Initial support for managing partial results from plugins

pkg/analysis_server/test/src/plugin/result_collector_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 'package:analysis_server/src/plugin/result_collector.dart';
+import 'package:test/test.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+main() {
+  defineReflectiveSuite(() {
+    defineReflectiveTests(ResultCollectorTest);
+  });
+}
+
+@reflectiveTest
+class ResultCollectorTest {
+  static const String serverId = 'server';
+
+  ResultCollector<String> collector = new ResultCollector<String>(serverId);
+
+  void test_clearResultsForFile() {
+    String filePath1 = 'test1.dart';
+    String filePath2 = 'test2.dart';
+    String value1 = 'r1';
+    String value2 = 'r2';
+    collector.startCollectingFor(filePath1);
+    collector.startCollectingFor(filePath2);
+    collector.putResults(filePath1, 'p', value1);
+    collector.putResults(filePath2, 'p', value2);
+    expect(collector.getResults(filePath1), contains(value1));
+    expect(collector.getResults(filePath2), contains(value2));
+
+    collector.clearResultsForFile(filePath2);
+    expect(collector.getResults(filePath1), contains(value1));
+    expect(collector.getResults(filePath2), isEmpty);
+  }
+
+  void test_clearResultsFromPlugin() {
+    String filePath = 'test.dart';
+    String p1Name = 'p1';
+    String p2Name = 'p2';
+    String p1Value = 'r1';
+    String p2Value = 'r2';
+
+    collector.startCollectingFor(filePath);
+    collector.putResults(filePath, p1Name, p1Value);
+    collector.putResults(filePath, p2Name, p2Value);
+    expect(collector.getResults(filePath), contains(p1Value));
+    expect(collector.getResults(filePath), contains(p2Value));
+
+    collector.clearResultsFromPlugin(p1Name);
+    expect(collector.getResults(filePath), isNot(contains(p1Value)));
+    expect(collector.getResults(filePath), contains(p2Value));
+  }
+
+  void test_getResults_emptyCollector() {
+    expect(collector.getResults('test.dart'), isEmpty);
+  }
+
+  void test_getResults_serverFirst() {
+    // This is a flaky test in that it is possible for the test to pass even
+    // when the code is broken.
+    String filePath = 'test.dart';
+    String value1 = 'r1';
+    String value2 = 'r2';
+    collector.startCollectingFor(filePath);
+    collector.putResults(filePath, 'p', value1);
+    collector.putResults(filePath, serverId, value2);
+    expect(collector.getResults(filePath), <String>[value2, value1]);
+  }
+
+  void test_putResults_collecting() {
+    String filePath1 = 'test1.dart';
+    String filePath2 = 'test2.dart';
+    String value1 = 'r1';
+    String value2 = 'r2';
+    expect(collector.getResults(filePath1), isEmpty);
+    expect(collector.getResults(filePath2), isEmpty);
+
+    collector.startCollectingFor(filePath1);
+    collector.startCollectingFor(filePath2);
+    collector.putResults(filePath1, 'p', value1);
+    collector.putResults(filePath2, 'p', value2);
+    expect(collector.getResults(filePath1), contains(value1));
+    expect(collector.getResults(filePath1), isNot(contains(value2)));
+    expect(collector.getResults(filePath2), contains(value2));
+    expect(collector.getResults(filePath2), isNot(contains(value1)));
+  }
+
+  void test_putResults_notCollecting() {
+    String filePath = 'test.dart';
+    expect(collector.getResults(filePath), isEmpty);
+
+    collector.putResults(filePath, 'p', 'r');
+    expect(collector.getResults(filePath), isEmpty);
+  }
+
+  void test_stopCollectingFor() {
+    String filePath = 'test.dart';
+    String value = 'r';
+    collector.startCollectingFor(filePath);
+    collector.putResults(filePath, 'p', value);
+    expect(collector.getResults(filePath), contains(value));
+
+    collector.stopCollectingFor(filePath);
+    expect(collector.getResults(filePath), isEmpty);
+    collector.putResults(filePath, 'p', value);
+    expect(collector.getResults(filePath), isEmpty);
+  }
+}