add a test to test the whole command tool

tests/test_simplerun.py

@@ -0,0 +1,21 @@
+# MIT licensed
+# Copyright (c) 2022 lilydjwg <lilydjwg@gmail.com>, et al.
+
+import sys
+import tempfile
+import subprocess
+
+def test_simple_run():
+  '''make sure the tool as a whole can run the simplest check'''
+  with tempfile.NamedTemporaryFile(mode='w') as f:
+    f.write('''\
+[t]
+source = "cmd"
+cmd = "echo 1"
+''')
+    f.flush()
+    subprocess.check_call([
+      sys.executable, '-m', 'nvchecker',
+      '-c', f.name,
+    ])
+