python-pytest-forked: add test script

Add a CI test.sh exercising basic package functionality.

Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>

lang/python/python-pytest-forked/test.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+[ "$1" = python3-pytest-forked ] || exit 0
+
+# The plugin must register its --forked option with the installed pytest,
+# which proves both the plugin and its pytest dependency import cleanly.
+if ! python3 -m pytest --help 2>&1 | grep -- "--forked"; then
+	echo "FAIL: pytest-forked did not register the --forked option"
+	exit 1
+fi