- (BOOL)application:(UIApplication*)application
    continueUserActivity:(NSUserActivity*)userActivity
      restorationHandler:(void (^)(NSArray*))restorationHandler {
  return YES;
}
 
- (BOOL)application:(UIApplication*)application
    performActionForShortcutItem:(UIApplicationShortcutItem*)shortcutItem
               completionHandler:(void (^)(BOOL succeeded))completionHandler
    API_AVAILABLE(ios(9.0)) {
  return YES;
}
@end
 
@interface FakePlugin : NSObject <FlutterApplicationLifeCycleDelegate>
@end
 
@implementation FakePlugin
- (BOOL)application:(UIApplication*)application
            openURL:(NSURL*)url
            options:(NSDictionary<UIApplicationOpenURLOptionsKey, id>*)options {
  return YES;
}
 
- (BOOL)application:(UIApplication*)application
    continueUserActivity:(NSUserActivity*)userActivity
      restorationHandler:(void (^)(NSArray*))restorationHandler {
  return YES;
}
 
- (BOOL)application:(UIApplication*)application
    performActionForShortcutItem:(UIApplicationShortcutItem*)shortcutItem
               completionHandler:(void (^)(BOOL succeeded))completionHandler
    API_AVAILABLE(ios(9.0)) {
  return YES;
}
 
- (BOOL)application:(UIApplication*)application
    didFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
  return YES;
}
 
- (BOOL)application:(UIApplication*)application
    willFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
  return YES;
}
@end
 
/**
 * A mock plugin that simulates behavior causing a mutation crash.
 * This represents a "downstream" mutation where a plugin adds or removes
 * delegates during a lifecycle notification loop.
 */
@interface MutatingPlugin : NSObject <FlutterApplicationLifeCycleDelegate>
@property(nonatomic, weak) FlutterPluginAppLifeCycleDelegate* lifecycleDelegate;
@property(nonatomic, assign) BOOL shouldAdd;  // YES = Add, NO = Remove
@end
 
@implementation MutatingPlugin
- (BOOL)application:(UIApplication*)application
    didFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
  if (self.shouldAdd) {
    // Case 1: Add a new delegate during the loop over _delegates
    [self.lifecycleDelegate addDelegate:[[FakePlugin alloc] init]];
  } else {
    // Case 2: Remove itself during the loop over _delegates via TestUtils category
    [(id)self.lifecycleDelegate removeDelegate:self];
  }
  return YES;
}
@end
 
@interface FlutterPluginAppLifeCycleDelegateTest : XCTestCase
@end
 
@implementation FlutterPluginAppLifeCycleDelegateTest
 
- (void)testCreate {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  XCTAssertNotNil(delegate);
}
 
- (void)testSceneWillConnectFallback {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = [[FakePlugin alloc] init];
  id mockPlugin = OCMPartialMock(plugin);
  [delegate addDelegate:mockPlugin];
 
  id mockOptions = OCMClassMock([UISceneConnectionOptions class]);
  id mockShortcutItem = OCMClassMock([UIApplicationShortcutItem class]);
  OCMStub([mockOptions shortcutItem]).andReturn(mockShortcutItem);
  OCMStub([mockOptions sourceApplication]).andReturn(@"bundle_id");
  id urlContext = OCMClassMock([UIOpenURLContext class]);
  NSURL* url = [NSURL URLWithString:@"http://example.com"];
  OCMStub([urlContext URL]).andReturn(url);
  NSSet<UIOpenURLContext*>* urlContexts = [NSSet setWithObjects:urlContext, nil];
  OCMStub([mockOptions URLContexts]).andReturn(urlContexts);
 
  NSDictionary<UIApplicationOpenURLOptionsKey, id>* expectedApplicationOptions = @{
    UIApplicationLaunchOptionsShortcutItemKey : mockShortcutItem,
    UIApplicationLaunchOptionsSourceApplicationKey : @"bundle_id",
    UIApplicationLaunchOptionsURLKey : url,
  };
 
  [delegate sceneWillConnectFallback:mockOptions];
  OCMVerify([mockPlugin application:[UIApplication sharedApplication]
      didFinishLaunchingWithOptions:expectedApplicationOptions]);
}
 
