Implement "analysis.reanalyze" in analysis server.

pkg/analysis_server/test/analysis/reanalyze_test.dart

+// Copyright (c) 2014, 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.analysis.reanalyze;
+
+import 'package:analysis_server/src/constants.dart';
+import 'package:analysis_server/src/protocol.dart';
+import 'package:analyzer/src/generated/engine.dart';
+import 'package:unittest/unittest.dart';
+
+import '../analysis_abstract.dart';
+import '../reflective_tests.dart';
+
+
+main() {
+  groupSep = ' | ';
+  runReflectiveTests(ReanalyzeTest);
+}
+
+
+@ReflectiveTestCase()
+class ReanalyzeTest extends AbstractAnalysisTest {
+  test_reanalyze() {
+    createProject();
+    List<AnalysisContext> contexts = server.folderMap.values.toList();
+    expect(contexts, hasLength(1));
+    AnalysisContext oldContext = contexts[0];
+    // Reanalyze should cause a brand new context to be built.
+    Request request = new Request("0", ANALYSIS_REANALYZE);
+    handleSuccessfulRequest(request);
+    contexts = server.folderMap.values.toList();
+    expect(contexts, hasLength(1));
+    AnalysisContext newContext = contexts[0];
+    expect(newContext, isNot(same(oldContext)));
+  }
+}