Simplify handling of pathnames in integration tests.

pkg/analysis_server/test/integration/server_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.server.domain;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_testing/reflective_tests.dart';
@@ skipping 31 matching lines @@
     server.onNotification(SERVER_STATUS).listen((_) {
       statusReceived = true;
     });
     server.onNotification(ANALYSIS_ERRORS).listen((_) {
       if (!analysisBegun.isCompleted) {
         analysisBegun.complete();
       }
     });
     return server_setSubscriptions([]).then((response) {
       expect(response, isNull);
-      writeFile('test.dart', '''
+      String pathname = sourcePath('test.dart');
+      writeFile(pathname, '''
 main() {
   var x;
 }''');
-      setAnalysisRoots(['']);
+      standardAnalysisRoot();
       // Analysis should begin, but no server.status notification should be
       // received.
       return analysisBegun.future.then((_) {
         expect(statusReceived, isFalse);
         return server_setSubscriptions(['STATUS']).then((_) {
           // Tickle test.dart just in case analysis has already completed.
-          writeFile('test.dart', '''
+          writeFile(pathname, '''
 main() {
   var y;
 }''');
           // Analysis should eventually complete, and we should be notified
           // about it.
           return analysisFinished;
         });
       });
     });
   }
@@ skipping 31 matching lines @@
       if (params['analysis'] != null) {
         if (params['analysis']['analyzing']) {
           expect(analysisBegun.isCompleted, isFalse);
           analysisBegun.complete();
         } else {
           expect(analysisFinished.isCompleted, isFalse);
           analysisFinished.complete();
         }
       }
     });
-    writeFile('test.dart', '''
+    writeFile(sourcePath('test.dart'), '''
 main() {
   var x;
 }''');
-    setAnalysisRoots(['']);
+    standardAnalysisRoot();
     expect(analysisBegun.isCompleted, isFalse);
     expect(analysisFinished.isCompleted, isFalse);
     return analysisBegun.future.then((_) {
       expect(analysisFinished.isCompleted, isFalse);
       return analysisFinished.future;
     });
   }
 }
 
 main() {
   runReflectiveTests(ServerDomainIntegrationTest);
 }