Flush memento objects.

pkg/analyzer/test/src/context/cache_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.driver_test;
 
 import 'package:analyzer/src/context/cache.dart';
 import 'package:analyzer/src/generated/engine.dart'
     show
         AnalysisContext,
@@ skipping 402 matching lines @@
     ResultCachingPolicy cachingPolicy = new SimpleResultCachingPolicy(2, 2);
     ResultDescriptor descriptor1 =
         new ResultDescriptor('result1', null, cachingPolicy: cachingPolicy);
     ResultDescriptor descriptor2 =
         new ResultDescriptor('result2', null, cachingPolicy: cachingPolicy);
     ResultDescriptor descriptor3 =
         new ResultDescriptor('result3', null, cachingPolicy: cachingPolicy);
     AnalysisTarget target = new TestSource();
     CacheEntry entry = new CacheEntry();
     cache.put(target, entry);
+    Object memento1 = 'aaa';
     {
-      entry.setValue(descriptor1, 1, TargetedResult.EMPTY_LIST, null);
+      entry.setValue(descriptor1, 1, TargetedResult.EMPTY_LIST, memento1);
       expect(entry.getState(descriptor1), CacheState.VALID);
+      expect(entry.getMemento(descriptor1), memento1);
     }
     {
       entry.setValue(descriptor2, 2, TargetedResult.EMPTY_LIST, null);
       expect(entry.getState(descriptor1), CacheState.VALID);
       expect(entry.getState(descriptor2), CacheState.VALID);
     }
     {
       entry.setValue(descriptor3, 3, TargetedResult.EMPTY_LIST, null);
       expect(entry.getState(descriptor1), CacheState.FLUSHED);
       expect(entry.getState(descriptor2), CacheState.VALID);
       expect(entry.getState(descriptor3), CacheState.VALID);
+      expect(entry.getMemento(descriptor1), isNull);
     }
   }
 
   test_setValue_invalidateDependent() {
     AnalysisTarget target = new TestSource();
     CacheEntry entry = new CacheEntry();
     cache.put(target, entry);
     ResultDescriptor result1 = new ResultDescriptor('result1', -1);
     ResultDescriptor result2 = new ResultDescriptor('result2', -2);
     ResultDescriptor result3 = new ResultDescriptor('result3', -3);
@@ skipping 263 matching lines @@
 
 @reflectiveTest
 class ResultDataTest extends EngineTestCase {
   test_creation() {
     String value = 'value';
     ResultData data = new ResultData(new ResultDescriptor('test', value));
     expect(data, isNotNull);
     expect(data.state, CacheState.INVALID);
     expect(data.value, value);
   }
+
+  test_flush() {
+    ResultDescriptor result = new ResultDescriptor('test', -1);
+    ResultData data = new ResultData(result);
+    data.state = CacheState.VALID;
+    data.value = 123;
+    data.memento = 'abc';
+    data.flush();
+    expect(data.state, CacheState.FLUSHED);
+    expect(data.value, -1);
+    expect(data.memento, isNull);
+  }
 }
 
 @reflectiveTest
 class SdkCachePartitionTest extends CachePartitionTest {
   CachePartition createPartition() {
     return new SdkCachePartition(null);
   }
 
   void test_contains_false() {
     CachePartition partition = createPartition();
@@ skipping 20 matching lines @@
     UniversalCachePartition partition = new UniversalCachePartition(null);
     TestSource source = new TestSource();
     expect(partition.contains(source), isTrue);
   }
 }
 
 class _InternalAnalysisContextMock extends TypedMock
     implements InternalAnalysisContext {
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }