Add a simple test runner to execute test modules directly.

absltest requires running from main(), which isn't exactly compatible with stock unittest. Walk the package tree looking for modules under glazier named *_test and execute them inside subprocesses.

PiperOrigin-RevId: 240235406

.travis.yml

@@ -7,4 +7,4 @@ install:
   - pip install -r requirements.txt
 
 script:
-  - python -m unittest discover -s . -p '*_test.py'
+  - python -m testing.run_tests

testing/__init__.py

@@ -0,0 +1,13 @@
+# Copyright 2019 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.

testing/run_tests.py

@@ -0,0 +1,51 @@
+# Copyright 2019 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Locate *_test modules and run the tests in them."""
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import pkgutil
+import re
+import subprocess
+import sys
+
+import glazier
+
+FAILED_RE = re.compile(r'FAILED\s*\(errors=(\d*)\)')
+
+
+def main():
+  results = {'codes': {0: 0, 1: 0}, 'errors': 0}
+  for _, test, _ in pkgutil.walk_packages(glazier.__path__,
+                                          glazier.__name__ + '.'):
+    if '_test' in test:
+      print('**** %s ****\n' % test)
+      proc = subprocess.Popen(['python', '-m', test], stderr=subprocess.PIPE)
+      _, err = proc.communicate()
+      print(err)
+      failed = FAILED_RE.search(err)
+      if failed:
+        results['errors'] += int(failed.group(1))
+      results['codes'][proc.returncode] = results['codes'].setdefault(
+          proc.returncode, 0) + 1
+
+  print('Success: %s' % results['codes'][0])
+  print('Failure: %s' % results['codes'][1])
+  sys.exit(results['codes'][1])
+
+
+if __name__ == '__main__':
+  main()