小部件在颤振中测试导航，模拟不起作用

Question

颤振测试的超级新手。我不明白为什么我收到以下错误

verify(mockNavigationObserver.didPush(any, any));

════════════════════════════════════════════════════════════════════════════════════════════════╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞════════════════════════════════════════════════════
The following TestFailure object was thrown running a test:
No matching calls (actually, no calls at all).
(If you called `verify(...).called(0);`, please instead use `verifyNever(...);`.)
When the exception was thrown, this was the stack:
#0      fail (package:test_api/src/frontend/expect.dart:153:30)
#1      _VerifyCall._checkWith (package:mockito/src/mock.dart:648:7)
#2      _makeVerify.<anonymous closure> (package:mockito/src/mock.dart:935:18)
#3      main.<anonymous closure>.<anonymous closure> (file:<my_project_path>/test/navigation_test.dart:53:13)
<asynchronous suspension>
#4      testWidgets.<anonymous closure>.<anonymous closure> (package:flutter_test/src/widget_tester.dart:124:25)
#5      TestWidgetsFlutterBinding._runTestBody (package:flutter_test/src/binding.dart:696:19)
<asynchronous suspension>
#8      TestWidgetsFlutterBinding._runTest (package:flutter_test/src/binding.dart:679:14)
#9      AutomatedTestWidgetsFlutterBinding.runTest.<anonymous closure> (package:flutter_test/src/binding.dart:1050:24)
#15     AutomatedTestWidgetsFlutterBinding.runTest (package:flutter_test/src/binding.dart:1047:15)
#16     testWidgets.<anonymous closure> (package:flutter_test/src/widget_tester.dart:121:22)
#17     Declarer.test.<anonymous closure>.<anonymous closure>.<anonymous closure> (package:test_api/src/backend/declarer.dart:171:27)
<asynchronous suspension>
#18     Invoker.waitForOutstandingCallbacks.<anonymous closure> (package:test_api/src/backend/invoker.dart:242:15)
#23     Invoker.waitForOutstandingCallbacks (package:test_api/src/backend/invoker.dart:239:5)
#24     Declarer.test.<anonymous closure>.<anonymous closure> (package:test_api/src/backend/declarer.dart:169:33)
#29     Declarer.test.<anonymous closure> (package:test_api/src/backend/declarer.dart:168:13)
#30     Invoker._onRun.<anonymous closure>.<anonymous closure>.<anonymous closure>.<anonymous closure> (package:test_api/src/backend/invoker.dart:392:25)
#44     _Timer._runTimers (dart:isolate-patch/timer_impl.dart:384:19)
#45     _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:418:5)
#46     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:174:12)
(elided 28 frames from class _FakeAsync, package dart:async, package dart:async-patch, and package stack_trace)
The test description was:
StartPage .. LogInButton -> LogIn Screen

我的navigation_test.dart如下：

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:mockito/mockito.dart';
import 'package:project/auth/provider/auth_provider.dart';
import 'package:project/auth/screens/start_screen.dart';
import 'package:project/common/config/finders.dart';
import 'package:project/common/config/key_strings.dart';
import 'package:project/common/config/route_config.dart';
import 'package:provider/provider.dart';
// Mock class
class MockNavigatorObserver extends Mock implements NavigatorObserver {}
class MockAuthProvider extends Mock implements AuthProvider {}
void main() {
group('StartPage navigation tests', () {
NavigatorObserver mockNavigationObserver;
AuthProvider mockAuthProvider;
setUp(() {
mockNavigationObserver = MockNavigatorObserver();
mockAuthProvider = MockAuthProvider();
});
Widget createWidgetForTesting({Widget child}) {
return MaterialApp(
home: child,
routes: RouteConfig.routes,
);
}
Future<Null> _buildStartScreen(WidgetTester tester) async {
await tester.pumpWidget(
ChangeNotifierProvider<AuthProvider>.value(
value: mockAuthProvider,
child: createWidgetForTesting(child: StartScreen()),
));
verify(mockNavigationObserver.didPush(any, any));
}
Future<Null> _navigateToPageByButtonKey(
WidgetTester tester, String buttonKey) async {
Finder buttonFinder = find.byKey(Key(buttonKey));
expect(buttonFinder, findsOneWidget);
await tester.tap(buttonFinder);
await tester.pumpAndSettle();
}
testWidgets('StartPage .. RegisterButton -> CreateProfile Screen',
(WidgetTester tester) async {
await _buildWidget(tester, StartScreen());
await _navigateToPageByButtonKey(tester, START_SCREEN_REGISTER_BUTTON_KEY);
verify(mockNavigationObserver.didPush(any, any));
expect(find.byKey(Key(CREATE_PROFILE_SCREEN_KEY)), findsOneWidget);
});
});
}

Answer 1

我没有注册我的模拟导航观察者。在我做事时需要少看电视。

Widget createWidgetForTesting({Widget child}) {
return MaterialApp(
home: child,
routes: RouteConfig.routes,
navigatorObservers: [mockNavigationObserver],
);
}