chore: write tests for home screen (#26)

test/modules/home/home_interactor_test.dart

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+import 'package:flutter_test/flutter_test.dart';
+import 'package:mockito/annotations.dart';
+import 'package:mockito/mockito.dart';
+import 'package:quick_test/quick_test.dart';
+import 'package:survey/models/survey_info.dart';
+import 'package:survey/models/user_info.dart';
+import 'package:survey/modules/home/home_module.dart';
+import 'package:survey/repositories/auth_repository.dart';
+import 'package:survey/repositories/survey_repository.dart';
+import 'package:survey/services/locator/locator_service.dart';
+import '../../helpers/behavior_subject_generator.dart';
+import 'home_interactor_test.mocks.dart';
+
+@GenerateMocks([HomeInteractorDelegate, SurveyRepository, AuthRepository])
+void main() {
+  describe("a Home interactor", () {
+    late HomeInteractor interactor;
+    late MockHomeInteractorDelegate delegate;
+    late MockSurveyRepository surveyRepository;
+    late MockAuthRepository authRepository;
+    late BehaviorSubjectGenerator generator;
+
+    beforeEach(() {
+      generator = BehaviorSubjectGenerator();
+
+      delegate = MockHomeInteractorDelegate();
+      when(delegate.isSurveysCachedDidGet)
+          .thenAnswer((realInvocation) => generator.make(0));
+      when(delegate.authenticatedUserDidGet)
+          .thenAnswer((realInvocation) => generator.make(1));
+      when(delegate.surveysDidFetch)
+          .thenAnswer((realInvocation) => generator.make(2));
+      when(delegate.surveysDidFailToFetch)
+          .thenAnswer((realInvocation) => generator.make(3));
+
+      surveyRepository = MockSurveyRepository();
+      locator.registerSingleton<SurveyRepository>(surveyRepository);
+
+      authRepository = MockAuthRepository();
+      locator.registerSingleton<AuthRepository>(authRepository);
+
+      interactor = HomeInteractorImpl();
+      interactor.delegate = delegate;
+    });
+
+    describe("it's getIsSurveysCached is called", () {
+      beforeEach(() {
+        when(surveyRepository.isSurveysCached)
+            .thenAnswer((realInvocation) => Future.value(true));
+        interactor.getIsSurveysCached();
+      });
+
+      it("triggers delegate's isSurveysCachedDidGet emits", () {
+        expect(delegate.isSurveysCachedDidGet, emits(true));
+      });
+    });
+
+    describe("it's getAuthenticatedUser is called", () {
+      final user = UserInfo();
+      beforeEach(() {
+        when(authRepository.user).thenReturn(user);
+        interactor.getAuthenticatedUser();
+      });
+
+      it("triggers delegate's authenticatedUserDidGet emits", () {
+        expect(delegate.authenticatedUserDidGet, emits(user));
+      });
+    });
+
+    describe("it's fetchSurveys is called", () {
+      context("when surveyRepository's fetchSurveys return success", () {
+        final surveys = List<SurveyInfo>.empty();
+        beforeEach(() {
+          when(surveyRepository.fetchSurveys(force: anyNamed("force")))
+              .thenAnswer((realInvocation) => Future.value(surveys));
+          interactor.fetchSurveys();
+        });
+
+        it("triggers delegate's surveysDidFetch emits", () {
+          expect(delegate.surveysDidFetch, emits(surveys));
+        });
+      });
+
+      context("when surveyRepository's fetchSurveys return failure", () {
+        final exception = Exception();
+        beforeEach(() {
+          when(surveyRepository.fetchSurveys(force: anyNamed("force")))
+              .thenAnswer((realInvocation) => Future.error(exception));
+          interactor.fetchSurveys();
+        });
+
+        it("triggers delegate's surveysDidFailToFetch emits", () {
+          expect(delegate.surveysDidFailToFetch, emits(exception));
+        });
+      });
+    });
+  });
+}

