feat: WeatherScreenで利用する状態の更新テスト

test/weather_screen_state_controller_test.dart

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+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:flutter_training/model/weather.dart';
+import 'package:flutter_training/model/weather_condition.dart';
+import 'package:flutter_training/model/weather_exception.dart';
+import 'package:flutter_training/model/weather_request.dart';
+import 'package:flutter_training/model/weather_response.dart';
+import 'package:flutter_training/presentation/screen/weather/weather_screen_state.dart';
+import 'package:flutter_training/presentation/screen/weather/weather_screen_state_controller.dart';
+import 'package:mockito/annotations.dart';
+import 'package:mockito/mockito.dart';
+
+import 'weather_screen_state_controller_test.mocks.dart';
+
+@GenerateNiceMocks([MockSpec<Weather>()])
+void main() {
+  late MockWeather mock;
+  late ProviderContainer container;
+  late WeatherScreenStateController controller;
+  final request = WeatherRequest(
+    area: 'tokyo',
+    date: DateTime.now(),
+  );
+
+  setUp(() {
+    mock = MockWeather();
+    container = ProviderContainer(
+      overrides: [weatherProvider.overrideWithValue(mock)],
+    );
+    controller = container.read(weatherScreenStateControllerProvider.notifier);
+  });
+
+  tearDown(() {
+    container.dispose();
+  });
+
+  group('WeatherScreenで利用する状態の更新テスト', () {
+    test('状態更新テスト_初期状態', () {
+      // Then
+      expect(
+        container.read(weatherScreenStateControllerProvider),
+        const WeatherScreenState.initial(),
+      );
+    });
+
+    test('状態更新テスト_更新成功した場合', () {
+      // Given
+      const expectedResponse = WeatherScreenState.success(
+        weather: WeatherResponse(
+          weatherCondition: WeatherCondition.cloudy,
+          maxTemperature: 21,
+          minTemperature: 7,
+        ),
+      );
+
+      provideDummy<Result<WeatherResponse, AppException>>(
+        const Success(
+          WeatherResponse(
+            weatherCondition: WeatherCondition.cloudy,
+            maxTemperature: 21,
+            minTemperature: 7,
+          ),
+        ),
+      );
+
+      when(mock.fetch(any)).thenReturn(
+        const Success<WeatherResponse, AppException>(
+          WeatherResponse(
+            weatherCondition: WeatherCondition.cloudy,
+            maxTemperature: 21,
+            minTemperature: 7,
+          ),
+        ),
+      );
+
+      // When
+      controller.update(request);
+
+      // Then
+      expect(
+        controller.state,
+        expectedResponse,
+      );
+    });
+
+    test('状態更新テスト_更新失敗した場合', () {
+      // Given
+      const expectedResponse = UnknownWeather();
+
+      provideDummy<Result<WeatherResponse, AppException>>(
+        const Failure(
+          UnknownWeather(),
+        ),
+      );
+
+      when(mock.fetch(any)).thenReturn(
+        const Failure<WeatherResponse, AppException>(
+          expectedResponse,
+        ),
+      );
+
+      // When
+      controller.update(request);
+
+      // Then
+      expect(
+        controller.state,
+        WeatherScreenState.error(
+          message: expectedResponse.message,
+        ),
+      );
+    });
+  });
+}

test/weather_screen_state_controller_test.mocks.dart

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+// Mocks generated by Mockito 5.4.4 from annotations
+// in flutter_training/test/weather_screen_state_controller_test.dart.
+// Do not manually edit this file.
+
+// ignore_for_file: no_leading_underscores_for_library_prefixes
+import 'package:flutter_training/model/weather.dart' as _i2;
+import 'package:flutter_training/model/weather_exception.dart' as _i4;
+import 'package:flutter_training/model/weather_request.dart' as _i5;
+import 'package:flutter_training/model/weather_response.dart' as _i3;
+import 'package:mockito/mockito.dart' as _i1;
+import 'package:mockito/src/dummies.dart' as _i6;
+
+// ignore_for_file: type=lint
+// ignore_for_file: avoid_redundant_argument_values
+// ignore_for_file: avoid_setters_without_getters
+// ignore_for_file: comment_references
+// ignore_for_file: deprecated_member_use
+// ignore_for_file: deprecated_member_use_from_same_package
+// ignore_for_file: implementation_imports
+// ignore_for_file: invalid_use_of_visible_for_testing_member
+// ignore_for_file: prefer_const_constructors
+// ignore_for_file: unnecessary_parenthesis
+// ignore_for_file: camel_case_types
+// ignore_for_file: subtype_of_sealed_class
+
+/// A class which mocks [Weather].
+///
+/// See the documentation for Mockito's code generation for more information.
+class MockWeather extends _i1.Mock implements _i2.Weather {
+  @override
+  _i2.Result<_i3.WeatherResponse, _i4.AppException> fetch(
+          _i5.WeatherRequest? request) =>
+      (super.noSuchMethod(
+        Invocation.method(
+          #fetch,
+          [request],
+        ),
+        returnValue:
+            _i6.dummyValue<_i2.Result<_i3.WeatherResponse, _i4.AppException>>(
+          this,
+          Invocation.method(
+            #fetch,
+            [request],
+          ),
+        ),
+        returnValueForMissingStub:
+            _i6.dummyValue<_i2.Result<_i3.WeatherResponse, _i4.AppException>>(
+          this,
+          Invocation.method(
+            #fetch,
+            [request],
+          ),
+        ),
+      ) as _i2.Result<_i3.WeatherResponse, _i4.AppException>);
+}