test/rpm: add schema validation test for boot_root

stages/test/test_rpm.py

@@ -0,0 +1,28 @@
+import pytest
+
+from osbuild import testutil
+
+STAGE_NAME = "org.osbuild.rpm"
+
+
+@pytest.mark.parametrize("test_data,expected_err", [
+    # bad
+    ({"kernel_install_env": {"boot_root": "../rel"}}, "'../rel' does not match "),
+    # good
+    ({}, ""),
+    ({"kernel_install_env": {"boot_root": "/boot"}}, ""),
+])
+def test_schema_validation(stage_schema, test_data, expected_err):
+    test_input = {
+        "type": STAGE_NAME,
+        "options": {
+        }
+    }
+    test_input["options"].update(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)