Revert "Remove unused option in server API"

pkg/analysis_server/test/mocks.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 mocks;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart'
     hide Element, ElementKind;
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/channel/channel.dart';
 import 'package:analysis_server/src/operation/operation.dart';
 import 'package:analysis_server/src/operation/operation_analysis.dart';
 import 'package:analyzer/dart/element/element.dart';
+import 'package:analyzer/file_system/file_system.dart' as resource;
+import 'package:analyzer/file_system/memory_file_system.dart' as resource;
+import 'package:analyzer/source/package_map_provider.dart';
+import 'package:analyzer/source/pub_package_map_provider.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:typed_mock/typed_mock.dart';
 import 'package:unittest/unittest.dart';
 
 /**
  * Answer the absolute path the SDK relative to the currently running
  * script or throw an exception if it cannot be found.
  */
 String get sdkPath {
@@ skipping 90 matching lines @@
   final ElementKind kind = ElementKind.LOCAL_VARIABLE;
 }
 
 class MockLogger extends TypedMock implements Logger {}
 
 class MockMethodElement extends StringTypedMock implements MethodElement {
   final kind = ElementKind.METHOD;
   MockMethodElement([String name = 'method']) : super(name);
 }
 
+/**
+ * A mock [PackageMapProvider].
+ */
+class MockPackageMapProvider implements PubPackageMapProvider {
+  /**
+   * Package map that will be returned by the next call to [computePackageMap].
+   */
+  Map<String, List<resource.Folder>> packageMap =
+      <String, List<resource.Folder>>{};
+
+  /**
+   * Package maps that will be returned by the next call to [computePackageMap].
+   */
+  Map<String, Map<String, List<resource.Folder>>> packageMaps = null;
+
+  /**
+   * Dependency list that will be returned by the next call to [computePackageMap].
+   */
+  Set<String> dependencies = new Set<String>();
+
+  /**
+   * Number of times [computePackageMap] has been called.
+   */
+  int computeCount = 0;
+
+  @override
+  PackageMapInfo computePackageMap(resource.Folder folder) {
+    ++computeCount;
+    if (packageMaps != null) {
+      return new PackageMapInfo(packageMaps[folder.path], dependencies);
+    }
+    return new PackageMapInfo(packageMap, dependencies);
+  }
+
+  noSuchMethod(Invocation invocation) {
+    // No other methods should be called.
+    return super.noSuchMethod(invocation);
+  }
+}
+
 class MockParameterElement extends TypedMock implements ParameterElement {
   final ElementKind kind = ElementKind.PARAMETER;
 }
 
 class MockPropertyAccessorElement extends TypedMock
     implements PropertyAccessorElement {
   final ElementKind kind;
   MockPropertyAccessorElement(this.kind);
 }
 
@@ skipping 250 matching lines @@
     }
     return mismatchDescription;
   }
 
   @override
   bool matches(item, Map matchState) {
     Response response = item;
     return response != null && response.id == _id && response.error == null;
   }
 }