Fix cross-partition dependency handling (issue 26466)

pkg/analyzer/test/generated/engine_test.dart

Index: pkg/analyzer/test/generated/engine_test.dart
diff --git a/pkg/analyzer/test/generated/engine_test.dart b/pkg/analyzer/test/generated/engine_test.dart
index f922d25a7c9c8a364d0d5d6ac8a6c85f926156cb..e679466f7925aff8af1304a4a5d83e6a6fe988e9 100644
--- a/pkg/analyzer/test/generated/engine_test.dart
+++ b/pkg/analyzer/test/generated/engine_test.dart
@@ -190,11 +190,15 @@ class SourcesChangedListener {
 }
 
 /**
- * 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