Move MockSdk into tests.

lib/src/analysis.dart

 // Copyright (c) 2015, 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 linter.src.analysis;
 
 import 'dart:collection';
 import 'dart:io' as io;
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/file_system/file_system.dart'
     show File, ResourceUriResolver;
 import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/src/dart/sdk/sdk.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/java_io.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/services/lint.dart';
 import 'package:cli_util/cli_util.dart' as cli_util;
 import 'package:linter/src/io.dart';
 import 'package:linter/src/linter.dart';
 import 'package:linter/src/project.dart';
 import 'package:linter/src/rules.dart';
-import 'package:linter/src/sdk.dart';
 import 'package:package_config/packages.dart' show Packages;
 import 'package:package_config/packages_file.dart' as pkgfile show parse;
 import 'package:package_config/src/packages_impl.dart' show MapPackages;
 import 'package:path/path.dart' as p;
 import 'package:plugin/manager.dart';
 import 'package:plugin/plugin.dart';
 
 Source createSource(Uri sourceUri) {
   return PhysicalResourceProvider.INSTANCE
       .getFile(sourceUri.toFilePath())
@@ skipping 26 matching lines @@
   final LinterOptions options;
 
   AnalysisDriver(this.options) {
     _processPlugins();
   }
 
   /// Return the number of sources that have been analyzed so far.
   int get numSourcesAnalyzed => _sourcesAnalyzed.length;
 
   List<UriResolver> get resolvers {
-    DartSdk sdk = options.useMockSdk
-        ? new MockSdk()
-        : new FolderBasedDartSdk(PhysicalResourceProvider.INSTANCE,
+    DartSdk sdk = options.mockSdk ??
+        new FolderBasedDartSdk(PhysicalResourceProvider.INSTANCE,
             PhysicalResourceProvider.INSTANCE.getFolder(sdkDir));
 
     List<UriResolver> resolvers = [new DartUriResolver(sdk)];
 
     if (options.packageRootPath != null) {
       JavaFile packageDirectory = new JavaFile(options.packageRootPath);
       resolvers.add(new PackageUriResolver([packageDirectory]));
     }
 
     // File URI resolver must come last so that files inside "/lib" are
@@ skipping 141 matching lines @@
 
   /// The path to the package root.
   String packageRootPath;
 
   /// Whether to show SDK warnings.
   bool showSdkWarnings = false;
 
   /// Whether to use Dart's Strong Mode analyzer.
   bool strongMode = true;
 
-  /// Whether to use a mock SDK (to speed up testing).
-  bool useMockSdk = false;
+  /// The mock SDK (to speed up testing) or `null` to use the actual SDK.
+  DartSdk mockSdk;
 
   /// Whether to show lints for the transitive closure of imported and exported
   /// libraries.
   bool visitTransitiveClosure = false;
 }
 
 /// Prints logging information comments to the [outSink] and error messages to
 /// [errorSink].
 class StdLogger extends Logger {
   @override
   void logError(String message, [exception]) => errorSink.writeln(message);
   @override
   void logInformation(String message, [exception]) => outSink.writeln(message);
 }