Share LibrarySpecificUnits when possible

pkg/analyzer/test/src/task/options_work_manager_test.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 analyzer.test.src.task.options_work_manager_test;
 
 import 'package:analyzer/src/context/cache.dart';
 import 'package:analyzer/src/generated/engine.dart'
     show
         AnalysisEngine,
@@ skipping 60 matching lines @@
     cache = context.analysisCache;
     manager = new OptionsWorkManager(context);
     source1 = new TestSource('test1/$optionsFile');
     source2 = new TestSource('test2/$optionsFile');
     source3 = new TestSource('test3/$optionsFile');
     source4 = new TestSource('test4/$optionsFile');
     entry1 = context.getCacheEntry(source1);
     entry2 = context.getCacheEntry(source2);
     entry3 = context.getCacheEntry(source3);
     entry4 = context.getCacheEntry(source4);
+    when(context.canonicalizeTarget(anyObject)).thenInvoke((target) => target);
   }
 
   void test_applyChange_add() {
     // add source1
     manager.applyChange([source1], [], []);
     expect_sourceQueue([source1]);
     // add source2
     manager.applyChange([source2], [], []);
     expect_sourceQueue([source1, source2]);
   }
@@ skipping 199 matching lines @@
       errors = getCacheEntry(source).getValue(ANALYSIS_OPTIONS_ERRORS);
     }
     return new AnalysisErrorInfoImpl(
         errors, getCacheEntry(source).getValue(LINE_INFO));
   }
 
   @override
   ChangeNoticeImpl getNotice(Source source) =>
       _pendingNotices.putIfAbsent(source, () => new ChangeNoticeImpl(source));
 }