Simplify handling of pathnames in integration tests.

pkg/analysis_server/test/integration/completion_domain_int_test.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.integration.completion.domain;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_testing/reflective_tests.dart';
 import 'package:unittest/unittest.dart';
 
 import 'integration_tests.dart';
 
 @ReflectiveTestCase()
 class CompletionDomainIntegrationTest extends
     AbstractAnalysisServerIntegrationTest {
   fail_test_getSuggestions_string_var() {
     // See dartbug.com/20188
-    String filename = 'test.dart';
-    String pathname = normalizePath(filename);
+    String pathname = sourcePath('test.dart');
     String text =
         r'''
 var test = '';
 main() {
   test.
 }
 ''';
-    writeFile(filename, text);
-    setAnalysisRoots(['']);
+    writeFile(pathname, text);
+    standardAnalysisRoot();
 
     return analysisFinished.then((_) {
       return server.send(COMPLETION_GET_SUGGESTIONS, {
         'file': pathname,
         'offset': text.indexOf('test.') + 'test.'.length
       }).then((result) {
         // Since the feature doesn't work yet, just pause for a second to
         // collect the output of the analysis server, and then stop the test.
         // TODO(paulberry): finish writing the integration test once the feature
         // it more complete.
         return new Future.delayed(new Duration(seconds: 1), () {
           fail('test not completed yet');
         });
       });
     });
   }
 
   test_placeholder() {
     // The unit test framework freaks out if there are no tests, so this is a
     // placeholder until we have a passing test.
     // TODO(paulberry): remove this.
   }
 }
 
 main() {
   runReflectiveTests(CompletionDomainIntegrationTest);
 }