Refactor unittests

tests/compiler/dart2js/zero_termination_test.dart

 // Copyright (c) 2015, 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.
 
 // A regression test for issue 22667.
 //
 // Makes sure that we don't print a '\0' character for files that are not
 // properly new-line terminated.
 library zero_termination_test;
 
@@ skipping 49 matching lines @@
   String stdoutString = UTF8.decode(stdout);
   Expect.isTrue(stdoutString.contains("Error"));
   // Make sure the "499" from the last line is in the output.
   Expect.isTrue(stdoutString.contains("499"));
 
   // Make sure that the output does not contain any 0 character.
   Expect.isFalse(stdout.contains(0));
 }
 
 Future testFile() async {
-  String inFilePath = pathOfData.resolve('one_line_dart_program.dart').path;
+  String inFilePath =
+      pathOfData.resolve('data/one_line_dart_program.dart').path;
   List<String> args = [inFilePath, "--out=" + outFilePath];
 
   await cleanup();
   check(await launchDart2Js(args));
   await cleanup();
 }
 
 Future serverRunning(HttpServer server) async {
   int port = server.port;
-  String inFilePath = "http://127.0.0.1:$port/one_line_dart_program.dart";
+  String inFilePath = "http://127.0.0.1:$port/data/one_line_dart_program.dart";
   List<String> args = [inFilePath, "--out=" + outFilePath];
 
   server.listen(handleRequest);
   try {
     await cleanup();
     check(await launchDart2Js(args));
   } finally {
     await server.close();
     await cleanup();
   }
@@ skipping 13 matching lines @@
     await testHttp();
   } finally {
     await tempDir.delete(recursive:true);
   }
 }
 
 main() {
   asyncStart();
   runTests().whenComplete(asyncEnd);
 }