Fix cross-partition dependency handling (issue 26466)

pkg/analyzer/test/generated/engine_test.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 analyzer.test.generated.engine_test;
 
 import 'dart:async';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
@@ skipping 172 matching lines @@
   void assertNoMoreEvents() {
     expect(actualEvents, []);
   }
 
   void onData(SourcesChangedEvent event) {
     actualEvents.add(event);
   }
 }
 
 /**
- * Instances of the class `TestAnalysisContext` implement an analysis context in which every
- * method will cause a test to fail when invoked.
+ * An analysis context in which almost every method will cause a test to fail
+ * when invoked.
  */
 class TestAnalysisContext implements InternalAnalysisContext {
   @override
+  final ReentrantSynchronousStream<InvalidatedResult> onResultInvalidated =
+      new ReentrantSynchronousStream<InvalidatedResult>();
+
+  @override
   ResultProvider resultProvider;
 
   @override
   AnalysisCache get analysisCache {
     fail("Unexpected invocation of analysisCache");
     return null;
   }
 
   @override
   AnalysisOptions get analysisOptions {
@@ skipping 480 matching lines @@
   bool validateCacheConsistency() {
     fail("Unexpected invocation of validateCacheConsistency");
     return false;
   }
 
   @override
   void visitContentCache(ContentCacheVisitor visitor) {
     fail("Unexpected invocation of visitContentCache");
   }
 }