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

appengine/findit/crash/test/crash_util_test.py

+# 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 crash import crash_util
+
+from testing_utils import testing
+
+
+class CrashUtilTest(testing.AppengineTestCase):
+
+  def testIsSameFilePath(self):
+    path_1 = 'third_party/a/b/c/file.cc'
+    path_2 = 'third_party/a/file.cc'
+
+    self.assertTrue(crash_util.IsSameFilePath(path_1, path_2))
+
+    path_1 = 'a/b/c/file.cc'
+    path_2 = 'a/b/c/file2.cc'
+
+    self.assertFalse(crash_util.IsSameFilePath(path_1, path_2))
+
+    path_1 = 'a/b/c/d/e/file.cc'
+    path_2 = 'f/g/file.cc'
+
+    self.assertFalse(crash_util.IsSameFilePath(path_1, path_2))