Update Element/navigation/outline to use Location.

pkg/analysis_server/test/abstract_context.dart

+// Copyright (c) 2014, 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.
+
+library test.index;
+
+import 'package:analysis_server/src/resource.dart';
+import 'package:analyzer/src/generated/ast.dart';
+import 'package:analyzer/src/generated/element.dart';
+import 'package:analyzer/src/generated/engine.dart';
+import 'package:analyzer/src/generated/sdk.dart';
+import 'package:analyzer/src/generated/source_io.dart';
+
+import 'mocks.dart';
+import 'reflective_tests.dart';
+
+
+/**
+ * Finds an [engine.Element] with the given [name].
+ */
+Element findElementInUnit(CompilationUnit unit, String name, [ElementKind kind])
+    {
+  Element result = null;
+  unit.element.accept(new _ElementVisitorFunctionWrapper((Element element) {
+    if (element.name != name) {
+      return;
+    }
+    if (kind != null && element.kind != kind) {
+      return;
+    }
+    result = element;
+  }));
+  return result;
+}
+
+
+/**
+ * A function to be called for every [Element].
+ */
+typedef void _ElementVisitorFunction(Element element);
+
+
+@ReflectiveTestCase()
+class AbstractContextTest {
+  static final DartSdk SDK = new MockSdk();
+
+  AnalysisContext context;
+  MemoryResourceProvider provider = new MemoryResourceProvider();
+
+  Source addSource(String path, String content) {
+    File file = provider.newFile(path, content);
+    Source source = file.createSource(UriKind.FILE_URI);
+    ChangeSet changeSet = new ChangeSet();
+    changeSet.addedSource(source);
+    context.applyChanges(changeSet);
+    context.setContents(source, content);
+    return source;
+  }
+
+  CompilationUnit resolveLibraryUnit(Source source) {
+    return context.resolveCompilationUnit2(source, source);
+  }
+
+  void setUp() {
+    context = AnalysisEngine.instance.createAnalysisContext();
+    context.sourceFactory = new SourceFactory(<UriResolver>[new DartUriResolver(
+        SDK), new ResourceUriResolver(provider)]);
+  }
+
+  void tearDown() {
+    context = null;
+    provider = null;
+  }
+}
+
+
+/**
+ * Wraps the given [_ElementVisitorFunction] into an instance of
+ * [engine.GeneralizingElementVisitor].
+ */
+class _ElementVisitorFunctionWrapper extends GeneralizingElementVisitor {
+  final _ElementVisitorFunction function;
+  _ElementVisitorFunctionWrapper(this.function);
+  visitElement(Element element) {
+    function(element);
+    super.visitElement(element);
+  }
+}