1 files changed, 73 insertions, 0 deletions
diff --git a/taskcluster/taskgraph/test/test_files_changed.py b/taskcluster/taskgraph/test/test_files_changed.py
new file mode 100644
index 000000000..0e3366b3c
--- /dev/null
+++ b/taskcluster/taskgraph/test/test_files_changed.py
@@ -0,0 +1,73 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from __future__ import absolute_import, print_function, unicode_literals
+
+import json
+import os
+import unittest
+
+from .. import files_changed
+
+PARAMS = {
+    'head_repository': 'https://hg.mozilla.org/mozilla-central',
+    'head_rev': 'a14f88a9af7a',
+}
+
+FILES_CHANGED = [
+    'devtools/client/debugger/new/index.html',
+    'devtools/client/inspector/test/browser_inspector_highlighter-eyedropper-events.js',
+    'devtools/client/inspector/test/head.js',
+    'devtools/client/themes/rules.css',
+    'devtools/client/webconsole/test/browser_webconsole_output_06.js',
+    'devtools/server/actors/highlighters/eye-dropper.js',
+    'devtools/server/actors/object.js',
+    'docshell/base/nsDocShell.cpp',
+    'dom/tests/mochitest/general/test_contentViewer_overrideDPPX.html',
+    'taskcluster/scripts/builder/build-l10n.sh',
+]
+
+
+class FakeResponse:
+
+    def json(self):
+        with open(os.path.join(os.path.dirname(__file__), 'automationrelevance.json')) as f:
+            return json.load(f)
+
+
+class TestGetChangedFiles(unittest.TestCase):
+
+    def setUp(self):
+        files_changed._cache.clear()
+        self.old_get = files_changed.requests.get
+
+        def fake_get(url, **kwargs):
+            return FakeResponse()
+        files_changed.requests.get = fake_get
+
+    def tearDown(self):
+        files_changed.requests.get = self.old_get
+
+    def test_get_changed_files(self):
+        """Get_changed_files correctly gets the list of changed files in a push.
+        This tests against the production hg.mozilla.org so that it will detect
+        any changes in the format of the returned data."""
+        self.assertEqual(
+            sorted(files_changed.get_changed_files(PARAMS['head_repository'], PARAMS['head_rev'])),
+            FILES_CHANGED)
+
+
+class TestCheck(unittest.TestCase):
+
+    def setUp(self):
+        files_changed._cache[PARAMS['head_repository'], PARAMS['head_rev']] = FILES_CHANGED
+
+    def test_check_no_params(self):
+        self.assertTrue(files_changed.check({}, ["ignored"]))
+
+    def test_check_no_match(self):
+        self.assertFalse(files_changed.check(PARAMS, ["nosuch/**"]))
+
+    def test_check_match(self):
+        self.assertTrue(files_changed.check(PARAMS, ["devtools/**"]))