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76 lines
2.4 KiB
Python
76 lines
2.4 KiB
Python
"""Tests for deprecated Tool.from_function() method.
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The Tool.from_function() method was deprecated in version 2.6.2 in favor of
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FunctionTool.from_function().
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"""
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import warnings
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import pytest
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from fastmcp.tools.tool import FunctionTool, Tool
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def test_tool_from_function_deprecation_warning():
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"""Test that Tool.from_function() raises a deprecation warning."""
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def example_function(x: int) -> str:
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"""Example function for testing."""
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return f"Result: {x}"
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with pytest.warns(
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UserWarning,
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match="Tool.from_function\\(\\) is deprecated. Use FunctionTool.from_function\\(\\) instead.",
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):
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tool = Tool.from_function(example_function)
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# Verify the tool was created correctly despite the warning
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assert isinstance(tool, FunctionTool)
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assert tool.name == "example_function"
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assert tool.description == "Example function for testing."
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def test_tool_from_function_produces_same_result_as_function_tool():
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"""Test that Tool.from_function() produces the same result as FunctionTool.from_function()."""
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def example_function(x: int, y: str = "default") -> dict:
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"""Example function with parameters."""
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return {"x": x, "y": y}
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# Create tool using the deprecated method (with warning suppressed)
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with warnings.catch_warnings():
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warnings.simplefilter("ignore")
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deprecated_tool = Tool.from_function(example_function)
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# Create tool using the new method
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new_tool = FunctionTool.from_function(example_function)
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# They should be equivalent
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assert deprecated_tool == new_tool
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assert deprecated_tool.name == new_tool.name
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assert deprecated_tool.description == new_tool.description
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assert deprecated_tool.parameters == new_tool.parameters
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def test_tool_from_function_with_overrides():
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"""Test that Tool.from_function() works with parameter overrides."""
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def example_function() -> str:
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"""Original description."""
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return "test"
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custom_name = "custom_tool_name"
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custom_description = "Custom description"
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custom_tags = {"test", "deprecated"}
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with pytest.warns(UserWarning, match="Tool.from_function\\(\\) is deprecated"):
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tool = Tool.from_function(
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example_function,
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name=custom_name,
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description=custom_description,
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tags=custom_tags,
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)
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assert tool.name == custom_name
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assert tool.description == custom_description
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assert tool.tags == custom_tags
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