Add better logging when failing to load a test.

typ/json_results.py

 # Copyright 2014 Google Inc. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #    http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 133 matching lines @@
 def _actual_results_for_test(test_name, results):
     actuals = []
     for r in results.results:
         if r.name == test_name:
             if r.actual == ResultType.Failure:
                 actuals.append('FAIL')
             elif r.actual == ResultType.Pass:
                 actuals.append('PASS')
             elif r.actual == ResultType.Skip:
                 actuals.append('SKIP')
-    if not actuals:
+    if not actuals:  # pragma: untested
         actuals.append('SKIP')
     return ' '.join(actuals)
 
 
 def _add_path_to_trie(trie, path, value):
     if TEST_SEPARATOR not in path:
         trie[path] = value
         return
     directory, rest = path.split(TEST_SEPARATOR, 1)
     if directory not in trie:
@@ skipping 18 matching lines @@
                  'filename="full_results.json"')
     lines.append('Content-Type: application/json')
     lines.append('')
     lines.append(json.dumps(test_results))
 
     lines.append('--' + BOUNDARY + '--')
     lines.append('')
     body = CRLF.join(lines)
     content_type = 'multipart/form-data; boundary=%s' % BOUNDARY
     return content_type, body