Issue 25101. Flush TOKEN_STREAM after computing PARSED_UNIT.

pkg/analyzer/test/src/task/dart_test.dart

Index: pkg/analyzer/test/src/task/dart_test.dart
diff --git a/pkg/analyzer/test/src/task/dart_test.dart b/pkg/analyzer/test/src/task/dart_test.dart
index 3fecdd141ba8332f1e005dc9591d638811fd3616..f39d8f9ef0ccba4643e2e595868454e6c60b4520 100644
--- a/pkg/analyzer/test/src/task/dart_test.dart
+++ b/pkg/analyzer/test/src/task/dart_test.dart
@@ -2913,6 +2913,13 @@ part 'test.dart';
     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;