Add a starting point for testing the CLI

Author: mhucka

tests/test_cli.py

@@ -0,0 +1,15 @@
+from os import path
+import plac
+import sys
+
+try:
+    thisdir = path.dirname(path.abspath(__file__))
+    sys.path.append(path.join(thisdir, '..'))
+except Exception:                       # noqa: PIE786
+    sys.path.append('..')
+
+
+def test_usage_help(capsys):
+    from %PROJECT_NAME%.__main__ import main
+    with plac.Interpreter(main) as i:
+        i.check('-h', '')