test utils: add failfast option to our testrunner.py

When iterating on a test, I like using the -f|--failfast option of the
unittest module.  This patch adds the option to pass it to our
testrunner.

Here's one way to use it (with the babeltrace build dir as the current working
directory):

    tests/utils/test_python_bt2_env python3 /home/smarchi/src/babeltrace/tests/utils/python/testrunner.py /home/smarchi/src/babeltrace/tests/bindings/python/bt2/ -f

Note that this is not absolutely essential, it is also possible to call
unittest directly:

    tests/utils/test_python_bt2_env python3 -m unittest discover -s /home/smarchi/src/babeltrace/tests/bindings/python/bt2/ -f

However, I prefer using the same runner as what the testsuite uses.

To facilitate the handling of optional arguments, I made the script use
argparse.

Change-Id: Ia4c082dc0952cc8649491b2410ab2d99f1477c1b
Signed-off-by: Simon Marchi <simon.marchi@efficios.com>
Reviewed-on: https://review.lttng.org/c/babeltrace/+/1528
Tested-by: jenkins <jenkins@lttng.org>
Reviewed-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Reviewed-by: Philippe Proulx <eeppeliteloop@gmail.com>

diff --git a/tests/utils/python/testrunner.py b/tests/utils/python/testrunner.py
index 175c8fd188c8ba2b43dde2412fe21f7c3ae8712d..6a3dbabafde3e00c5ae31af28ae4de731efa7bd8 100644 (file)
--- a/tests/utils/python/testrunner.py
+++ b/tests/utils/python/testrunner.py
@@ -23,18 +23,33 @@
 from tap import TAPTestRunner
 import unittest
 import sys
+import argparse
 
 
 if __name__ == '__main__':
+    argparser = argparse.ArgumentParser()
+    argparser.add_argument('-f', '--failfast',
+                           help='Stop on first fail or error',
+                           action='store_true')
+    argparser.add_argument('start_dir',
+                           help='Base directory where to search for tests',
+                           type=str)
+    argparser.add_argument('pattern',
+                           help='Glob-style pattern of tests to run',
+                           type=str,
+                           nargs='?',
+                           default='test*.py')
+
+    args = argparser.parse_args()
+
     loader = unittest.TestLoader()
 
-    if len(sys.argv) >= 3:
-        pattern = sys.argv[2]
-    else:
-        pattern = 'test*.py'
+    start_dir = args.start_dir
+    pattern = args.pattern
+    failfast = args.failfast
 
-    tests = loader.discover(sys.argv[1], pattern)
-    runner = TAPTestRunner()
+    tests = loader.discover(start_dir, pattern)
+    runner = TAPTestRunner(failfast=failfast)
     runner.set_stream(True)
     runner.set_format('{method_name}')
     sys.exit(0 if runner.run(tests).wasSuccessful() else 1)