--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/testall.py	Mon May 22 18:50:11 2017 -0700
@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+
+"""
+run all unit tests
+"""
+
+import os
+import sys
+import unittest
+
+here = os.path.dirname(os.path.abspath(__file__))
+
+def main(args=sys.argv[1:]):
+
+    results = unittest.TestResult()
+    suite = unittest.TestLoader().discover(here, 'test_*.py')
+    suite.run(results)
+    n_errors = len(results.errors)
+    n_failures = len(results.failures)
+    print ("Run {} tests ({} failures; {} errors)".format(results.testsRun,
+                                                          n_failures,
+                                                          n_errors))
+    if results.wasSuccessful():
+        print ("Success")
+        sys.exit(0)
+    else:
+        # print failures and errors
+        for label, item in (('FAIL', results.failures),
+                            ('ERROR', results.errors)):
+            if item:
+                print ("\n{}::\n".format(label))
+                for index, (i, message) in enumerate(item):
+                    print ('{})  {}:'.format(index, str(i)))
+                    print (message)
+        sys.exit(1)
+
+if __name__ == '__main__':
+    main()
+
+