- (void)testSceneWillConnectFallbackSkippedSupportsScenes {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = [[FakeTestFlutterPluginWithSceneEvents alloc] init];
  id mockPlugin = OCMPartialMock(plugin);
  [delegate addDelegate:mockPlugin];
 
  id mockOptions = OCMClassMock([UISceneConnectionOptions class]);
  id mockShortcutItem = OCMClassMock([UIApplicationShortcutItem class]);
  OCMStub([mockOptions shortcutItem]).andReturn(mockShortcutItem);
  OCMStub([mockOptions sourceApplication]).andReturn(@"bundle_id");
  id urlContext = OCMClassMock([UIOpenURLContext class]);
  NSURL* url = [NSURL URLWithString:@"http://example.com"];
  OCMStub([urlContext URL]).andReturn(url);
  NSSet<UIOpenURLContext*>* urlContexts = [NSSet setWithObjects:urlContext, nil];
  OCMStub([mockOptions URLContexts]).andReturn(urlContexts);
 
  [delegate sceneWillConnectFallback:mockOptions];
  OCMReject([mockPlugin application:[OCMArg any] didFinishLaunchingWithOptions:[OCMArg any]]);
}
 
- (void)testSceneWillConnectFallbackSkippedNoOptions {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = [[FakePlugin alloc] init];
  id mockPlugin = OCMPartialMock(plugin);
  [delegate addDelegate:mockPlugin];
 
  id mockOptions = OCMClassMock([UISceneConnectionOptions class]);
 
  [delegate sceneWillConnectFallback:mockOptions];
  OCMReject([mockPlugin application:[OCMArg any] didFinishLaunchingWithOptions:[OCMArg any]]);
}
 
- (void)testDidEnterBackground {
  XCTNSNotificationExpectation* expectation = [[XCTNSNotificationExpectation alloc]
      initWithName:UIApplicationDidEnterBackgroundNotification];
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = OCMProtocolMock(@protocol(FlutterPlugin));
  [delegate addDelegate:plugin];
  [[NSNotificationCenter defaultCenter]
      postNotificationName:UIApplicationDidEnterBackgroundNotification
                    object:nil];
 
  [self waitForExpectations:@[ expectation ] timeout:5.0];
  OCMVerify([plugin applicationDidEnterBackground:[UIApplication sharedApplication]]);
}
 
- (void)testDidEnterBackgroundWithUIScene {
  XCTNSNotificationExpectation* expectation = [[XCTNSNotificationExpectation alloc]
      initWithName:UIApplicationDidEnterBackgroundNotification];
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id mockApplication = OCMClassMock([FlutterSharedApplication class]);
  OCMStub([mockApplication hasSceneDelegate]).andReturn(YES);
  id plugin = OCMProtocolMock(@protocol(FlutterPlugin));
  [delegate addDelegate:plugin];
  [[NSNotificationCenter defaultCenter]
      postNotificationName:UIApplicationDidEnterBackgroundNotification
                    object:nil];
 
  [self waitForExpectations:@[ expectation ] timeout:5.0];
  OCMReject([plugin applicationDidEnterBackground:[OCMArg any]]);
}
 
- (void)testSceneDidEnterBackgroundFallback {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = OCMProtocolMock(@protocol(FlutterPlugin));
  [delegate addDelegate:plugin];
 
  [delegate sceneDidEnterBackgroundFallback];
  OCMVerify([plugin applicationDidEnterBackground:[UIApplication sharedApplication]]);
}
 
- (void)testUnnecessarySceneDidEnterBackgroundFallback {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = OCMProtocolMock(@protocol(TestFlutterPluginWithSceneEvents));
  [delegate addDelegate:plugin];
 
  [delegate sceneDidEnterBackgroundFallback];
  OCMReject([plugin applicationDidEnterBackground:[OCMArg any]]);
}
 
- (void)testWillEnterForeground {
  XCTNSNotificationExpectation* expectation = [[XCTNSNotificationExpectation alloc]
      initWithName:UIApplicationWillEnterForegroundNotification];
 
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = OCMProtocolMock(@protocol(FlutterPlugin));
  [delegate addDelegate:plugin];
  [[NSNotificationCenter defaultCenter]
      postNotificationName:UIApplicationWillEnterForegroundNotification
                    object:nil];
  [self waitForExpectations:@[ expectation ] timeout:5.0];
  OCMVerify([plugin applicationWillEnterForeground:[UIApplication sharedApplication]]);
}
 
