Add test of schema towards its meta schema (#385)

* Add test for valid schema
* Neglect old ActC versions

test_jsonschema.py

@@ -0,0 +1,49 @@
+# Copyright 2023-2024 Ericsson AB.
+# For a full list of individual contributors, please see the commit history.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import json
+import subprocess
+
+import jsonschema
+import pytest
+
+
+@pytest.mark.parametrize(
+    "filename",
+    subprocess.check_output(["git", "ls-files", "--exclude-standard", "schemas/*.json"])
+    .decode("utf-8")
+    .splitlines(),
+)
+def test_json_schema(filename):
+    with open(filename) as input_file:
+        event_schema = json.load(input_file)
+
+    # Evaluate which schema validator to use. Use standard validator for old ActC
+    # schemas, to cope with bug https://github.com/eiffel-community/eiffel/issues/376
+    schema_validator = None
+    if ("ActivityCanceled" in filename) and (
+        event_schema["properties"]["meta"]["properties"]["version"]["default"]
+        in ["1.0.0", "1.1.0", "2.0.0", "3.0.0", "3.1.0", "3.2.0"]
+    ):
+        schema_validator = jsonschema.Draft4Validator
+    else:
+        stricter_metaschema = dict(
+            jsonschema.Draft4Validator.META_SCHEMA, additionalProperties=False
+        )
+        schema_validator = jsonschema.validators.create(
+            stricter_metaschema, jsonschema.Draft4Validator.VALIDATORS, "StrictDraft4"
+        )
+
+    schema_validator.check_schema(event_schema)