Converts absolute paths in the command to relative path.

tools/isolate/isolate_test.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import hashlib
 import json
 import logging
 import os
 import re
@@ skipping 114 matching lines @@
         # Trailing slash missing.
         'data',
     ]
     try:
       self._execute(cmd)
       self.fail()
     except subprocess.CalledProcessError:
       pass
     self._expected_tree([])
 
+  def test_check_abs_path(self):
+    cmd = [
+        '--mode', 'check',
+        'isolate_test.py',
+        '--',
+        os.path.join(ROOT_DIR, 'isolate_test.py'),
+    ]
+    self._execute(cmd)
+    self._expected_tree(['result'])
+    self._expected_result(
+        False, ['isolate_test.py'], ['isolate_test.py'], False)
+
   def test_hashtable(self):
     cmd = [
         '--mode', 'hashtable',
         '--outdir', self.tempdir,
         'isolate_test.py',
         'data/',
     ]
     self._execute(cmd)
     files = ['isolate_test.py', 'data/test_file1.txt', 'data/test_file2.txt']
     data = self._expected_result(True, files, ['./isolate_test.py'], False)
@@ skipping 49 matching lines @@
   if sys.argv[1] == '--ok':
     return 0
   if sys.argv[1] == '--fail':
     return 1
 
   unittest.main()
 
 
 if __name__ == '__main__':
   sys.exit(main())