WIP

tests/integration/test_schema_reader.py

@@ -4,6 +4,7 @@
 """
 from contextlib import closing
 from dataclasses import dataclass
+from io import StringIO
 from karapace.config import set_config_defaults
 from karapace.constants import DEFAULT_SCHEMA_TOPIC
 from karapace.coordinator.master_coordinator import MasterCoordinator
@@ -21,6 +22,7 @@
 from typing import List, Tuple
 
 import asyncio
+import contextlib
 import pytest
 
 
@@ -287,3 +289,42 @@ async def test_key_format_detection(
         assert key_formatter.get_keymode() == testcase.expected
     finally:
         await master_coordinator.close()
+
+#todo: run process of `KafkaSchemaReader` in background and collect logs to assert that
+# it started without any exception raised (or status code in error)
+async def test_schema_topic_creation_is_needed(
+    kafka_servers: KafkaServers,
+) -> None:
+    """Test that the schema registry can start successfully if the cluster needs create the schema registry from zero."""
+    test_name = "test_regression_soft_delete_schemas_should_be_registered"
+    topic_name = new_random_name("topic")
+    group_id = create_group_name_factory(test_name)()
+
+    config = set_config_defaults(
+        {
+            "bootstrap_uri": kafka_servers.bootstrap_servers,
+            "admin_metadata_max_age": 2,
+            "group_id": group_id,
+            "topic_name": topic_name,
+        }
+    )
+    master_coordinator = MasterCoordinator(config=config)
+
+    try:
+        await master_coordinator.start()
+        database = InMemoryDatabase()
+        offset_watcher = OffsetWatcher()
+
+        schema_reader = KafkaSchemaReader(
+            config=config,
+            offset_watcher=offset_watcher,
+            key_formatter=KeyFormatter(),
+            master_coordinator=master_coordinator,
+            database=database,
+        )
+        schema_reader.start()
+
+        with closing(schema_reader):
+            await _wait_until_reader_is_ready_and_master(master_coordinator, schema_reader)
+    finally:
+        await master_coordinator.close()