test/modules/home/home_interactor_test.mocks.dart

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+// Mocks generated by Mockito 5.0.7 from annotations
+// in survey/test/modules/home/home_interactor_test.dart.
+// Do not manually edit this file.
+
+import 'dart:async' as _i7;
+
+import 'package:mockito/mockito.dart' as _i1;
+import 'package:rxdart/src/subjects/behavior_subject.dart' as _i2;
+import 'package:survey/models/survey_info.dart' as _i4;
+import 'package:survey/models/user_info.dart' as _i5;
+import 'package:survey/modules/home/home_module.dart' as _i3;
+import 'package:survey/repositories/auth_repository.dart' as _i8;
+import 'package:survey/repositories/survey_repository.dart' as _i6;
+
+// ignore_for_file: comment_references
+// ignore_for_file: unnecessary_parenthesis
+
+// ignore_for_file: prefer_const_constructors
+
+// ignore_for_file: avoid_redundant_argument_values
+
+class _FakeBehaviorSubject<T> extends _i1.Fake
+    implements _i2.BehaviorSubject<T> {}
+
+/// A class which mocks [HomeInteractorDelegate].
+///
+/// See the documentation for Mockito's code generation for more information.
+class MockHomeInteractorDelegate extends _i1.Mock
+    implements _i3.HomeInteractorDelegate {
+  MockHomeInteractorDelegate() {
+    _i1.throwOnMissingStub(this);
+  }
+
+  @override
+  _i2.BehaviorSubject<bool> get isSurveysCachedDidGet => (super.noSuchMethod(
+      Invocation.getter(#isSurveysCachedDidGet),
+      returnValue: _FakeBehaviorSubject<bool>()) as _i2.BehaviorSubject<bool>);
+  @override
+  _i2.BehaviorSubject<List<_i4.SurveyInfo>> get surveysDidFetch =>
+      (super.noSuchMethod(Invocation.getter(#surveysDidFetch),
+              returnValue: _FakeBehaviorSubject<List<_i4.SurveyInfo>>())
+          as _i2.BehaviorSubject<List<_i4.SurveyInfo>>);
+  @override
+  _i2.BehaviorSubject<Exception> get surveysDidFailToFetch =>
+      (super.noSuchMethod(Invocation.getter(#surveysDidFailToFetch),
+              returnValue: _FakeBehaviorSubject<Exception>())
+          as _i2.BehaviorSubject<Exception>);
+  @override
+  _i2.BehaviorSubject<_i5.UserInfo> get authenticatedUserDidGet =>
+      (super.noSuchMethod(Invocation.getter(#authenticatedUserDidGet),
+              returnValue: _FakeBehaviorSubject<_i5.UserInfo>())
+          as _i2.BehaviorSubject<_i5.UserInfo>);
+}
+
+/// A class which mocks [SurveyRepository].
+///
+/// See the documentation for Mockito's code generation for more information.
+class MockSurveyRepository extends _i1.Mock implements _i6.SurveyRepository {
+  MockSurveyRepository() {
+    _i1.throwOnMissingStub(this);
+  }
+
+  @override
+  _i7.Future<bool> get isSurveysCached =>
+      (super.noSuchMethod(Invocation.getter(#isSurveysCached),
+          returnValue: Future<bool>.value(false)) as _i7.Future<bool>);
+  @override
+  _i7.Future<List<_i4.SurveyInfo>> fetchSurveys({bool? force}) =>
+      (super.noSuchMethod(Invocation.method(#fetchSurveys, [], {#force: force}),
+              returnValue:
+                  Future<List<_i4.SurveyInfo>>.value(<_i4.SurveyInfo>[]))
+          as _i7.Future<List<_i4.SurveyInfo>>);
+}
+
+/// A class which mocks [AuthRepository].
+///
+/// See the documentation for Mockito's code generation for more information.
+class MockAuthRepository extends _i1.Mock implements _i8.AuthRepository {
+  MockAuthRepository() {
+    _i1.throwOnMissingStub(this);
+  }
+
+  @override
+  bool get isAuthenticated => (super
+          .noSuchMethod(Invocation.getter(#isAuthenticated), returnValue: false)
+      as bool);
+  @override
+  _i7.Future<void> login({String? email, String? password}) =>
+      (super.noSuchMethod(
+          Invocation.method(#login, [], {#email: email, #password: password}),
+          returnValue: Future<void>.value(null),
+          returnValueForMissingStub: Future.value()) as _i7.Future<void>);
+  @override
+  _i7.Future<void> logout() =>
+      (super.noSuchMethod(Invocation.method(#logout, []),
+          returnValue: Future<void>.value(null),
+          returnValueForMissingStub: Future.value()) as _i7.Future<void>);
+  @override
+  _i7.Future<void> attempt() =>
+      (super.noSuchMethod(Invocation.method(#attempt, []),
+          returnValue: Future<void>.value(null),
+          returnValueForMissingStub: Future.value()) as _i7.Future<void>);
+  @override
+  _i7.Future<void> fetchUser() =>
+      (super.noSuchMethod(Invocation.method(#fetchUser, []),
+          returnValue: Future<void>.value(null),
+          returnValueForMissingStub: Future.value()) as _i7.Future<void>);
+  @override
+  _i7.Future<void> attemptAndFetchUser() =>
+      (super.noSuchMethod(Invocation.method(#attemptAndFetchUser, []),
+          returnValue: Future<void>.value(null),
+          returnValueForMissingStub: Future.value()) as _i7.Future<void>);
+}

