Initial support for getting fixes from plugins

pkg/analysis_server/test/src/domain_abstract_test.dart

+// Copyright (c) 2017, 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 'package:analysis_server/src/domain_abstract.dart';
+import 'package:analysis_server/src/plugin/plugin_manager.dart';
+import 'package:analysis_server/src/protocol_server.dart' hide Element;
+import 'package:analyzer_plugin/protocol/protocol.dart' as plugin;
+import 'package:analyzer_plugin/protocol/protocol_constants.dart' as plugin;
+import 'package:analyzer_plugin/protocol/protocol_generated.dart' as plugin;
+import 'package:test/test.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+import '../analysis_abstract.dart';
+
+main() {
+  defineReflectiveSuite(() {
+    defineReflectiveTests(AbstractRequestHandlerTest);
+  });
+}
+
+@reflectiveTest
+class AbstractRequestHandlerTest extends AbstractAnalysisTest {
+  test_waitForResponses_empty_noTimeout() async {
+    AbstractRequestHandler handler = new TestAbstractRequestHandler(server);
+    Map<PluginInfo, Future<plugin.Response>> futures =
+        <PluginInfo, Future<plugin.Response>>{};
+    List<plugin.Response> responses = await handler.waitForResponses(futures);
+    expect(responses, isEmpty);
+  }
+
+  test_waitForResponses_empty_timeout() async {
+    AbstractRequestHandler handler = new TestAbstractRequestHandler(server);
+    Map<PluginInfo, Future<plugin.Response>> futures =
+        <PluginInfo, Future<plugin.Response>>{};
+    List<plugin.Response> responses =
+        await handler.waitForResponses(futures, timeout: 250);
+    expect(responses, isEmpty);
+  }
+
+  test_waitForResponses_nonEmpty_noTimeout_immediate() async {
+    AbstractRequestHandler handler = new TestAbstractRequestHandler(server);
+    PluginInfo plugin1 = new PluginInfo('p1', '', '', null, null);
+    PluginInfo plugin2 = new PluginInfo('p2', '', '', null, null);
+    plugin.Response response1 = new plugin.Response('1');
+    plugin.Response response2 = new plugin.Response('2');
+    Map<PluginInfo, Future<plugin.Response>> futures =
+        <PluginInfo, Future<plugin.Response>>{
+      plugin1: new Future.value(response1),
+      plugin2: new Future.value(response2),
+    };
+    List<plugin.Response> responses = await handler.waitForResponses(futures);
+    expect(responses, unorderedEquals([response1, response2]));
+  }
+
+  test_waitForResponses_nonEmpty_noTimeout_withError() async {
+    AbstractRequestHandler handler = new TestAbstractRequestHandler(server);
+    PluginInfo plugin1 = new PluginInfo('p1', '', '', null, null);
+    PluginInfo plugin2 = new PluginInfo('p2', '', '', null, null);
+    plugin.Response response1 = new plugin.Response('1');
+    plugin.Response response2 = new plugin.Response('2',
+        error: new plugin.RequestError(
+            plugin.RequestErrorCode.PLUGIN_ERROR, 'message'));
+    Map<PluginInfo, Future<plugin.Response>> futures =
+        <PluginInfo, Future<plugin.Response>>{
+      plugin1: new Future.value(response1),
+      plugin2: new Future.value(response2),
+    };
+    List<plugin.Response> responses = await handler.waitForResponses(futures);
+    expect(responses, unorderedEquals([response1]));
+  }
+
+  test_waitForResponses_nonEmpty_timeout_someDelayed() async {
+    AbstractRequestHandler handler = new TestAbstractRequestHandler(server);
+    PluginInfo plugin1 = new PluginInfo('p1', '', '', null, null);
+    PluginInfo plugin2 = new PluginInfo('p2', '', '', null, null);
+    PluginInfo plugin3 = new PluginInfo('p3', '', '', null, null);
+    plugin.Response response1 = new plugin.Response('1');
+    plugin.Response response2 = new plugin.Response('2');
+    plugin.Response response3 = new plugin.Response('3');
+    Map<PluginInfo, Future<plugin.Response>> futures =
+        <PluginInfo, Future<plugin.Response>>{
+      plugin1:
+          new Future.delayed(new Duration(milliseconds: 500), () => response1),
+      plugin2: new Future.value(response2),
+      plugin3:
+          new Future.delayed(new Duration(milliseconds: 500), () => response3)
+    };
+    List<plugin.Response> responses =
+        await handler.waitForResponses(futures, timeout: 50);
+    expect(responses, unorderedEquals([response2]));
+  }
+}
+
+class TestAbstractRequestHandler extends AbstractRequestHandler {
+  TestAbstractRequestHandler(server) : super(server);
+
+  @override
+  Response handleRequest(Request request) {
+    fail('Unexpected invocation of handleRequest');
+    return null;
+  }
+}