Experimental `getDiagnostics` request (#24480).

pkg/analysis_server/test/domain_experimental_test.dart

+// Copyright (c) 2015, 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.
+
+library test.domain.experimental;
+
+import 'package:analysis_server/plugin/protocol/protocol.dart';
+import 'package:analysis_server/src/analysis_server.dart';
+import 'package:analysis_server/src/domain_experimental.dart';
+import 'package:analysis_server/src/plugin/server_plugin.dart';
+import 'package:analyzer/file_system/memory_file_system.dart';
+import 'package:analyzer/instrumentation/instrumentation.dart';
+import 'package:plugin/manager.dart';
+import 'package:unittest/unittest.dart';
+
+import 'mock_sdk.dart';
+import 'mocks.dart';
+import 'utils.dart';
+
+main() {
+  AnalysisServer server;
+  ExperimentalDomainHandler handler;
+  MemoryResourceProvider resourceProvider;
+
+  initializeTestEnvironment();
+
+  setUp(() {
+    var serverChannel = new MockServerChannel();
+    resourceProvider = new MemoryResourceProvider();
+    ExtensionManager manager = new ExtensionManager();
+    ServerPlugin serverPlugin = new ServerPlugin();
+    manager.processPlugins([serverPlugin]);
+    server = new AnalysisServer(
+        serverChannel,
+        resourceProvider,
+        new MockPackageMapProvider(),
+        null,
+        serverPlugin,
+        new AnalysisServerOptions(),
+        new MockSdk(),
+        InstrumentationService.NULL_SERVICE);
+    handler = new ExperimentalDomainHandler(server);
+  });
+
+  group('ExperimentalDomainHandler', () {
+    test('getDiagnostics', () async {
+      String file = '/project/bin/test.dart';
+      resourceProvider.newFile('/project/pubspec.yaml', 'name: project');
+      resourceProvider.newFile(file, 'main() {}');
+
+      server.setAnalysisRoots('0', ['/project/'], [], {});
+
+      await server.onAnalysisComplete;
+
+      var request = new ExperimentalGetDiagnosticsParams().toRequest('0');
+      var response = handler.handleRequest(request);
+
+      int fileCount = MockSdk.LIBRARIES.length + 1 /* test.dart */;
+
+      var json = response.toJson()[Response.RESULT];
+      expect(json['contexts'], hasLength(1));
+      var context = json['contexts'][0];
+      expect(context['name'], '/project');
+      expect(context['explicitFileCount'], fileCount);
+      expect(context['implicitFileCount'], 0);
+      expect(context['workItemQueueLength'], isNotNull);
+    });
+
+    test('getDiagnostics - (no root)', () async {
+      var request = new ExperimentalGetDiagnosticsParams().toRequest('0');
+      var response = handler.handleRequest(request);
+      var json = response.toJson()[Response.RESULT];
+      expect(json['contexts'], hasLength(0));
+    });
+  });
+}