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Commit e62fbe3

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Merge pull request #13 from CoderJava/news-repository
Create News Repository for call top headlines news API
2 parents 82b060a + 73bf0f9 commit e62fbe3

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import 'package:dartz/dartz.dart';
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import 'package:dio/dio.dart';
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import 'package:flutter_news_app/core/error/failure.dart';
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import 'package:flutter_news_app/core/network/network_info.dart';
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import 'package:flutter_news_app/feature/data/datasource/news/news_remote_data_source.dart';
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import 'package:flutter_news_app/feature/data/model/topheadlinesnews/top_headlines_news_response_model.dart';
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import 'package:flutter_news_app/feature/domain/repository/news/news_repository.dart';
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import 'package:meta/meta.dart';
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class NewsRepositoryImpl implements NewsRepository {
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final NewsRemoteDataSource newsRemoteDataSource;
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final NetworkInfo networkInfo;
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NewsRepositoryImpl({
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@required this.newsRemoteDataSource,
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@required this.networkInfo,
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});
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@override
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Future<Either<Failure, TopHeadlinesNewsResponseModel>> getTopHeadlinesNews() async {
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var isConnected = await networkInfo.isConnected;
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if (isConnected) {
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try {
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var response = await newsRemoteDataSource.getTopHeadlinesNews();
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return Right(response);
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} on DioError catch (error) {
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return Left(ServerFailure(error.message));
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}
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} else {
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return Left(ConnectionFailure());
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}
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}
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}
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import 'package:dartz/dartz.dart';
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import 'package:flutter_news_app/core/error/failure.dart';
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import 'package:flutter_news_app/feature/data/model/topheadlinesnews/top_headlines_news_response_model.dart';
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abstract class NewsRepository {
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Future<Either<Failure, TopHeadlinesNewsResponseModel>> getTopHeadlinesNews();
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}
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import 'dart:convert';
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import 'package:dartz/dartz.dart';
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import 'package:dio/dio.dart';
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import 'package:flutter_news_app/core/error/failure.dart';
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import 'package:flutter_news_app/core/network/network_info.dart';
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import 'package:flutter_news_app/feature/data/datasource/news/news_remote_data_source.dart';
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import 'package:flutter_news_app/feature/data/model/topheadlinesnews/top_headlines_news_response_model.dart';
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import 'package:flutter_news_app/feature/data/repository/news/news_repository_impl.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:mockito/mockito.dart';
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import '../../../../fixture/fixture_reader.dart';
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class MockNewsRemoteDataSource extends Mock implements NewsRemoteDataSource {}
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class MockNetworkInfo extends Mock implements NetworkInfo {}
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void main() {
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NewsRepositoryImpl newsRepositoryImpl;
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MockNewsRemoteDataSource mockNewsRemoteDataSource;
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MockNetworkInfo mockNetworkInfo;
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setUp(() {
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mockNewsRemoteDataSource = MockNewsRemoteDataSource();
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mockNetworkInfo = MockNetworkInfo();
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newsRepositoryImpl = NewsRepositoryImpl(
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newsRemoteDataSource: mockNewsRemoteDataSource,
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networkInfo: mockNetworkInfo,
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);
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});
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void setUpMockNetworkConnected() {
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when(mockNetworkInfo.isConnected).thenAnswer((_) async => true);
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}
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void setUpMockNetworkDisconnected() {
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when(mockNetworkInfo.isConnected).thenAnswer((_) async => false);
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}
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group('getTopHeadlinesNews', () {
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final tTopHeadlinesNewsResponseModel = TopHeadlinesNewsResponseModel.fromJson(
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json.decode(
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fixture('top_headlines_news_response_model.json'),
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),
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);
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test(
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'make sure that the device is connected to the internet when making a request to the endpoint',
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() async {
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// arrange
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setUpMockNetworkConnected();
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// act
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await newsRepositoryImpl.getTopHeadlinesNews();
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// assert
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verify(mockNetworkInfo.isConnected);
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},
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);
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test(
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'make sure to return the value of the TopHeadlinesNewsResponseModel object when '
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'NewsRemoteDataSource successfully receives a successful data response from the endpoint',
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() async {
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// arrange
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setUpMockNetworkConnected();
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when(mockNewsRemoteDataSource.getTopHeadlinesNews()).thenAnswer((_) async => tTopHeadlinesNewsResponseModel);
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// act
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final result = await newsRepositoryImpl.getTopHeadlinesNews();
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// assert
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verify(mockNewsRemoteDataSource.getTopHeadlinesNews());
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expect(result, Right(tTopHeadlinesNewsResponseModel));
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},
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);
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test(
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'make sure to return the ServerFailure object when NewsRemoteDataSource receives a failure '
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'data response from the endpoint',
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() async {
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// arrange
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setUpMockNetworkConnected();
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when(mockNewsRemoteDataSource.getTopHeadlinesNews()).thenThrow(DioError(error: 'testError'));
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// act
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final result = await newsRepositoryImpl.getTopHeadlinesNews();
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// assert
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verify(mockNewsRemoteDataSource.getTopHeadlinesNews());
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expect(result, Left(ServerFailure('testError')));
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},
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);
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test(
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'make sure to return the ConnectionFailure object when the device connection is not connected '
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'to the internet',
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() async {
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// arrange
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setUpMockNetworkDisconnected();
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// act
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final result = await newsRepositoryImpl.getTopHeadlinesNews();
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// assert
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verify(mockNetworkInfo.isConnected);
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expect(result, Left(ConnectionFailure()));
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},
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);
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});
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}

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