- (void)testWillEnterForegroundWithUIScene {
  XCTNSNotificationExpectation* expectation = [[XCTNSNotificationExpectation alloc]
      initWithName:UIApplicationWillEnterForegroundNotification];
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id mockApplication = OCMClassMock([FlutterSharedApplication class]);
  OCMStub([mockApplication hasSceneDelegate]).andReturn(YES);
  id plugin = OCMProtocolMock(@protocol(FlutterPlugin));
  [delegate addDelegate:plugin];
  [[NSNotificationCenter defaultCenter]
      postNotificationName:UIApplicationWillEnterForegroundNotification
                    object:nil];
 
  [self waitForExpectations:@[ expectation ] timeout:5.0];
  OCMReject([plugin applicationWillEnterForeground:[OCMArg any]]);
}
 
- (void)testSceneWillEnterForegroundFallback {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = OCMProtocolMock(@protocol(FlutterPlugin));
  [delegate addDelegate:plugin];
 
  [delegate sceneWillEnterForegroundFallback];
  OCMVerify([plugin applicationWillEnterForeground:[UIApplication sharedApplication]]);
}
 
- (void)testUnnecessarySceneWillEnterForegroundFallback {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = OCMProtocolMock(@protocol(TestFlutterPluginWithSceneEvents));
  [delegate addDelegate:plugin];
 
  [delegate sceneWillEnterForegroundFallback];
  OCMReject([plugin applicationWillEnterForeground:[OCMArg any]]);
}
 
- (void)testWillResignActive {
  XCTNSNotificationExpectation* expectation =
      [[XCTNSNotificationExpectation alloc] initWithName:UIApplicationWillResignActiveNotification];
 
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = OCMProtocolMock(@protocol(FlutterPlugin));
  [delegate addDelegate:plugin];
  [[NSNotificationCenter defaultCenter]
      postNotificationName:UIApplicationWillResignActiveNotification
                    object:nil];
  [self waitForExpectations:@[ expectation ] timeout:5.0];
  OCMVerify([plugin applicationWillResignActive:[UIApplication sharedApplication]]);
}
 
- (void)testWillResignActiveWithUIScene {
  XCTNSNotificationExpectation* expectation =
      [[XCTNSNotificationExpectation alloc] initWithName:UIApplicationWillResignActiveNotification];
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id mockApplication = OCMClassMock([FlutterSharedApplication class]);
  OCMStub([mockApplication hasSceneDelegate]).andReturn(YES);
  id plugin = OCMProtocolMock(@protocol(FlutterPlugin));
  [delegate addDelegate:plugin];
  [[NSNotificationCenter defaultCenter]
      postNotificationName:UIApplicationWillResignActiveNotification
                    object:nil];
 
  [self waitForExpectations:@[ expectation ] timeout:5.0];
  OCMReject([plugin applicationWillResignActive:[OCMArg any]]);
}
 
- (void)testSceneWillResignActiveFallback {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = OCMProtocolMock(@protocol(FlutterPlugin));
  [delegate addDelegate:plugin];
 
  [delegate sceneWillResignActiveFallback];
  OCMVerify([plugin applicationWillResignActive:[UIApplication sharedApplication]]);
}
 
- (void)testUnnecessarySceneWillResignActiveFallback {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = OCMProtocolMock(@protocol(TestFlutterPluginWithSceneEvents));
  [delegate addDelegate:plugin];
 
  [delegate sceneWillResignActiveFallback];
  OCMReject([plugin applicationWillResignActive:[OCMArg any]]);
}
 
- (void)testDidBecomeActive {
  XCTNSNotificationExpectation* expectation =
      [[XCTNSNotificationExpectation alloc] initWithName:UIApplicationDidBecomeActiveNotification];
 
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = OCMProtocolMock(@protocol(FlutterPlugin));
  [delegate addDelegate:plugin];
  [[NSNotificationCenter defaultCenter]
      postNotificationName:UIApplicationDidBecomeActiveNotification
                    object:nil];
  [self waitForExpectations:@[ expectation ] timeout:5.0];
  OCMVerify([plugin applicationDidBecomeActive:[UIApplication sharedApplication]]);
}
 
