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superset2/tests/unit_tests/mcp_service/test_mcp_server.py
2026-01-20 17:30:47 +01:00

127 lines
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Python

# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you 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.
"""Tests for MCP server EventStore creation."""
from unittest.mock import MagicMock, patch
def test_create_event_store_returns_none_when_no_redis_url():
"""EventStore returns None when no Redis URL configured (single-pod mode)."""
config = {"CACHE_REDIS_URL": None}
from superset.mcp_service.server import create_event_store
result = create_event_store(config)
assert result is None
def test_create_event_store_returns_none_when_empty_config():
"""EventStore returns None when config has no CACHE_REDIS_URL."""
config = {}
from superset.mcp_service.server import create_event_store
result = create_event_store(config)
assert result is None
def test_create_event_store_creates_event_store_with_redis():
"""EventStore is created with Redis backend when URL is configured."""
config = {
"CACHE_REDIS_URL": "redis://localhost:6379/0",
"event_store_max_events": 50,
"event_store_ttl": 1800,
}
mock_redis_store = MagicMock()
mock_event_store = MagicMock()
with patch(
"superset.mcp_service.server._create_redis_store",
return_value=mock_redis_store,
) as mock_create_store:
with patch(
"fastmcp.server.event_store.EventStore",
return_value=mock_event_store,
) as mock_event_store_class:
from superset.mcp_service.server import create_event_store
result = create_event_store(config)
# Verify EventStore was created
assert result is mock_event_store
# Verify _create_redis_store was called with prefix wrapper
mock_create_store.assert_called_once_with(
config, prefix="mcp_events_", wrap=True
)
# Verify EventStore was initialized with correct params
mock_event_store_class.assert_called_once_with(
storage=mock_redis_store,
max_events_per_stream=50,
ttl=1800,
)
def test_create_event_store_uses_default_config_values():
"""EventStore uses default values when not specified in config."""
config = {
"CACHE_REDIS_URL": "redis://localhost:6379/0",
}
mock_redis_store = MagicMock()
mock_event_store = MagicMock()
with patch(
"superset.mcp_service.server._create_redis_store",
return_value=mock_redis_store,
):
with patch(
"fastmcp.server.event_store.EventStore",
return_value=mock_event_store,
) as mock_event_store_class:
from superset.mcp_service.server import create_event_store
result = create_event_store(config)
assert result is mock_event_store
# Verify defaults are used
mock_event_store_class.assert_called_once_with(
storage=mock_redis_store,
max_events_per_stream=100, # default
ttl=3600, # default
)
def test_create_event_store_returns_none_when_redis_store_fails():
"""EventStore returns None when Redis store creation fails."""
config = {
"CACHE_REDIS_URL": "redis://localhost:6379/0",
}
with patch(
"superset.mcp_service.server._create_redis_store",
return_value=None, # Simulates Redis store creation failure
):
from superset.mcp_service.server import create_event_store
result = create_event_store(config)
assert result is None