Create ElementAnnotation objects prior to resolution.

pkg/analyzer/test/generated/resolver_test.dart

Index: pkg/analyzer/test/generated/resolver_test.dart
diff --git a/pkg/analyzer/test/generated/resolver_test.dart b/pkg/analyzer/test/generated/resolver_test.dart
index c05f4fdbcb7c4bae7573b26bdb3c0f9154a22a52..01b0b738002967785f5b0408c21ce6723c3972d8 100644
--- a/pkg/analyzer/test/generated/resolver_test.dart
+++ b/pkg/analyzer/test/generated/resolver_test.dart
@@ -1598,17 +1598,24 @@ class ElementResolverTest extends EngineTestCase {
   }
 
   void test_visitEnumDeclaration() {
+    CompilationUnitElementImpl compilationUnitElement =
+        ElementFactory.compilationUnit('foo.dart');
     ClassElementImpl enumElement =
         ElementFactory.enumElement(_typeProvider, ('E'));
+    compilationUnitElement.enums = <ClassElement>[enumElement];
     EnumDeclaration enumNode = AstFactory.enumDeclaration2('E', []);
     Annotation annotationNode =
         AstFactory.annotation(AstFactory.identifier3('a'));
     annotationNode.element = ElementFactory.classElement2('A');
+    annotationNode.elementAnnotation =
+        new ElementAnnotationImpl(compilationUnitElement);
     enumNode.metadata.add(annotationNode);
     enumNode.name.staticElement = enumElement;
+    List<ElementAnnotation> metadata = <ElementAnnotation>[
+      annotationNode.elementAnnotation
+    ];
     _resolveNode(enumNode);
-    List<ElementAnnotation> metadata = enumElement.metadata;
-    expect(metadata, hasLength(1));
+    expect(metadata[0].element, annotationNode.element);
   }
 
   void test_visitExportDirective_noCombinators() {