support/testing: add python-argh tests

Use a simple script to check the basic usage. Since this package
provides command line arguments, override run_sample_scripts to call the
script with arguments and check the expected output.

Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

support/testing/tests/package/sample_python_argh.py

@@ -0,0 +1,10 @@
+import argh
+
+
+@argh.arg("foo", help="help for foo")
+@argh.arg("--bar", help="help for bar")
+def main(foo, bar=False):
+    print("{}, {}".format(foo, bar))
+
+
+argh.dispatch_command(main)