- (void)testDidBecomeActiveWithUIScene {
  XCTNSNotificationExpectation* expectation =
      [[XCTNSNotificationExpectation alloc] initWithName:UIApplicationDidBecomeActiveNotification];
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id mockApplication = OCMClassMock([FlutterSharedApplication class]);
  OCMStub([mockApplication hasSceneDelegate]).andReturn(YES);
  id plugin = OCMProtocolMock(@protocol(FlutterPlugin));
  [delegate addDelegate:plugin];
  [[NSNotificationCenter defaultCenter]
      postNotificationName:UIApplicationDidBecomeActiveNotification
                    object:nil];
 
  [self waitForExpectations:@[ expectation ] timeout:5.0];
  OCMReject([plugin applicationDidBecomeActive:[OCMArg any]]);
}
 
- (void)testSceneDidBecomeActiveFallback {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = OCMProtocolMock(@protocol(FlutterPlugin));
  [delegate addDelegate:plugin];
 
  [delegate sceneDidBecomeActiveFallback];
  OCMVerify([plugin applicationDidBecomeActive:[UIApplication sharedApplication]]);
}
 
- (void)testUnnecessarySceneDidBecomeActiveFallback {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = OCMProtocolMock(@protocol(TestFlutterPluginWithSceneEvents));
  [delegate addDelegate:plugin];
 
  [delegate sceneDidBecomeActiveFallback];
  OCMReject([plugin applicationDidBecomeActive:[OCMArg any]]);
}
 
- (void)testSceneFallbackOpenURLContexts {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = [[FakePlugin alloc] init];
  id mockPlugin = OCMPartialMock(plugin);
  [delegate addDelegate:mockPlugin];
 
  id urlContext = OCMClassMock([UIOpenURLContext class]);
  NSURL* url = [NSURL URLWithString:@"http://example.com"];
  OCMStub([urlContext URL]).andReturn(url);
  NSSet<UIOpenURLContext*>* urlContexts = [NSSet setWithObjects:urlContext, nil];
 
  NSDictionary<UIApplicationOpenURLOptionsKey, id>* expectedApplicationOptions = @{
    UIApplicationOpenURLOptionsOpenInPlaceKey : @(NO),
  };
 
  [delegate sceneFallbackOpenURLContexts:urlContexts];
  OCMVerify([mockPlugin application:[UIApplication sharedApplication]
                            openURL:url
                            options:expectedApplicationOptions]);
}
 
- (void)testConvertURLOptions {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = [[FakePlugin alloc] init];
  id mockPlugin = OCMPartialMock(plugin);
  [delegate addDelegate:mockPlugin];
 
  NSString* bundleId = @"app.bundle.id";
  id annotation = @{@"key" : @"value"};
  id eventAttribution = OCMClassMock([UIEventAttribution class]);
 
  UIOpenURLContext* urlContext = OCMClassMock([UIOpenURLContext class]);
  NSURL* url = [NSURL URLWithString:@"http://example.com"];
  OCMStub([urlContext URL]).andReturn(url);
  id sceneOptions = OCMClassMock([UISceneOpenURLOptions class]);
  OCMStub([sceneOptions sourceApplication]).andReturn(bundleId);
  OCMStub([sceneOptions annotation]).andReturn(annotation);
  OCMStub([sceneOptions openInPlace]).andReturn(YES);
  OCMStub([sceneOptions eventAttribution]).andReturn(eventAttribution);
 
  OCMStub([urlContext options]).andReturn(sceneOptions);
  NSSet<UIOpenURLContext*>* urlContexts = [NSSet setWithObjects:urlContext, nil];
 
  [delegate sceneFallbackOpenURLContexts:urlContexts];
 
  NSDictionary<UIApplicationOpenURLOptionsKey, id>* expectedApplicationOptions = @{
    UIApplicationOpenURLOptionsSourceApplicationKey : bundleId,
    UIApplicationOpenURLOptionsAnnotationKey : annotation,
    UIApplicationOpenURLOptionsOpenInPlaceKey : @(YES),
    UIApplicationOpenURLOptionsEventAttributionKey : eventAttribution,
  };
 
  OCMVerify([mockPlugin application:[UIApplication sharedApplication]
                            openURL:url
                            options:expectedApplicationOptions]);
}
 
