Add CIPD pin reporting to swarming.

appengine/swarming/cipd_test.py

Index: appengine/swarming/cipd_test.py
diff --git a/appengine/swarming/cipd_test.py b/appengine/swarming/cipd_test.py
new file mode 100755
index 0000000000000000000000000000000000000000..da7b9e1f5fd136dab4d49157bd5a5d6aa46fc05b
--- /dev/null
+++ b/appengine/swarming/cipd_test.py
@@ -0,0 +1,84 @@
+#!/usr/bin/env python
+# coding: utf-8
+# Copyright 2016 The LUCI Authors. All rights reserved.
+# Use of this source code is governed under the Apache License, Version 2.0
+# that can be found in the LICENSE file.
+
+import collections
+import logging
+import re
+import sys
+import unittest
+
+# Setups environment.
+import test_env_handlers
+
+import cipd
+import swarming_rpcs
+
+
+class TestPinChecker(unittest.TestCase):
+  def setUp(self):
+    super(TestPinChecker, self).setUp()
+    self.cp = collections.namedtuple('CipdPackage', 'path package_name version')
+
+  def test_correct_pins(self):
+    a = self.cp('path', 'package_name/${platform}-${os_ver}', 'latest')
+    b = self.cp('path', 'package_name/windows-amd64-something_10', 'deadbeef'*5)
+
+    with cipd.pin_check_fn() as check:
+      # will not raise
+      check(a, b)
+
+      a = self.cp('path', 'other/${platform}-${os_ver}', 'latest')
+      b = self.cp('path', 'other/windows-amd64-something_10', 'deadbeef'*5)
+
+      # will not raise
+      check(a, b)
+
+  def test_mismatched_pins(self):
+    # if a is already a pin, b must match its version exactly
+    a = self.cp('path', 'package_name/${platform}-${os_ver}', 'deadbeef'*5)
+    b = self.cp('path', 'package_name/windows-amd64-something_10', 'badc0ffe'*5)
+
+    with cipd.pin_check_fn() as check:
+      with self.assertRaisesRegexp(ValueError, 'Mismatched pins'):
+        check(a, b)
+
+  def test_mismatched_paths(self):
+    a = self.cp('path', 'package_name/${platform}-${os_ver}', 'latest')
+    b = self.cp('else', 'package_name/windows-amd64-something_10', 'deadbeef'*5)
+
+    with cipd.pin_check_fn() as check:
+      with self.assertRaisesRegexp(ValueError, 'Mismatched path'):
+        check(a, b)
+
+  def test_mismatched_names(self):
+    a = self.cp('', 'package_name/${platform}-${os_ver}', 'latest')
+    b = self.cp('', 'else/windows-amd64-something_10', 'deadbeef'*5)
+
+    with cipd.pin_check_fn() as check:
+      with self.assertRaisesRegexp(ValueError, 'Mismatched package_name'):
+        check(a, b)
+
+    a = self.cp('', 'package_name/${platform}-${os_ver}', 'latest')
+    b = self.cp('', 'package_name/windows-amd64-something_10', 'deadbeef'*5)
+    # will not raise
+    check(a, b)
+
+    # This doesn't match the previous knowledge of platform or os_ver, so it
+    # will not match.
+    a = self.cp('', 'package_name/${platform}-${os_ver}', 'latest')
+    b = self.cp('', 'package_name/linux-32-nerds', 'deadbeef'*5)
+
+    with self.assertRaisesRegexp(ValueError, 'Mismatched package_name'):
+      check(a, b)
+
+
+if __name__ == '__main__':
+  if '-v' in sys.argv:
+    unittest.TestCase.maxDiff = None
+  logging.basicConfig(
+      level=logging.DEBUG if '-v' in sys.argv else logging.CRITICAL,
+      format='%(levelname)-7s %(filename)s:%(lineno)3d %(message)s')
+  unittest.main()