Add response status code test

pkgs/http_client_conformance_tests/lib/http_client_conformance_tests.dart

@@ -15,6 +15,7 @@ import 'src/request_headers_tests.dart';
 import 'src/response_body_streamed_test.dart';
 import 'src/response_body_tests.dart';
 import 'src/response_headers_tests.dart';
+import 'src/response_status_line_tests.dart';
 import 'src/server_errors_test.dart';
 
 export 'src/close_tests.dart' show testClose;
@@ -29,6 +30,7 @@ export 'src/request_headers_tests.dart' show testRequestHeaders;
 export 'src/response_body_streamed_test.dart' show testResponseBodyStreamed;
 export 'src/response_body_tests.dart' show testResponseBody;
 export 'src/response_headers_tests.dart' show testResponseHeaders;
+export 'src/response_status_line_tests.dart' show testResponseStatusLine;
 export 'src/server_errors_test.dart' show testServerErrors;
 
 /// Runs the entire test suite against the given [Client].
@@ -64,6 +66,7 @@ void testAll(Client Function() clientFactory,
       canStreamResponseBody: canStreamResponseBody);
   testRequestHeaders(clientFactory());
   testResponseHeaders(clientFactory());
+  testResponseStatusLine(clientFactory());
   testRedirect(clientFactory(), redirectAlwaysAllowed: redirectAlwaysAllowed);
   testServerErrors(clientFactory());
   testCompressedResponseBody(clientFactory());

pkgs/http_client_conformance_tests/lib/src/response_status_line_server.dart

@@ -0,0 +1,36 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'dart:async';
+import 'dart:io';
+
+import 'package:stream_channel/stream_channel.dart';
+
+/// Starts an HTTP server that returns custom headers.
+///
+/// Channel protocol:
+///    On Startup:
+///     - send port
+///    On Request Received:
+///     - load response header map from channel
+///     - exit
+void hybridMain(StreamChannel<Object?> channel) async {
+  late HttpServer server;
+
+  server = (await HttpServer.bind('localhost', 0))
+    ..listen((request) async {
+      await request.drain<void>();
+      final socket = await request.response.detachSocket(writeHeaders: false);
+
+      socket.writeAll([
+        'HTTP/1.1 OK',
+        'Content-Length: 0',
+        '', // Add \r\n at the end of this header section.
+      ], '\r\n');
+      await socket.close();
+      unawaited(server.close());
+    });
+
+  channel.sink.add(server.port);
+}

pkgs/http_client_conformance_tests/lib/src/response_status_line_tests.dart

@@ -0,0 +1,33 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:async/async.dart';
+import 'package:http/http.dart';
+import 'package:stream_channel/stream_channel.dart';
+import 'package:test/test.dart';
+
+import 'response_status_line_server_vm.dart'
+    if (dart.library.html) 'response_status_line_server_web.dart';
+
+/// Tests that the [Client] correctly processes response headers.
+void testResponseStatusLine(Client client) async {
+  group('response status line', () {
+    late String host;
+    late StreamChannel<Object?> httpServerChannel;
+    late StreamQueue<Object?> httpServerQueue;
+
+    setUp(() async {
+      httpServerChannel = await startServer();
+      httpServerQueue = StreamQueue(httpServerChannel.stream);
+      host = 'localhost:${await httpServerQueue.next}';
+    });
+
+    test('without status code', () async {
+      await expectLater(
+        client.get(Uri.http(host, '')),
+        throwsA(isA<ClientException>()),
+      );
+    });
+  });
+}

pkgs/java_http/test/java_client_test.dart

@@ -11,6 +11,7 @@ void main() {
     testIsolate(JavaClient.new);
     testResponseBody(JavaClient(), canStreamResponseBody: false);
     testResponseHeaders(JavaClient());
+    testResponseStatusLine(JavaClient());
     testRequestBody(JavaClient());
     testRequestHeaders(JavaClient());
     testMultipleClients(JavaClient.new);