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Introduce experimental OpenAPI parser with improved performance and maintainability (#1209)

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Jeremiah Lowin 2025-07-21 16:17:36 -04:00 • committed by GitHub
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42 changed files with 8735 additions and 60 deletions
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28
tests/server/openapi/test_optional_parameters.py
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@ -5,8 +5,8 @@ import pytest
from fastmcp.utilities.openapi import HTTPRoute, ParameterInfo, _combine_schemas
async def test_optional_parameter_schema_allows_null():
"""Test that optional parameters generate schemas that allow null values."""
async def test_optional_parameter_schema_preserves_original_type():
"""Test that optional parameters preserve their original schema without forcing nullable behavior."""
# Create a minimal HTTPRoute with optional parameter
optional_param = ParameterInfo(
name="optional_param",
@ -38,13 +38,12 @@ async def test_optional_parameter_schema_allows_null():
# Generate combined schema
schema = _combine_schemas(route)
# Verify that optional parameter allows null values
# Verify that optional parameter preserves original schema
optional_param_schema = schema["properties"]["optional_param"]
# Should have anyOf with string and null types
assert "anyOf" in optional_param_schema
assert {"type": "string"} in optional_param_schema["anyOf"]
assert {"type": "null"} in optional_param_schema["anyOf"]
# Should preserve the original type without making it nullable
assert optional_param_schema["type"] == "string"
assert "anyOf" not in optional_param_schema
# Required parameter should not allow null
required_param_schema = schema["properties"]["required_param"]
@ -67,8 +66,8 @@ async def test_optional_parameter_schema_allows_null():
{"type": "object", "properties": {"name": {"type": "string"}}},
],
)
async def test_optional_parameter_allows_null_for_type(param_schema):
"""Test that optional parameters of any type allow null values."""
async def test_optional_parameter_preserves_schema_for_all_types(param_schema):
"""Test that optional parameters of any type preserve their original schema without nullable behavior."""
optional_param = ParameterInfo(
name="optional_param",
location="query",
@ -92,9 +91,10 @@ async def test_optional_parameter_allows_null_for_type(param_schema):
schema = _combine_schemas(route)
optional_param_schema = schema["properties"]["optional_param"]
# Should have anyOf with the original type and null
assert "anyOf" in optional_param_schema
assert {"type": "null"} in optional_param_schema["anyOf"]
# Should preserve the original schema exactly without making it nullable
assert "anyOf" not in optional_param_schema
# Check that original schema is fully preserved under anyOf
assert param_schema in optional_param_schema["anyOf"]
# The schema should include the original type and fields, plus the description
for key, value in param_schema.items():
assert optional_param_schema[key] == value
assert optional_param_schema.get("description") == "Optional parameter"