fake_http_client 0.2.0

A package for faking Dart/Flutter HttpClient's responses. It is handy for integration tests. Also it may help a lot during app development with an unstable back-end.

example/fake_http_client_example.dart

import 'dart:async';
import 'dart:convert';
import 'dart:io';

import 'package:fake_http_client/fake_http_client.dart';

class _FakeDataHttpOverrides extends HttpOverrides {
  @override
  HttpClient createHttpClient(_) {
    return FakeHttpClient((request, client) {
      final url = request.uri.toString();
      if (url.contains('non-existing-site')) {
        return FakeHttpResponse(
          statusCode: HttpStatus.ok,
          body: 'Hey!',
        );
      } else {
        return FakeHttpResponse(
          statusCode: HttpStatus.unauthorized,
          body: 'Sorry, please sign in!',
        );
      }
    });
  }
}

void main() {
  HttpOverrides.runWithHttpOverrides(() async {
    final client = HttpClient();

    final demoUrls = ['https://non-existing-site.com', 'https://foo.com'];

    for (final demoUrl in demoUrls) {
      final request = await client.getUrl(Uri.parse(demoUrl));
      final response = await request.close();
      final responseStatus = response.statusCode;
      final responseBody = await _readResponseBody(response);

      stdout.writeln(
        "Got the response from '$demoUrl', it's status: $responseStatus, body: $responseBody.",
      );
    }
  }, _FakeDataHttpOverrides());
}

Future<String> _readResponseBody(HttpClientResponse response) {
  final completer = Completer<String>();
  final contents = StringBuffer();
  response.transform(utf8.decoder).listen(
        (data) => contents.write(data),
        onDone: () => completer.complete(contents.toString()),
      );
  return completer.future;
}