implementation data: datasources

Author: devguusta

lib/core/http_client/http_client.dart

@@ -0,0 +1,14 @@
+
+abstract class HttpClient {
+  Future<HttpResponse> get(String url);
+  Future<HttpResponse> post(String url, {required Map<String,dynamic> body});
+}
+
+class HttpResponse {
+  final dynamic data;
+  final int? statusCode;
+  HttpResponse({
+    required this.data,
+    this.statusCode,
+  });
+}

lib/core/http_client/http_implementation.dart

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+import 'package:http/http.dart' as http;
+import 'package:nasa/core/http_client/http_client.dart';
+
+class HttpImplementation implements HttpClient {
+  final client = http.Client();
+  @override
+  Future<HttpResponse> get(String url) async {
+    final response = await client.get(Uri.parse(url));
+    return HttpResponse(data: response.body, statusCode: response.statusCode);
+  }
+
+  @override
+  Future<HttpResponse> post(String url, {required Map<String, dynamic> body}) {
+    // TODO: implement post
+    throw UnimplementedError();
+  }
+}

lib/core/utils/converters/date_to_string_converter.dart

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+class DateToStringConverter {
+  static String convert(DateTime date) {
+    var dateSplitted = date.toString().split(' ');
+    print(dateSplitted);
+    return dateSplitted.first;
+  }
+}

lib/core/utils/keys/nasa_api_keys.dart

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+class NasaApiKeys {
+  static String apiKey = 'DEMO_KEY';
+}

lib/features/data/datasources/endpoints/nasa_endpoints.dart

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+class NasaEndPoints {
+  static String apod(String apiKey, String date) =>
+      "https://api.nasas.gov/planetary/apod?api key=$apiKey&date=$date";
+}

lib/features/data/datasources/space_media_datasource_implementation.dart

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+import 'dart:convert';
+
+import 'package:nasa/core/http_client/http_client.dart';
+import 'package:nasa/core/usecase/errors/exceptions.dart';
+import 'package:nasa/core/utils/converters/date_to_string_converter.dart';
+import 'package:nasa/core/utils/keys/nasa_api_keys.dart';
+import 'package:nasa/features/data/datasources/space_media_datasource.dart';
+import 'package:nasa/features/data/models/space_media_model.dart';
+
+import 'endpoints/nasa_endpoints.dart';
+
+class NasaDatasourceImplementation implements ISpaceMediaDatasource {
+  final HttpClient client;
+
+  NasaDatasourceImplementation(this.client);
+
+  @override
+  Future<SpaceMediaModel> getSpaceMediaFromDate(DateTime date) async {
+    final response = await client.get(NasaEndPoints.apod(
+        NasaApiKeys.apiKey, DateToStringConverter.convert(date)));
+    if (response.statusCode == 200) {
+      return SpaceMediaModel.fromJson(jsonDecode(response.data));
+    } else {
+      throw ServerException();
+    }
+  }
+}

test/features/data/datasources/space_media_datasource_implementation_test.dart

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+import 'package:flutter_test/flutter_test.dart';
+import 'package:mocktail/mocktail.dart';
+import 'package:nasa/core/http_client/http_client.dart';
+import 'package:nasa/core/usecase/errors/exceptions.dart';
+import 'package:nasa/features/data/datasources/space_media_datasource.dart';
+import 'package:nasa/features/data/datasources/space_media_datasource_implementation.dart';
+import 'package:nasa/features/data/models/space_media_model.dart';
+
+import '../../../mocks/space_media_mock.dart';
+
+class HttpClientMock extends Mock implements HttpClient {}
+
+void main() {
+  late ISpaceMediaDatasource datasource;
+  late HttpClient client;
+
+  setUp(() {
+    client = HttpClientMock();
+    datasource = NasaDatasourceImplementation(client);
+  });
+  final tDateTime = DateTime(2021, 02, 02);
+  final urlExpected = "https://apod.nasa.gov/apod/ap210924.html";
+  void successMock() {
+    when(() => client.get(any())).thenAnswer(
+        (_) async => HttpResponse(data: spaceMediaMock, statusCode: 200));
+  }
+
+  test('should call the get method with correct url', () async {
+    successMock();
+
+    await datasource.getSpaceMediaFromDate(tDateTime);
+    verify(() => client.get(urlExpected)).called(1);
+  });
+
+  test('should return a SpaceMediaModel when is success', () async {
+    successMock();
+
+    final tSpaceMediaModelExpected = SpaceMediaModel(
+        description: "Meteors can be colurful",
+        mediaType: "image",
+        title: "A corlorful quadrantid",
+        mediaUrl: "http://aadasdd.com.br");
+    final result = await datasource.getSpaceMediaFromDate(tDateTime);
+    expect(result, tSpaceMediaModelExpected);
+  });
+  test('should throw a ServerException when the call is unsuccessful', ()async{
+    when(() => client.get(any())).thenAnswer((_)async => HttpResponse(data: 'something went wrong', statusCode: 400));
+
+    final result = datasource.getSpaceMediaFromDate(tDateTime);
+
+    expect(()=> result, throwsA(ServerException()));
+  });
+}