[Findit] Add three sub-pipelines to analyze build failure.

appengine/findit/waterfall/test/pull_changelog_pipeline_test.py

Index: appengine/findit/waterfall/test/pull_changelog_pipeline_test.py
diff --git a/appengine/findit/waterfall/test/pull_changelog_pipeline_test.py b/appengine/findit/waterfall/test/pull_changelog_pipeline_test.py
new file mode 100644
index 0000000000000000000000000000000000000000..88e7f75229c558abaa06c203427c024d0a8a713c
--- /dev/null
+++ b/appengine/findit/waterfall/test/pull_changelog_pipeline_test.py
@@ -0,0 +1,87 @@
+# Copyright 2015 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 pipeline_utils.appengine_third_party_pipeline_src_pipeline import handlers
+from testing_utils import testing
+
+from waterfall.pull_changelog_pipeline import PullChangelogPipeline
+
+
+REV1_COMMIT_LOG = """)]}'
+{
+  "commit": "rev1",
+  "tree": "tree_rev",
+  "parents": [
+    "rev0"
+  ],
+  "author": {
+    "name": "someone@chromium.org",
+    "email": "someone@chromium.org",
+    "time": "Wed Jun 11 19:35:32 2014"
+  },
+  "committer": {
+    "name": "someone@chromium.org",
+    "email": "someone@chromium.org",
+    "time": "Wed Jun 11 19:35:32 2014"
+  },
+  "message": "git-svn-id: svn://svn.chromium.org/chromium/src@175976 blabla",
+  "tree_diff": [
+    {
+      "type": "add",
+      "old_id": "id1",
+      "old_mode": 33188,
+      "old_path": "/dev/null",
+      "new_id": "id2",
+      "new_mode": 33188,
+      "new_path": "added_file.js"
+    }
+  ]
+}
+"""
+
+REV1_COMMIT_LOG_URL = ('https://chromium.googlesource.com/chromium/src'
+                       '/+/rev1?format=json')
+
+
+class PullChangelogPipelineTest(testing.AppengineTestCase):
+  app_module = handlers._APP
+
+  def testPullChangelogs(self):
+    with self.mock_urlfetch() as urlfetch:
+      urlfetch.register_handler(REV1_COMMIT_LOG_URL, REV1_COMMIT_LOG)
+
+    failure_info = {
+      'builds': {
+        '999': {
+          'blame_list': ['rev1']
+        }
+      }
+    }
+
+    expected_change_logs = {
+      "rev1": {
+        "author_name": "someone@chromium.org",
+        "message":
+          "git-svn-id: svn://svn.chromium.org/chromium/src@175976 blabla",
+        "committer_email": "someone@chromium.org",
+        "commit_position": 175976,
+        "author_email": "someone@chromium.org",
+        "touched_files": [
+          {
+            "new_path": "added_file.js",
+            "change_type": "add",
+            "old_path": "/dev/null"
+          }
+        ],
+        "author_time": "Wed Jun 11 19:35:32 2014",
+        "committer_time": "Wed Jun 11 19:35:32 2014",
+        "code_review_url": None,
+        "committer_name": "someone@chromium.org",
+        "revision": "rev1"
+      }
+    }
+
+    pipeline = PullChangelogPipeline(failure_info)
+    change_logs = pipeline.run(failure_info)
+    self.assertEqual(expected_change_logs, change_logs)