Add utilities to support the outline notification

pkg/analyzer_plugin/test/plugin/outline_mixin_test.dart

Index: pkg/analyzer_plugin/test/plugin/outline_mixin_test.dart
diff --git a/pkg/analyzer_plugin/test/plugin/outline_mixin_test.dart b/pkg/analyzer_plugin/test/plugin/outline_mixin_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..2909103c281ff009b966e8377ef634ecda3ccafa
--- /dev/null
+++ b/pkg/analyzer_plugin/test/plugin/outline_mixin_test.dart
@@ -0,0 +1,98 @@
+// 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:analyzer/file_system/file_system.dart';
+import 'package:analyzer/file_system/memory_file_system.dart';
+import 'package:analyzer/src/dart/analysis/driver.dart';
+import 'package:analyzer_plugin/plugin/outline_mixin.dart';
+import 'package:analyzer_plugin/protocol/protocol.dart';
+import 'package:analyzer_plugin/protocol/protocol_common.dart';
+import 'package:analyzer_plugin/protocol/protocol_generated.dart';
+import 'package:analyzer_plugin/src/utilities/outline/outline.dart';
+import 'package:analyzer_plugin/utilities/outline/outline.dart';
+import 'package:path/src/context.dart';
+import 'package:test/test.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+import 'mocks.dart';
+
+void main() {
+  defineReflectiveTests(OutlineMixinTest);
+}
+
+@reflectiveTest
+class OutlineMixinTest {
+  MemoryResourceProvider resourceProvider = new MemoryResourceProvider();
+
+  String packagePath1;
+  String filePath1;
+  ContextRoot contextRoot1;
+
+  MockChannel channel;
+  _TestServerPlugin plugin;
+
+  void setUp() {
+    Context pathContext = resourceProvider.pathContext;
+
+    packagePath1 = resourceProvider.convertPath('/package1');
+    filePath1 = pathContext.join(packagePath1, 'lib', 'test.dart');
+    resourceProvider.newFile(filePath1, '');
+    contextRoot1 = new ContextRoot(packagePath1, <String>[]);
+
+    channel = new MockChannel();
+    plugin = new _TestServerPlugin(resourceProvider);
+    plugin.start(channel);
+  }
+
+  test_sendOutlineNotification() async {
+    await plugin.handleAnalysisSetContextRoots(
+        new AnalysisSetContextRootsParams([contextRoot1]));
+
+    channel.listen(null, onNotification: (Notification notification) {
+      expect(notification, isNotNull);
+      AnalysisOutlineParams params =
+          new AnalysisOutlineParams.fromNotification(notification);
+      expect(params.file, filePath1);
+      expect(params.outline, hasLength(3));
+    });
+    await plugin.sendOutlineNotification(filePath1);

[scheglov, 2017/08/24 18:29:21]

We don't actually verify that onNotification is invoked.

[Brian Wilkerson, 2017/08/24 18:52:47]

Good catch!

+  }
+}
+
+class _TestOutlineContributor implements OutlineContributor {
+  int elementCount;
+
+  _TestOutlineContributor(this.elementCount);
+
+  @override
+  void computeOutline(OutlineRequest request, OutlineCollector collector) {
+    for (int i = 0; i < elementCount; i++) {
+      collector.startElement(
+          new Element(ElementKind.METHOD, 'm$i', 0), 20 * i, 20);
+      collector.endElement();
+    }
+  }
+}
+
+class _TestServerPlugin extends MockServerPlugin with OutlineMixin {
+  _TestServerPlugin(ResourceProvider resourceProvider)
+      : super(resourceProvider);
+
+  @override
+  List<OutlineContributor> getOutlineContributors(String path) {
+    return <OutlineContributor>[
+      new _TestOutlineContributor(2),
+      new _TestOutlineContributor(1)
+    ];
+  }
+
+  @override
+  Future<OutlineRequest> getOutlineRequest(String path) async {
+    AnalysisResult result = new AnalysisResult(
+        null, null, path, null, null, null, null, null, null, null, null);
+    return new DartOutlineRequestImpl(resourceProvider, result);
+  }
+}