Intial checkin of layout test analyzer.

media/tools/layout_tests/trend_graph_unittest.py

+#!/usr/bin/python
+# Copyright (c) 2011 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 unittest
+import shutil
+import os

[dennis_jeffrey, 2011/08/25 00:36:46]

Reverse the order of the above 3 lines to put them in alphabetical order

[imasaki1, 2011/08/25 23:57:03]

Done.

+
+from trend_graph import TrendGraph
+
+
+class TestTrendGraph(unittest.TestCase):
+
+  def testUpdate(self):
+    test_graph_file_path = os.path.join('test_data', 'graph.html')
+    test_graph_file_backup_path = os.path.join('test_data', 'graph.html.bk')
+    shutil.copyfile(test_graph_file_path, test_graph_file_backup_path)
+    trend_graph = TrendGraph(test_graph_file_path)
+    data_map = {}
+    data_map['whole'] = (str(1), 'undefined', 'undefined')
+    data_map['skip'] = (str(2), 'undefined', 'undefined')
+    data_map['nonskip'] = (str(3), 'undefined', 'undefined')
+    data_map['passingrate'] = (str(4), 'undefined', 'undefined')
+
+    trend_graph.Update('2008,1,1,13,45,00', data_map)
+    # Assert the result graph from the file.
+    f = open(test_graph_file_path)
+    lines2 = f.readlines()
+    f.close()
+    lineCount = 0
+    for line in lines2:
+      if '2008,1,1,13,45,00' in line:
+        lineCount += 1
+    self.assertEqual(lineCount, 2)
+    # Recover the original file.
+    shutil.copyfile(test_graph_file_backup_path, test_graph_file_path)

[dennis_jeffrey, 2011/08/25 00:36:46]

It's hacky to save the original graph file and then revert back to the original
file again here.  It's also problematic: if the test fails at line 35 above, we
won't get to the current line, and so we'll never revert back to the original
graph file.  I think that not checking in the graph file may be a better
solution here: we only dynamically generate the file when we need to.  There's
no original graph file checked in that we need to maintain.

[imasaki1, 2011/08/25 23:57:03]

Created back up file and changed the code to copy from back up from at the 
beginning of the tests. 

[dennis_jeffrey, 2011/08/26 19:01:26]

This is better, but the approach of having a backup file that we have to copy
over still seems a little awkward.  If there's no other clear alternative, maybe
it's ok as is.