[Build System: update-checkout] Added a new run_test.py script to utils/update_checkout which is used to run the validation test.

Author: Ross Bayer

utils/update_checkout/run_tests.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python
+
+# This source file is part of the Swift.org open source project
+#
+# Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
+# Licensed under Apache License v2.0 with Runtime Library Exception
+#
+# See https://swift.org/LICENSE.txt for license information
+# See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+
+
+"""
+Small script used to easily run the update_checkout module unit tests.
+"""
+
+
+from __future__ import absolute_import, unicode_literals
+
+import os
+import shutil
+import sys
+import tempfile
+import unittest
+
+
+MODULE_DIR = os.path.abspath(os.path.dirname(__file__))
+UTILS_DIR = os.path.abspath(os.path.join(MODULE_DIR, os.pardir))
+
+
+if __name__ == '__main__':
+    # Add the swift/utils directory to the Python path.
+    sys.path.append(UTILS_DIR)
+
+    # Create temp directory and export it for the test suite.
+    temp_dir = tempfile.mkdtemp()
+    os.environ['UPDATECHECKOUT_TEST_WORKSPACE_DIR'] = temp_dir
+
+    # Discover all tests for the module.
+    module_tests = unittest.defaultTestLoader.discover(MODULE_DIR)
+
+    # Create and run test suite.
+    suite = unittest.TestSuite()
+    suite.addTests(module_tests)
+
+    runner = unittest.TextTestRunner()
+    try:
+        result = runner.run(suite)
+    finally:
+        # Ensure the temp directory is removed
+        shutil.rmtree(temp_dir, ignore_errors=True)
+
+    sys.exit(not result.wasSuccessful())

utils/update_checkout/test_update_checkout.sh

@@ -0,0 +1,8 @@
+// Continuous integration for the OS X Platform also runs the tests in the
+// iPhone, Apple TV and Apple Watch simulators. We only need to run the
+// update_checkout module unit-tests once per OSX Platform test run, rather
+// than once for each supported Apple device.
+
+// REQUIRES: OS=macosx
+
+// RUN: %{python} %utils/update_checkout/run_tests.py