Initial 'Extract Method' refactoring implementation.

pkg/analysis_testing/lib/abstract_single_unit.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.services.src.index.abstract_single_file;
 
 import 'package:analysis_testing/abstract_context.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/error.dart';
@@ skipping 43 matching lines @@
 
   Element findNodeElementAtString(String search,
       [Predicate<AstNode> predicate]) {
     AstNode node = findNodeAtString(search, predicate);
     if (node == null) {
       return null;
     }
     return ElementLocator.locate(node);
   }
 
+  int findEnd(String search) {
+    return findOffset(search) + search.length;
+  }
+
   int findOffset(String search) {
     int offset = testCode.indexOf(search);
     expect(offset, isNonNegative, reason: "Not found '$search' in\n$testCode");
     return offset;
   }
 
   int getLeadingIdentifierLength(String search) {
     int length = 0;
     while (length < search.length) {
       int c = search.codeUnitAt(length);
@@ skipping 18 matching lines @@
     testCode = code;
     testSource = addSource(testFile, code);
     testUnit = resolveLibraryUnit(testSource);
     if (verifyNoTestUnitErrors) {
       assertNoErrorsInSource(testSource);
     }
     testUnitElement = testUnit.element;
     testLibraryElement = testUnitElement.library;
   }
 }