Optimize ElementId search, rename the test file.

pkg/analysis_server/test/services/index2/index2.dart

Index: pkg/analysis_server/test/services/index2/index2.dart
diff --git a/pkg/analysis_server/test/services/index2/index2.dart b/pkg/analysis_server/test/services/index2/index2.dart
deleted file mode 100644
index 322e9d82080caba134374b4025a802c15f00b36d..0000000000000000000000000000000000000000
--- a/pkg/analysis_server/test/services/index2/index2.dart
+++ /dev/null
@@ -1,158 +0,0 @@
-// Copyright (c) 2016, 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/src/services/index2/index2.dart';
-import 'package:analyzer/dart/ast/ast.dart';
-import 'package:analyzer/dart/element/element.dart';
-import 'package:analyzer/src/generated/source.dart';
-import 'package:analyzer/src/summary/format.dart';
-import 'package:analyzer/src/summary/idl.dart';
-import 'package:test_reflective_loader/test_reflective_loader.dart';
-import 'package:unittest/unittest.dart';
-
-import '../../abstract_single_unit.dart';
-import '../../utils.dart';
-
-main() {
-  initializeTestEnvironment();
-  defineReflectiveTests(Index2Test);
-}
-
-@reflectiveTest
-class Index2Test extends AbstractSingleUnitTest {
-  PackageIndexStore indexStore = new _MemoryPackageIndexStore();
-  Index2 index;
-
-  /**
-   * Return the [Location] with given properties, or fail.
-   */
-  Location findLocation(List<Location> locations, String libraryUri,
-      String unitUri, int offset, int length) {
-    for (Location location in locations) {
-      if (location.libraryUri == libraryUri &&
-          location.unitUri == unitUri &&
-          location.offset == offset &&
-          location.length == length) {
-        return location;
-      }
-    }
-    fail('No at $offset with length $length in\n${locations.join('\n')}');
-    return null;
-  }
-
-  /**
-   * Return the [Location] with given properties, or fail.
-   */
-  Location findLocationSource(
-      List<Location> locations, Source source, String search,
-      {int length}) {
-    String code = source.contents.data;
-    int offset = code.indexOf(search);
-    expect(offset, isNonNegative, reason: 'Not found "$search" in\n$code');
-    length ??= getLeadingIdentifierLength(search);
-    String uri = source.uri.toString();
-    return findLocation(locations, uri, uri, offset, length);
-  }
-
-  /**
-   * Return the [Location] with given properties, or fail.
-   */
-  Location findLocationTest(List<Location> locations, String search,
-      {int length}) {
-    int offset = findOffset(search);
-    length ??= getLeadingIdentifierLength(search);
-    String testUri = testSource.uri.toString();
-    return findLocation(locations, testUri, testUri, offset, length);
-  }
-
-  void setUp() {
-    super.setUp();
-    index = new Index2(indexStore);
-  }
-
-  void tearDown() {
-    super.tearDown();
-    index = null;
-    indexStore = null;
-  }
-
-  test_getRelations_isExtendedBy() async {
-    _indexTestUnit(r'''
-class A {}
-class B extends A {} // B
-''');
-    Source source2 = _indexUnit(
-        '/test2.dart',
-        r'''
-import 'test.dart';
-class C extends A {} // C
-''');
-    ClassElement elementA = testUnitElement.getType('A');
-    List<Location> locations =
-        await index.getRelations(elementA, IndexRelationKind.IS_EXTENDED_BY);
-    findLocationTest(locations, 'A {} // B');
-    findLocationSource(locations, source2, 'A {} // C');
-  }
-
-  test_getRelations_isReferencedBy() async {
-    _indexTestUnit(r'''
-main(int a, int b) {
-}
-''');
-    ClassElement intElement = context.typeProvider.intType.element;
-    List<Location> locations = await index.getRelations(
-        intElement, IndexRelationKind.IS_REFERENCED_BY);
-    findLocationTest(locations, 'int a');
-    findLocationTest(locations, 'int b');
-  }
-
-  void _indexTestUnit(String code) {
-    resolveTestUnit(code);
-    index.indexUnit(testUnit);
-  }
-
-  Source _indexUnit(String path, String code) {
-    Source source = addSource(path, code);
-    CompilationUnit unit = resolveLibraryUnit(source);
-    index.indexUnit(unit);
-    return source;
-  }
-}
-
-/**
- * A [PackageIndexId] for [_MemoryPackageIndexStore].
- */
-class _MemoryPackageIndexId implements PackageIndexId {
-  final String key;
-
-  _MemoryPackageIndexId(this.key);
-}
-
-/**
- * A [PackageIndexStore] that keeps objects in memory;
- */
-class _MemoryPackageIndexStore implements PackageIndexStore {
-  final Map<String, PackageIndex> indexMap = <String, PackageIndex>{};
-
-  @override
-  Future<Iterable<PackageIndexId>> getIds() async {
-    return indexMap.keys.map((key) => new _MemoryPackageIndexId(key));
-  }
-
-  @override
-  Future<PackageIndex> getIndex(PackageIndexId id) async {
-    return indexMap[(id as _MemoryPackageIndexId).key];
-  }
-
-  @override
-  putIndex(String unitLibraryUri, String unitUnitUri,
-      PackageIndexBuilder indexBuilder) {
-    List<int> indexBytes = indexBuilder.toBuffer();
-    PackageIndex index = new PackageIndex.fromBuffer(indexBytes);
-    String key = '$unitLibraryUri;$unitUnitUri';
-    indexMap[key] = index;
-  }
-}