Initial implementation of copy/paste support

pkg/analysis_server/test/integration/edit/import_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:analyzer_plugin/protocol/protocol_common.dart';
+import 'package:test/test.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+import '../support/integration_tests.dart';
+
+main() {
+  defineReflectiveSuite(() {
+    defineReflectiveTests(AnalysisGetImportElementsIntegrationTest);
+  });
+}
+
+@reflectiveTest
+class AnalysisGetImportElementsIntegrationTest
+    extends AbstractAnalysisServerIntegrationTest {
+  /**
+   * Pathname of the file containing Dart code.
+   */
+  String pathname;
+
+  /**
+   * Dart code under test.
+   */
+  final String text = r'''
+''';
+
+  /**
+   * Check that an edit.importElements request with the given list of [elements]
+   * produces the [expected] list of edits.
+   */
+  checkEdits(List<ImportedElements> elements, List<SourceEdit> expected) async {
+    EditImportElementsResult result =
+        await sendEditImportElements(pathname, elements);
+
+    expect(result.edits, hasLength(expected.length));
+    // TODO(brianwilkerson) Finish implementing this.
+  }
+
+  /**
+   * Check that an edit.importElements request with the given list of [elements]
+   * produces no edits.
+   */
+  Future<Null> checkNoEdits(List<ImportedElements> elements) async {
+    EditImportElementsResult result =
+        await sendEditImportElements(pathname, <ImportedElements>[]);
+
+    expect(result.edits, hasLength(0));
+  }
+
+  setUp() {
+    return super.setUp().then((_) {
+      pathname = sourcePath('test.dart');
+    });
+  }
+
+  test_getImportedElements() async {
+    writeFile(pathname, text);
+    standardAnalysisSetup();
+    await analysisFinished;
+
+    List<Future> tests = [];
+    // Test that an empty list of elements produces no edits.
+    tests.add(checkNoEdits(<ImportedElements>[]));
+    return Future.wait(tests);
+  }
+}