add performance tests

pkg/analysis_server/benchmark/perf/performance_tests.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 server.performance;
+
+import 'dart:async';
+
+import 'package:analysis_server/src/protocol.dart';
+import 'package:unittest/unittest.dart';
+
+import '../../test/integration/integration_tests.dart';
+
+/**
+ * Base class for analysis server performance tests.
+ */
+abstract class AbstractAnalysisServerPerformanceTest
+    extends AbstractAnalysisServerIntegrationTest {
+  /**
+   * Stopwatch for timing results;
+   */
+  Stopwatch stopwatch = new Stopwatch();
+
+  /**
+   * Send the server an 'analysis.setAnalysisRoots' command directing it to
+   * analyze [sourceDirectory].
+   */
+  Future setAnalysisRoot() {
+    return sendAnalysisSetAnalysisRoots([sourceDirectory.path], []);
+  }
+
+  /**
+   * Enable [SERVER_STATUS] notifications so that [analysisFinished]
+   * can be used.
+   */
+  Future subscribeToStatusNotifications() {
+    List<Future> futures = <Future>[];
+    futures.add(sendServerSetSubscriptions([ServerService.STATUS]));
+    return Future.wait(futures);
+  }
+
+  /**
+   * The server is automatically started before every test.
+   */
+  @override
+  Future setUp() {
+    onAnalysisErrors.listen((AnalysisErrorsParams params) {
+      currentAnalysisErrors[params.file] = params.errors;
+    });
+    onServerError.listen((ServerErrorParams params) {
+      // A server error should never happen during an integration test.
+      fail('${params.message}\n${params.stackTrace}');
+    });
+    Completer serverConnected = new Completer();
+    onServerConnected.listen((_) {
+      expect(serverConnected.isCompleted, isFalse);
+      serverConnected.complete();
+    });
+    return startServer().then((_) {
+      server.listenToOutput(dispatchNotification);
+      server.exitCode.then((_) {
+        skipShutdown = true;
+      });
+      return serverConnected.future;
+    });
+  }
+
+  /**
+   * After every test, the server is stopped.
+   */
+  @override
+  Future tearDown() {
+    return shutdownIfNeeded();
+  }
+}