Initial implementation of copy/paste support

pkg/analysis_server/test/integration/analysis/get_imported_elements_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 'dart:async';
+
+import 'package:analysis_server/protocol/protocol_generated.dart';
+import 'package:test/test.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+import '../support/integration_tests.dart';
+
+main() {
+  defineReflectiveSuite(() {
+    defineReflectiveTests(AnalysisGetImportedElementsIntegrationTest);
+  });
+}
+
+@reflectiveTest
+class AnalysisGetImportedElementsIntegrationTest
+    extends AbstractAnalysisServerIntegrationTest {
+  /**
+   * Pathname of the file containing Dart code.
+   */
+  String pathname;
+
+  /**
+   * Dart code under test.
+   */
+  final String text = r'''
+main() {}
+''';
+
+  /**
+   * Check that an analysis.getImportedElements request on the region starting
+   * with the first character that matches [target] and having the given
+   * [length] matches the given list of [expected] imported elements.
+   */
+  checkElements(
+      String target, int length, List<ImportedElements> expected) async {
+    int offset = text.indexOf(target);
+    AnalysisGetImportedElementsResult result =
+        await sendAnalysisGetImportedElements(pathname, offset, length);
+
+    expect(result.elements, hasLength(expected.length));
+    // TODO(brianwilkerson) Finish implementing this.
+  }
+
+  /**
+   * Check that an analysis.getImportedElements request on the region matching
+   * [target] produces an empty list of elements.
+   */
+  Future<Null> checkNoElements(String target) async {
+    int offset = text.indexOf(target);
+    AnalysisGetImportedElementsResult result =
+        await sendAnalysisGetImportedElements(pathname, offset, target.length);
+
+    expect(result.elements, hasLength(0));
+  }
+
+  setUp() {
+    return super.setUp().then((_) {
+      pathname = sourcePath('test.dart');
+    });
+  }
+
+  test_getImportedElements() async {
+    writeFile(pathname, text);
+    standardAnalysisSetup();
+    await analysisFinished;
+
+    List<Future> tests = [];
+    tests.add(checkNoElements('main() {}'));
+    return Future.wait(tests);
+  }
+}