diff --git a/features/test/federated_test.py b/features/test/federated_test.py
new file mode 100644
index 0000000..1ba088a
--- /dev/null
+++ b/features/test/federated_test.py
@@ -0,0 +1,114 @@
+# Copyright 2019 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 or at
+# https://developers.google.com/open-source/licenses/bsd
+
+"""Unit tests for monorail.feature.federated."""
+
+from __future__ import print_function
+from __future__ import division
+from __future__ import absolute_import
+
+import unittest
+
+from features import federated
+from framework.exceptions import InvalidExternalIssueReference
+
+
+# Schema: tracker, shortlink.
+VALID_SHORTLINKS = [
+    ('google', 'b/1'),
+    ('google', 'b/123456'),
+    ('google', 'b/1234567890123')]
+
+
+# Schema: tracker, shortlink.
+INVALID_SHORTLINKS = [
+   ('google', 'b'),
+   ('google', 'b/'),
+   ('google', 'b//123'),
+   ('google', 'b/123/123')]
+
+
+class FederatedTest(unittest.TestCase):
+  """Test public module methods."""
+
+  def testIsShortlinkValid_Valid(self):
+    for _, shortlink in VALID_SHORTLINKS:
+      self.assertTrue(federated.IsShortlinkValid(shortlink),
+        'Expected %s to be a valid shortlink for any tracker.'
+        % shortlink)
+
+  def testIsShortlinkValid_Invalid(self):
+    for _, shortlink in INVALID_SHORTLINKS:
+      self.assertFalse(federated.IsShortlinkValid(shortlink),
+        'Expected %s to be an invalid shortlink for any tracker.'
+        % shortlink)
+
+  def testFromShortlink_Valid(self):
+    for _, shortlink in VALID_SHORTLINKS:
+      issue = federated.FromShortlink(shortlink)
+      self.assertEqual(shortlink, issue.shortlink, (
+          'Expected %s to be converted into a valid tracker object '
+          'with shortlink %s' % (shortlink, issue.shortlink)))
+
+  def testFromShortlink_Invalid(self):
+    for _, shortlink in INVALID_SHORTLINKS:
+      self.assertIsNone(federated.FromShortlink(shortlink))
+
+
+class FederatedIssueTest(unittest.TestCase):
+
+  def testInit_NotImplemented(self):
+    """By default, __init__ raises NotImplementedError.
+
+    Because __init__ calls IsShortlinkValid. See test below.
+    """
+    with self.assertRaises(NotImplementedError):
+      federated.FederatedIssue('a')
+
+  def testIsShortlinkValid_NotImplemented(self):
+    """By default, IsShortlinkValid raises NotImplementedError."""
+    with self.assertRaises(NotImplementedError):
+      federated.FederatedIssue('a').IsShortlinkValid('rutabaga')
+
+
+class GoogleIssueTrackerIssueTest(unittest.TestCase):
+
+  def setUp(self):
+    self.valid_shortlinks = [s for tracker, s in VALID_SHORTLINKS
+      if tracker == 'google']
+    self.invalid_shortlinks = [s for tracker, s in INVALID_SHORTLINKS
+      if tracker == 'google']
+
+  def testInit_ValidatesValidShortlink(self):
+    for shortlink in self.valid_shortlinks:
+      issue = federated.GoogleIssueTrackerIssue(shortlink)
+      self.assertEqual(issue.shortlink, shortlink)
+
+  def testInit_ValidatesInvalidShortlink(self):
+    for shortlink in self.invalid_shortlinks:
+      with self.assertRaises(InvalidExternalIssueReference):
+        federated.GoogleIssueTrackerIssue(shortlink)
+
+  def testIsShortlinkValid_Valid(self):
+    for shortlink in self.valid_shortlinks:
+      self.assertTrue(
+        federated.GoogleIssueTrackerIssue.IsShortlinkValid(shortlink),
+        'Expected %s to be a valid shortlink for Google.'
+        % shortlink)
+
+  def testIsShortlinkValid_Invalid(self):
+    for shortlink in self.invalid_shortlinks:
+      self.assertFalse(
+        federated.GoogleIssueTrackerIssue.IsShortlinkValid(shortlink),
+        'Expected %s to be an invalid shortlink for Google.'
+        % shortlink)
+
+  def testToURL(self):
+    self.assertEqual('https://issuetracker.google.com/issues/123456',
+        federated.GoogleIssueTrackerIssue('b/123456').ToURL())
+
+  def testSummary(self):
+    self.assertEqual('Google Issue Tracker issue 123456.',
+        federated.GoogleIssueTrackerIssue('b/123456').Summary())