fastmcp/tests/deprecated/test_mount_separators.py
2025-06-18 11:28:24 -04:00

113 lines
4.5 KiB
Python

"""Tests for the deprecated separator parameters in mount() and import_server() methods."""
import pytest
from mcp import McpError
from fastmcp import Client, FastMCP
# reset deprecation warnings for this module
pytestmark = pytest.mark.filterwarnings("default::DeprecationWarning")
def test_mount_resource_separator_deprecation_warning():
"""Test that using resource_separator in mount() raises a deprecation warning."""
main_app = FastMCP("MainApp")
sub_app = FastMCP("SubApp")
with pytest.warns(DeprecationWarning) as warnings:
main_app.mount("sub", sub_app, resource_separator="+") # type: ignore[arg-type]
# Check that we get both the argument order warning and the resource_separator warning
warning_messages = [str(w.message) for w in warnings]
assert any(
"resource_separator parameter is deprecated and ignored" in msg
for msg in warning_messages
)
assert any("Mount prefixes are now optional" in msg for msg in warning_messages)
async def test_mount_tool_separator_deprecation_warning():
"""Test that using tool_separator in mount() raises a deprecation warning."""
main_app = FastMCP("MainApp")
sub_app = FastMCP("SubApp")
with pytest.warns(DeprecationWarning) as warnings:
main_app.mount("sub", sub_app, tool_separator="-") # type: ignore[arg-type]
# Check that we get both the argument order warning and the tool_separator warning
warning_messages = [str(w.message) for w in warnings]
assert any(
"tool_separator parameter is deprecated" in msg for msg in warning_messages
)
assert any("Mount prefixes are now optional" in msg for msg in warning_messages)
# Verify the separator is ignored and the default is used
@sub_app.tool
def test_tool():
return "test"
async with Client(main_app) as client:
assert "sub_test_tool" in {t.name for t in await client.list_tools()}
assert "sub-test_tool" not in {t.name for t in await client.list_tools()}
async def test_mount_prompt_separator_deprecation_warning():
"""Test that using prompt_separator in mount() raises a deprecation warning."""
main_app = FastMCP("MainApp")
sub_app = FastMCP("SubApp")
with pytest.warns(DeprecationWarning) as warnings:
main_app.mount("sub", sub_app, prompt_separator="-") # type: ignore[arg-type]
# Check that we get both the argument order warning and the prompt_separator warning
warning_messages = [str(w.message) for w in warnings]
assert any(
"prompt_separator parameter is deprecated" in msg for msg in warning_messages
)
assert any("Mount prefixes are now optional" in msg for msg in warning_messages)
# Verify the separator is ignored and the default is used
@sub_app.prompt
def test_prompt():
return "test"
async with Client(main_app) as client:
assert await client.get_prompt("sub_test_prompt")
with pytest.raises(McpError, match="Unknown prompt"):
await client.get_prompt("sub-test_prompt")
async def test_import_server_separator_deprecation_warnings():
"""Test that using separators in import_server() raises deprecation warnings."""
main_app = FastMCP("MainApp")
sub_app = FastMCP("SubApp")
with pytest.warns(DeprecationWarning) as warnings:
await main_app.import_server("sub", sub_app, tool_separator="-") # type: ignore[arg-type]
# Check that we get both warnings
warning_messages = [str(w.message) for w in warnings]
assert any(
"tool_separator parameter is deprecated" in msg for msg in warning_messages
)
assert any("Import prefixes are now optional" in msg for msg in warning_messages)
main_app = FastMCP("MainApp")
with pytest.warns(DeprecationWarning) as warnings:
await main_app.import_server("sub", sub_app, resource_separator="+") # type: ignore[arg-type]
warning_messages = [str(w.message) for w in warnings]
assert any(
"resource_separator parameter is deprecated" in msg for msg in warning_messages
)
assert any("Import prefixes are now optional" in msg for msg in warning_messages)
main_app = FastMCP("MainApp")
with pytest.warns(DeprecationWarning) as warnings:
await main_app.import_server("sub", sub_app, prompt_separator="-") # type: ignore[arg-type]
warning_messages = [str(w.message) for w in warnings]
assert any(
"prompt_separator parameter is deprecated" in msg for msg in warning_messages
)
assert any("Import prefixes are now optional" in msg for msg in warning_messages)