[Findit] Initial code of findit for crash. Add scorers to apply heuristic rules.

appengine/findit/crash/scorers/test/top_frame_index_test.py

Index: appengine/findit/crash/scorers/test/top_frame_index_test.py
diff --git a/appengine/findit/crash/scorers/test/top_frame_index_test.py b/appengine/findit/crash/scorers/test/top_frame_index_test.py
new file mode 100644
index 0000000000000000000000000000000000000000..ae4870b6b3c6042af71c6adb84023e6b14ce0585
--- /dev/null
+++ b/appengine/findit/crash/scorers/test/top_frame_index_test.py
@@ -0,0 +1,55 @@
+# Copyright 2016 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.
+
+from testing_utils import testing
+
+from common.change_log import ChangeLog
+from crash.callstack import StackFrame
+from crash.results import MatchResult
+from crash.scorers.top_frame_index import TopFrameIndex
+
+DUMMY_CHANGELOG = ChangeLog.FromDict({

[stgao, 2016/04/15 18:35:19]

This is repeated for quite a few times, could it be shared?

[Sharu, 2016/04/15 22:59:47]

Yes, created a scorer_test_suite

+    'author_name': 'r@chromium.org',
+    'message': 'dummy',
+    'committer_email': 'r@chromium.org',
+    'commit_position': 175900,
+    'author_email': 'r@chromium.org',
+    'touched_files': [
+        {
+            'change_type': 'add',
+            'new_path': 'a.cc',
+            'old_path': None,
+        },
+    ],
+    'author_time': 'Thu Mar 31 21:24:43 2016',
+    'committer_time': 'Thu Mar 31 21:28:39 2016',
+    'commit_url':
+        'https://repo.test/+/1',
+    'code_review_url': 'https://codereview.chromium.org/3281',
+    'committer_name': 'example@chromium.org',
+    'revision': '1',
+    'reverted_revision': None
+})
+
+
+class TopFrameIndexTest(testing.AppengineTestCase):
+
+  def testGetMetric(self):
+    result = MatchResult(DUMMY_CHANGELOG, 'src/', '')
+    self.assertEqual(TopFrameIndex().GetMetric(result), None)
+
+    result.file_to_stack_infos = {
+        'a.cc': [(StackFrame(0, 'src/', '', 'func', 'a.cc', [7]), 0)]
+    }
+    self.assertEqual(TopFrameIndex().GetMetric(result), 0)
+
+  def testScore(self):
+    self.assertEqual(TopFrameIndex().Score(0), 1)
+    self.assertEqual(TopFrameIndex().Score(30), 0)
+
+  def testReason(self):
+    self.assertEqual(TopFrameIndex().Reason(0, 1),
+                     'Top frame changed is frame #0')
+    self.assertEqual(TopFrameIndex().Reason(30, 0),
+                     '')