- (void)testUnnecessarySceneFallbackOpenURLContexts {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = [[FakeTestFlutterPluginWithSceneEvents alloc] init];
  id mockPlugin = OCMPartialMock(plugin);
  [delegate addDelegate:mockPlugin];
 
  id urlContext = OCMClassMock([UIOpenURLContext class]);
  NSSet<UIOpenURLContext*>* urlContexts = [NSSet setWithObjects:urlContext, nil];
 
  [delegate sceneFallbackOpenURLContexts:urlContexts];
  OCMReject([mockPlugin application:[OCMArg any] openURL:[OCMArg any] options:[OCMArg any]]);
}
 
- (void)testSceneFallbackContinueUserActivity {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = [[FakePlugin alloc] init];
  id mockPlugin = OCMPartialMock(plugin);
  [delegate addDelegate:mockPlugin];
 
  id userActivity = OCMClassMock([NSUserActivity class]);
 
  [delegate sceneFallbackContinueUserActivity:userActivity];
  OCMVerify([mockPlugin application:[UIApplication sharedApplication]
               continueUserActivity:userActivity
                 restorationHandler:[OCMArg any]]);
}
 
- (void)testUnnecessarySceneFallbackContinueUserActivity {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = [[FakeTestFlutterPluginWithSceneEvents alloc] init];
  id mockPlugin = OCMPartialMock(plugin);
  [delegate addDelegate:mockPlugin];
 
  id userActivity = OCMClassMock([NSUserActivity class]);
 
  [delegate sceneFallbackContinueUserActivity:userActivity];
  OCMReject([mockPlugin application:[UIApplication sharedApplication]
               continueUserActivity:userActivity
                 restorationHandler:[OCMArg any]]);
}
 
- (void)testSceneFallbackPerformActionForShortcutItem {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  FakePlugin* plugin = [[FakePlugin alloc] init];
  FakePlugin* mockPlugin = OCMPartialMock(plugin);
  [delegate addDelegate:mockPlugin];
 
  id shortcut = OCMClassMock([UIApplicationShortcutItem class]);
  id handler = ^(BOOL succeeded) {
  };
 
  [delegate sceneFallbackPerformActionForShortcutItem:shortcut completionHandler:handler];
  OCMVerify([mockPlugin application:[UIApplication sharedApplication]
       performActionForShortcutItem:shortcut
                  completionHandler:handler]);
}
 
- (void)testUnnecessarySceneFallbackPerformActionForShortcutItem {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  FakeTestFlutterPluginWithSceneEvents* plugin =
      [[FakeTestFlutterPluginWithSceneEvents alloc] init];
  FakeTestFlutterPluginWithSceneEvents* mockPlugin = OCMPartialMock(plugin);
  [delegate addDelegate:mockPlugin];
 
  id shortcut = OCMClassMock([UIApplicationShortcutItem class]);
  [delegate sceneFallbackPerformActionForShortcutItem:shortcut
                                    completionHandler:^(BOOL succeeded){
                                    }];
  OCMReject([mockPlugin application:[OCMArg any]
       performActionForShortcutItem:[OCMArg any]
                  completionHandler:[OCMArg any]]);
}
 
- (void)testWillTerminate {
  XCTNSNotificationExpectation* expectation =
      [[XCTNSNotificationExpectation alloc] initWithName:UIApplicationWillTerminateNotification];
 
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = OCMProtocolMock(@protocol(FlutterPlugin));
  [delegate addDelegate:plugin];
  [[NSNotificationCenter defaultCenter] postNotificationName:UIApplicationWillTerminateNotification
                                                      object:nil];
  [self waitForExpectations:@[ expectation ] timeout:5.0];
  OCMVerify([plugin applicationWillTerminate:[UIApplication sharedApplication]]);
}
 
- (void)testReleasesPluginOnDealloc {
  __weak id<FlutterApplicationLifeCycleDelegate> weakPlugin;
  __weak FlutterPluginAppLifeCycleDelegate* weakDelegate;
  @autoreleasepool {
    FakePlugin* fakePlugin = [[FakePlugin alloc] init];
    weakPlugin = fakePlugin;
    FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
    [delegate addDelegate:fakePlugin];
    weakDelegate = delegate;
  }
  XCTAssertNil(weakPlugin);
  XCTAssertNil(weakDelegate);
}
 
- (void)testApplicationWillFinishLaunchingSceneFallbackForwards {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = [[FakePlugin alloc] init];
  id mockPlugin = OCMPartialMock(plugin);
  [delegate addDelegate:mockPlugin];
  id mockApplication = OCMClassMock([UIApplication class]);
  NSDictionary* options = @{};
 
