test: add minimal test for expiredate for user stage

stages/test/test_users.py

@@ -0,0 +1,34 @@
+#!/usr/bin/python3
+
+from unittest.mock import patch
+
+import pytest
+
+from osbuild.testutil import make_fake_tree
+
+STAGE_NAME = "org.osbuild.users"
+
+
+@pytest.mark.parametrize("user_opts,expected_args", [
+    ({}, []),
+    ({"expiredate": 12345}, ["--expiredate", "12345"]),
+])
+@patch("subprocess.run")
+def test_users_happy(mocked_run, tmp_path, stage_module, user_opts, expected_args):
+    make_fake_tree(tmp_path, {
+        "/etc/passwd": "",
+    })
+
+    options = {
+        "users": {
+            "foo": {},
+        }
+    }
+    options["users"]["foo"].update(user_opts)
+
+    stage_module.main(tmp_path, options)
+
+    assert len(mocked_run.call_args_list) == 1
+    args, kwargs = mocked_run.call_args_list[0]
+    assert args[0] == ["chroot", tmp_path, "useradd"] + expected_args + ["foo"]
+    assert kwargs.get("check")