[Findit] Add a Rietveld client to post a message to codereview of a culprit.

appengine/findit/common/test/rietveld_test.py

Index: appengine/findit/common/test/rietveld_test.py
diff --git a/appengine/findit/common/test/rietveld_test.py b/appengine/findit/common/test/rietveld_test.py
new file mode 100644
index 0000000000000000000000000000000000000000..50fb15e1f64333cfc39cf8a5b96834e509a37455
--- /dev/null
+++ b/appengine/findit/common/test/rietveld_test.py
@@ -0,0 +1,110 @@
+# 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.
+
+import textwrap
+
+from testing_utils import testing
+
+from common import retry_http_client
+from common.rietveld import Rietveld
+
+
+class DummyHttpClient(retry_http_client.RetryHttpClient):
+
+  def __init__(self):
+    super(DummyHttpClient, self).__init__()
+    self.responses = {}
+    self.requests = []
+
+  def SetResponse(self, url, result):
+    self.responses[url] = result
+
+  def GetBackoff(self, *_):  # pragma: no cover
+    """Override to avoid sleep."""
+    return 0
+
+  def _Get(self, *_):  # pragma: no cover
+    pass
+
+  def _Post(self, url, data, _, headers):
+    self.requests.append((url, data, headers))
+    return self.responses.get(url, (404, 'Not Found'))
+
+  def _Put(self, *_):  # pragma: no cover
+    pass
+
+
+class RietveldTest(testing.AppengineTestCase):
+
+  def setUp(self):
+    super(RietveldTest, self).setUp()
+    self.http_client = DummyHttpClient()
+    self.rietveld = Rietveld()
+    self.rietveld.HTTP_CLIENT = self.http_client
+
+  def testGetXsrfTokenSuccess(self):
+    rietveld_url = 'https://test'
+    self.http_client.SetResponse('%s/xsrf_token' % rietveld_url, (200, 'abc'))
+    self.assertEqual('abc', self.rietveld._GetXsrfToken(rietveld_url))
+    self.assertEqual(1, len(self.http_client.requests))
+    _, _, headers = self.http_client.requests[0]
+    self.assertTrue('X-Requesting-XSRF-Token' in headers)
+
+  def testGetXsrfTokenFailure(self):
+    rietveld_url = 'https://test'
+    self.http_client.SetResponse('%s/xsrf_token' % rietveld_url, (302, 'login'))
+    self.assertIsNone(self.rietveld._GetXsrfToken(rietveld_url))
+
+  def testGetRietveldUrlAndIssueNumber(self):
+    cases = {
+        'http://abc/123': '123',
+        'https://abc/456/': '456',
+        'http://abc/789/diff': '789',
+    }
+    for issue_url, expected_issue_number in cases.iteritems():
+      rietveld_url, issue_number = self.rietveld._GetRietveldUrlAndIssueNumber(
+          issue_url)
+      self.assertEqual('https://abc', rietveld_url)
+      self.assertEqual(expected_issue_number, issue_number)
+
+  def testEncodeMultipartFormData(self):
+    content_type, body = self.rietveld._EncodeMultipartFormData({'a':'b'})
+    expected_content_type = (
+        'multipart/form-data; boundary=-F-I-N-D-I-T-M-E-S-S-A-G-E-')
+    expected_body = textwrap.dedent("""
+    ---F-I-N-D-I-T-M-E-S-S-A-G-E-\r
+    Content-Disposition: form-data; name="a"\r
+    \r
+    b\r
+    ---F-I-N-D-I-T-M-E-S-S-A-G-E---\r
+    """)[1:]
+    self.assertEqual(expected_content_type, content_type)
+    self.assertEqual(expected_body, body)
+
+  def testPostMessageSuccess(self):
+    rietveld_url = 'https://test'
+    issue_url = '%s/123' % rietveld_url
+    message_publish_url = '%s/publish' % issue_url
+    self.http_client.SetResponse('%s/xsrf_token' % rietveld_url, (200, 'abc'))
+    self.http_client.SetResponse(message_publish_url, (200, 'OK'))
+    self.assertTrue(self.rietveld.PostMessage(issue_url, 'message'))
+    self.assertEqual(2, len(self.http_client.requests))
+
+  def testPostMessageFailOnXsrfToken(self):
+    rietveld_url = 'https://test'
+    issue_url = '%s/123' % rietveld_url
+    message_publish_url = '%s/publish' % issue_url
+    self.http_client.SetResponse('%s/xsrf_token' % rietveld_url, (302, 'login'))
+    self.http_client.SetResponse(message_publish_url, (200, 'OK'))
+    self.assertFalse(self.rietveld.PostMessage(issue_url, 'message'))
+    self.assertEqual(1, len(self.http_client.requests))
+
+  def testPostMessageFailOnPublish(self):
+    rietveld_url = 'https://test'
+    issue_url = '%s/123' % rietveld_url
+    message_publish_url = '%s/publish' % issue_url
+    self.http_client.SetResponse('%s/xsrf_token' % rietveld_url, (302, 'login'))
+    self.http_client.SetResponse(message_publish_url, (429, 'Error'))
+    self.assertFalse(self.rietveld.PostMessage(issue_url, 'message'))
+    self.assertEqual(1, len(self.http_client.requests))