  [delegate sceneFallbackWillFinishLaunchingApplication:mockApplication];
  OCMVerify(times(1), [mockPlugin application:mockApplication
                          willFinishLaunchingWithOptions:options]);
}
 
- (void)testApplicationWillFinishLaunchingSceneFallbackNoForwardAfterWillLaunch {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = [[FakePlugin alloc] init];
  id mockPlugin = OCMPartialMock(plugin);
  [delegate addDelegate:mockPlugin];
  id mockApplication = OCMClassMock([UIApplication class]);
  NSDictionary* options = @{@"key" : @"value"};
 
  [delegate application:mockApplication willFinishLaunchingWithOptions:options];
  [delegate sceneFallbackWillFinishLaunchingApplication:mockApplication];
  OCMVerify(times(1), [mockPlugin application:mockApplication
                          willFinishLaunchingWithOptions:options]);
}
 
- (void)testApplicationWillFinishLaunchingSceneFallbackNoForwardAfterDidLaunch {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = [[FakePlugin alloc] init];
  id mockPlugin = OCMPartialMock(plugin);
  [delegate addDelegate:mockPlugin];
  id mockApplication = OCMClassMock([UIApplication class]);
  NSDictionary* options = @{@"key" : @"value"};
 
  [delegate application:mockApplication didFinishLaunchingWithOptions:options];
  [delegate sceneFallbackWillFinishLaunchingApplication:mockApplication];
  OCMVerify(times(0), [mockPlugin application:mockApplication
                          willFinishLaunchingWithOptions:options]);
}
 
- (void)testApplicationDidFinishLaunchingSceneFallbackForwards {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = [[FakePlugin alloc] init];
  id mockPlugin = OCMPartialMock(plugin);
  [delegate addDelegate:mockPlugin];
  id mockApplication = OCMClassMock([UIApplication class]);
  NSDictionary* options = @{};
 
  [delegate sceneFallbackDidFinishLaunchingApplication:mockApplication];
  OCMVerify(times(1), [mockPlugin application:mockApplication
                          didFinishLaunchingWithOptions:options]);
}
 
- (void)testApplicationDidFinishLaunchingSceneFallbackNoForward {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  id plugin = [[FakePlugin alloc] init];
  id mockPlugin = OCMPartialMock(plugin);
  [delegate addDelegate:mockPlugin];
  id mockApplication = OCMClassMock([UIApplication class]);
  NSDictionary* options = @{@"key" : @"value"};
 
  [delegate application:mockApplication didFinishLaunchingWithOptions:options];
  [delegate sceneFallbackDidFinishLaunchingApplication:mockApplication];
  OCMVerify(times(1), [mockPlugin application:mockApplication
                          didFinishLaunchingWithOptions:options]);
}
 
- (void)testCanAddDelegateDuringEnumeration {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  MutatingPlugin* mutatingPlugin = [[MutatingPlugin alloc] init];
  mutatingPlugin.lifecycleDelegate = delegate;
  mutatingPlugin.shouldAdd = YES;  // Add Mode
 
  [delegate addDelegate:mutatingPlugin];
 
  // Validation that [_delegates allObjects] (snapshotting) prevents NSGenericException crash
  // when a plugin adds another plugin during the dispatch loop.
  BOOL result = [delegate application:[UIApplication sharedApplication]
        didFinishLaunchingWithOptions:@{}];
 
  XCTAssertTrue(result);
}
 
- (void)testCanRemoveSelfDuringEnumeration {
  FlutterPluginAppLifeCycleDelegate* delegate = [[FlutterPluginAppLifeCycleDelegate alloc] init];
  MutatingPlugin* mutatingPlugin = [[MutatingPlugin alloc] init];
  mutatingPlugin.lifecycleDelegate = delegate;
  mutatingPlugin.shouldAdd = NO;  // Delete Mode
 
  [delegate addDelegate:mutatingPlugin];
 
  // Validation that [_delegates allObjects] (snapshotting) prevents crash
  // when a plugin removes itself via removeDelegate during the dispatch loop.
  BOOL result = [delegate application:[UIApplication sharedApplication]
        didFinishLaunchingWithOptions:@{}];
 
  XCTAssertTrue(result);
}
 
@end