stages/test: add unit tests for the dnf4.versionlock stage

stages/test/test_dnf4_versionlock.py

@@ -0,0 +1,51 @@
+#!/usr/bin/python3
+import os
+
+import pytest
+
+from osbuild import testutil
+
+STAGE_NAME = "org.osbuild.dnf4.versionlock"
+
+
+@pytest.mark.parametrize("test_data,expected_err", [
+    # bad
+    ({}, "'add' is a required property"),
+    # good
+    ({"add": ["shim-x64-*"]}, ""),
+    ({"add": ["proto-1:1.1", "deftero-0:2.2", "trito-3:3.3-3.fc33"]}, ""),
+])
+def test_schema_validation_dnf4_versionlock(stage_schema, test_data, expected_err):
+    test_input = {
+        "type": STAGE_NAME,
+        "options": test_data
+    }
+    res = stage_schema.validate(test_input)
+
+    if expected_err == "":
+        assert res.valid is True, f"err: {[e.as_dict() for e in res.errors]}"
+    else:
+        assert res.valid is False
+        testutil.assert_jsonschema_error_contains(res, expected_err, expected_num_errs=1)
+
+
+@pytest.mark.parametrize("test_data", [
+    ({"add": ["shim-x64-*"]}),
+    ({"add": ["proto-1:1.1", "deftero-0:2.2", "trito-3:3.3-3.fc33"]}),
+])
+def test_locklist_dnf4_versionlock(tmp_path, stage_module, test_data):
+    plugins_dir = os.path.join(tmp_path, "etc/dnf/plugins/")
+    locklist_path = os.path.join(plugins_dir, "versionlock.list")
+    os.makedirs(plugins_dir)
+    stage_module.main(tmp_path, test_data)
+
+    with open(locklist_path, mode="r", encoding="utf-8") as locklist_fp:
+        locklist_data = locklist_fp.readlines()
+
+    for idx, package in enumerate(test_data["add"]):
+        assert locklist_data[idx * 3] == "\n"
+
+        # let's ignore the timestamp, just check that the comment was written
+        assert locklist_data[idx * 3 + 1].startswith("# Added lock on")
+
+        assert locklist_data[idx * 3 + 2] == package + "\n"