test/modules/home/home_module_test.dart

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+import 'package:flutter/widgets.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:quick_test/quick_test.dart';
+import 'package:survey/modules/home/home_module.dart';
+
+import '../../mocks/build_context.dart';
+
+void main() {
+  describe("a Home module", () {
+    late HomeModule module;
+    beforeEach(() {
+      module = HomeModule();
+    });
+
+    describe("it's build is called", () {
+      late Widget widget;
+
+      beforeEach(() {
+        widget = module.build(MockBuildContext());
+      });
+
+      it("returns LandingViewImpl", () {
+        expect(widget, isA<HomeViewImpl>());
+      });
+    });
+  });
+}

test/modules/home/home_presenter_test.dart

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+import 'package:mockito/annotations.dart';
+import 'package:mockito/mockito.dart';
+import 'package:quick_test/quick_test.dart';
+import 'package:survey/models/survey_info.dart';
+import 'package:survey/models/user_info.dart';
+import 'package:survey/modules/home/home_module.dart';
+
+import '../../mocks/build_context.dart';
+import 'home_presenter_test.mocks.dart';
+
+@GenerateMocks([HomeView, HomeRouter, HomeInteractor])
+void main() {
+  describe("a Home presenter", () {
+    late HomePresenterImpl presenter;
+    late MockHomeView view;
+    late MockHomeRouter router;
+    late MockHomeInteractor interactor;
+    late MockBuildContext buildContext;
+
+    beforeEach(() {
+      buildContext = MockBuildContext();
+
+      view = MockHomeView();
+      when(view.context).thenReturn(buildContext);
+
+      router = MockHomeRouter();
+
+      interactor = MockHomeInteractor();
+
+      presenter = HomePresenterImpl();
+      presenter.configure(view: view, interactor: interactor, router: router);
+    });
+
+    describe("it's stateDidInit emits", () {
+      beforeEach(() {
+        presenter.stateDidInit.add(null);
+      });
+
+      it("triggers interactor to get isSurveysCached and authenticatedUser",
+          () {
+        verify(interactor.getIsSurveysCached()).called(1);
+        verify(interactor.getAuthenticatedUser()).called(1);
+      });
+    });
+
+    describe("it's showDetailButtonDidTap emits", () {
+      final survey = SurveyInfo();
+
+      beforeEach(() {
+        presenter.showDetailButtonDidTap.add(survey);
+      });
+
+      it("triggers router to push to Survey Detail screen", () {
+        verify(router.pushToSurveyDetail(context: buildContext, survey: survey))
+            .called(1);
+      });
+    });
+
+    describe("it's surveysDidFetch emits", () {
+      final surveys = List<SurveyInfo>.empty();
+
+      beforeEach(() {
+        presenter.surveysDidFetch.add(surveys);
+      });
+
+      it("trigger view to stop skeleton animation, dismiss progress hud and show surveys",
+          () {
+        verify(view.stopSkeletonAnimation()).called(1);
+        verify(view.showSurveys(surveys)).called(1);
+        verify(view.dismissProgressHUD()).called(1);
+      });
+    });
+
+    describe("it's surveysDidFailToFetch emits", () {
+      final exception = Exception();
+
+      beforeEach(() {
+        presenter.surveysDidFailToFetch.add(exception);
+      });
+
+      it("trigger view to stop skeleton animation, dismiss progress hud and alert error",
+          () {
+        verify(view.stopSkeletonAnimation()).called(1);
+        verify(view.alert(exception)).called(1);
+        verify(view.dismissProgressHUD()).called(1);
+      });
+    });
+
+    describe("it's isSurveysCachedDidGet emits", () {
+      context("when isSurveysCached is true", () {
+        beforeEach(() {
+          presenter.isSurveysCachedDidGet.add(true);
+        });
+
+        it("trigger interactor to fetch surveys", () {
+          verify(interactor.fetchSurveys()).called(1);
+        });
+      });
+
+      context("when isSurveysCached is false", () {
+        beforeEach(() {
+          presenter.isSurveysCachedDidGet.add(false);
+        });
+
+        it("trigger interactor to fetch surveys", () {
+          verify(interactor.fetchSurveys()).called(1);
+        });
+
+        it("trigger view to begin skeleton animation", () {
+          verify(view.beginSkeletonAnimation()).called(1);
+        });
+      });
+    });
+
+    describe("it's didSwipeDown emits", () {
+      beforeEach(() {
+        presenter.didSwipeDown.add(null);
+      });
+
+      it("trigger view to show progress hud", () {
+        verify(view.showProgressHUD()).called(1);
+      });
+
+      it("trigger interactor to force fetch surveys", () {
+        verify(interactor.fetchSurveys(force: true)).called(1);
+      });
+    });
+
+    describe("it's authenticatedUserDidGet emits", () {
+      final user = UserInfo();
+      beforeEach(() {
+        presenter.authenticatedUserDidGet.add(user);
+      });
+
+      it("trigger view to show user", () {
+        verify(view.showUser(user)).called(1);
+      });
+    });
+  });
+}