1 files changed, 61 insertions, 0 deletions
diff --git a/src/tests/extension_var_test.py b/src/tests/extension_var_test.py
new file mode 100644
index 0000000..af7ec84
--- /dev/null
+++ b/src/tests/extension_var_test.py
@@ -0,0 +1,61 @@
+#!/usr/bin/env python3
+
+# Copyright (C) 2020 The Nitrocli Developers
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from argparse import (
+  ArgumentParser,
+)
+from enum import (
+  Enum,
+)
+from os import (
+  environ,
+)
+from sys import (
+  argv,
+  exit,
+)
+
+
+class Action(Enum):
+  """An action to perform."""
+  BINARY = "binary"
+  MODEL = "model"
+  NO_CACHE = "no-cache"
+  SERIAL_NUMBERS = "serial-numbers"
+  USB_PATH = "usb-path"
+  VERBOSITY = "verbosity"
+
+  @classmethod
+  def all(cls):
+    """Return the list of all the enum members' values."""
+    return [x.value for x in cls.__members__.values()]
+
+
+def main(args):
+  """The extension's main function."""
+  parser = ArgumentParser()
+  parser.add_argument(choices=Action.all(), dest="what")
+  parser.add_argument("--nitrocli", action="store", default=None)
+  parser.add_argument("--model", action="store", default=None)
+  # We deliberately store the argument to this option as a string
+  # because we can differentiate between None and a valid value, in
+  # order to verify that it really is supplied.
+  parser.add_argument("--verbosity", action="store", default=None)
+
+  namespace = parser.parse_args(args[1:])
+  # We create a "reverse" mapping from string to variant (e.g., model ->
+  # MODEL).
+  options = {v.value: k for k, v in Action.__members__.items()}
+  try:
+    var = options[namespace.what]
+    print(environ[f"NITROCLI_{var}"])
+  except KeyError:
+    return 1
+
+  return 0
+
+
+if __name__ == "__main__":
+  exit(main(argv))