Stop depending of visiting LocalVariableElement(s) in Executableelement.visitChildren().

pkg/analysis_server/test/abstract_single_unit.dart

Index: pkg/analysis_server/test/abstract_single_unit.dart
diff --git a/pkg/analysis_server/test/abstract_single_unit.dart b/pkg/analysis_server/test/abstract_single_unit.dart
index 30d66dd50cfa3f44667f78c50b2072368d29126e..86601445dfe60a868d888d618395be6fc09613b6 100644
--- a/pkg/analysis_server/test/abstract_single_unit.dart
+++ b/pkg/analysis_server/test/abstract_single_unit.dart
@@ -5,6 +5,7 @@
 import 'dart:async';
 
 import 'package:analyzer/dart/ast/ast.dart';
+import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
@@ -46,6 +47,19 @@ class AbstractSingleUnitTest extends AbstractContextTest {
     return findNodeAtString(search, (node) => node is SimpleIdentifier);
   }
 
+  /**
+   * Search the [testUnit] for the [LocalVariableElement] with the given [name].
+   * Fail if there is not exactly one such variable.
+   */
+  LocalVariableElement findLocalVariable(String name) {
+    var finder = new _ElementsByNameFinder(name);
+    testUnit.accept(finder);
+    List<Element> localVariables =
+        finder.elements.where((e) => e is LocalVariableElement).toList();
+    expect(localVariables, hasLength(1));
+    return localVariables[0];
+  }
+
   AstNode findNodeAtOffset(int offset, [Predicate<AstNode> predicate]) {
     AstNode result = new NodeLocator(offset).searchWithin(testUnit);
     if (result != null && predicate != null) {
@@ -114,3 +128,17 @@ class AbstractSingleUnitTest extends AbstractContextTest {
     testLibraryElement = testUnitElement.library;
   }
 }
+
+class _ElementsByNameFinder extends RecursiveAstVisitor<Null> {
+  final String name;
+  final List<Element> elements = [];
+
+  _ElementsByNameFinder(this.name);
+
+  @override
+  visitSimpleIdentifier(SimpleIdentifier node) {
+    if (node.name == name && node.inDeclarationContext()) {
+      elements.add(node.staticElement);
+    }
+  }
+}