Deoptimize Search - request a new resolved unit for local search.

pkg/analyzer/test/src/dart/analysis/base.dart

 // Copyright (c) 2016, 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.
 
 import 'dart:async';
 
+import 'package:analyzer/dart/element/element.dart';
+import 'package:analyzer/dart/element/visitor.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
 import 'package:analyzer/src/dart/analysis/byte_store.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer/src/dart/analysis/file_state.dart';
 import 'package:analyzer/src/dart/analysis/status.dart';
 import 'package:analyzer/src/generated/engine.dart' show AnalysisOptionsImpl;
 import 'package:analyzer/src/generated/source.dart';
 import 'package:test/test.dart';
 
 import '../../context/mock_sdk.dart';
 
+/**
+ * Finds an [Element] with the given [name].
+ */
+Element findChildElement(Element root, String name, [ElementKind kind]) {
+  Element result = null;
+  root.accept(new _ElementVisitorFunctionWrapper((Element element) {
+    if (element.name != name) {
+      return;
+    }
+    if (kind != null && element.kind != kind) {
+      return;
+    }
+    result = element;
+  }));
+  return result;
+}
+
+typedef bool Predicate<E>(E argument);
+
+/**
+ * A function to be called for every [Element].
+ */
+typedef void _ElementVisitorFunction(Element element);
+
 class BaseAnalysisDriverTest {
   static final MockSdk sdk = new MockSdk();
 
   final MemoryResourceProvider provider = new MemoryResourceProvider();
   final ByteStore byteStore = new MemoryByteStore();
   final FileContentOverlay contentOverlay = new FileContentOverlay();
 
   final StringBuffer logBuffer = new StringBuffer();
   PerformanceLog logger;
 
@@ skipping 71 matching lines @@
       if (status.isIdle) {
         idleStatusMonitor.notify();
       }
     });
     driver.results.listen(allResults.add);
   }
 
   String _p(String path) => provider.convertPath(path);
 }
 
+/**
+ * Wraps an [_ElementVisitorFunction] into a [GeneralizingElementVisitor].
+ */
+class _ElementVisitorFunctionWrapper extends GeneralizingElementVisitor {
+  final _ElementVisitorFunction function;
+
+  _ElementVisitorFunctionWrapper(this.function);
+
+  visitElement(Element element) {
+    function(element);
+    super.visitElement(element);
+  }
+}
+
 class _Monitor {
   Completer<Null> _completer = new Completer<Null>();
 
   Future<Null> get signal async {
     await _completer.future;
     _completer = new Completer<Null>();
   }
 
   void notify() {
     if (!_completer.isCompleted) {
       _completer.complete(null);
     }
   }
 }