Skip missing translations when generating JSON resources.

tools/grit/grit/format/chrome_messages_json_unittest.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.
 
 """Unittest for chrome_messages_json.py.
 """
 
 import os
 import sys
@@ skipping 90 matching lines @@
   def testTranslations(self):
     root = util.ParseGrdForUnittest("""
     <messages>
         <message name="ID_HELLO">Hello!</message>
         <message name="ID_HELLO_USER">Hello <ph name="USERNAME">%s<ex>
           Joi</ex></ph></message>
       </messages>
     """)
 
     buf = StringIO.StringIO()
-    build.RcBuilder.ProcessNode(root, DummyOutput('chrome_messages_json', 'fr'), buf)
+    build.RcBuilder.ProcessNode(root, DummyOutput('chrome_messages_json', 'fr'),
+                                buf)
     output = buf.getvalue()
     test = u"""
 {
   "ID_HELLO": {
     "message": "H\\u00e9P\\u00e9ll\\u00f4P\\u00f4!"
   },
   "ID_HELLO_USER": {
     "message": "H\\u00e9P\\u00e9ll\\u00f4P\\u00f4 %s"
   }
 }
 """
     self.assertEqual(test.strip(), output.strip())
+
+  def testSkipMissingTranslations(self):
+    grd = """<?xml version="1.0" encoding="UTF-8"?>
+<grit latest_public_release="2" current_release="3" source_lang_id="en"
+    base_dir="%s">
+  <outputs>
+  </outputs>
+  <release seq="3" allow_pseudo="False">
+    <messages fallback_to_english="true">
+      <message name="ID_HELLO_NO_TRANSLATION">Hello not translated</message>
+    </messages>
+  </release>
+</grit>"""
+    root = grd_reader.Parse(StringIO.StringIO(grd), dir=".")
+
+    buf = StringIO.StringIO()
+    build.RcBuilder.ProcessNode(root, DummyOutput('chrome_messages_json', 'fr'),
+                                buf)
+    output = buf.getvalue()
+    test = u"""
+{
+
+}
+"""
+    self.assertEqual(test.strip(), output.strip())
 
 
 class DummyOutput(object):
 
   def __init__(self, type, language):
     self.type = type
     self.language = language
 
   def GetType(self):
     return self.type
 
   def GetLanguage(self):
     return self.language
 
   def GetOutputFilename(self):
     return 'hello.gif'
 
 
 if __name__ == '__main__':
   unittest.main()