Adds test of the check-backup command

tests/test_check_backup.py

@@ -0,0 +1,18 @@
+# Mobile Verification Toolkit (MVT)
+# Copyright (c) 2021-2022 The MVT Project Authors.
+# Use of this software is governed by the MVT License 1.1 that can be found at
+#   https://license.mvt.re/1.1/
+
+from click.testing import CliRunner
+
+from mvt.ios.cli import check_backup
+
+from .utils import get_backup_folder
+
+
+class TestCheckBackupCommand:
+    def test_check(self):
+        runner = CliRunner()
+        path = get_backup_folder()
+        result = runner.invoke(check_backup, [path])
+        assert result.exit_code == 0