Issue 25101. Flush TOKEN_STREAM after computing PARSED_UNIT.

pkg/analyzer/test/src/task/dart_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 test.src.task.dart_test;
 
 import 'package:analyzer/src/context/cache.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/constant.dart';
 import 'package:analyzer/src/generated/element.dart';
@@ skipping 2895 matching lines @@
     expect(outputs[EXPORTED_LIBRARIES], hasLength(0));
     _assertHasCore(outputs[IMPORTED_LIBRARIES], 1);
     expect(outputs[INCLUDED_PARTS], hasLength(0));
     expect(outputs[LIBRARY_SPECIFIC_UNITS], hasLength(1));
     expect(outputs[PARSE_ERRORS], hasLength(0));
     expect(outputs[PARSED_UNIT], isNotNull);
     expect(outputs[SOURCE_KIND], SourceKind.UNKNOWN);
     expect(outputs[UNITS], hasLength(1));
   }
 
+  test_perform_flushTokenStream() {
+    _performParseTask(r'''
+class Test {}
+''');
+    expect(analysisCache.getState(source, TOKEN_STREAM), CacheState.FLUSHED);
+  }
+
   test_perform_invalidDirectives() {
     _performParseTask(r'''
 library lib;
 import '/does/not/exist.dart';
 import '://invaliduri.dart';
 export '${a}lib3.dart';
 part 'part.dart';
 class A {}''');
     expect(outputs, hasLength(9));
     expect(outputs[EXPLICITLY_IMPORTED_LIBRARIES], hasLength(1));
@@ skipping 1659 matching lines @@
   /**
    * Fill [errorListener] with [result] errors in the current [task].
    */
   void _fillErrorListener(ResultDescriptor<List<AnalysisError>> result) {
     List<AnalysisError> errors = task.outputs[result];
     expect(errors, isNotNull, reason: result.name);
     errorListener = new GatheringErrorListener();
     errorListener.addAll(errors);
   }
 }