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373 lines
14 KiB
Python
373 lines
14 KiB
Python
# SPDX-FileCopyrightText: 2022-present deepset GmbH <info@deepset.ai>
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#
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# SPDX-License-Identifier: Apache-2.0
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from collections.abc import Callable
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from typing import Annotated, Literal
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import pytest
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from haystack.components.agents.state import State
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from haystack.tools.errors import SchemaGenerationError
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from haystack.tools.from_function import _remove_title_from_schema, create_tool_from_function, tool
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from haystack.tools.tool import Tool
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def function_with_docstring(city: str) -> str:
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"""Get weather report for a city."""
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return f"Weather report for {city}: 20°C, sunny"
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def test_from_function_description_from_docstring():
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tool = create_tool_from_function(function=function_with_docstring)
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assert tool.name == "function_with_docstring"
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assert tool.description == "Get weather report for a city."
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assert tool.parameters == {"type": "object", "properties": {"city": {"type": "string"}}, "required": ["city"]}
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assert tool.function == function_with_docstring
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def test_from_function_with_empty_description():
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tool = create_tool_from_function(function=function_with_docstring, description="")
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assert tool.name == "function_with_docstring"
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assert tool.description == ""
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assert tool.parameters == {"type": "object", "properties": {"city": {"type": "string"}}, "required": ["city"]}
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assert tool.function == function_with_docstring
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def test_from_function_with_custom_description():
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tool = create_tool_from_function(function=function_with_docstring, description="custom description")
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assert tool.name == "function_with_docstring"
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assert tool.description == "custom description"
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assert tool.parameters == {"type": "object", "properties": {"city": {"type": "string"}}, "required": ["city"]}
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assert tool.function == function_with_docstring
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def test_from_function_with_custom_name():
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tool = create_tool_from_function(function=function_with_docstring, name="custom_name")
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assert tool.name == "custom_name"
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assert tool.description == "Get weather report for a city."
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assert tool.parameters == {"type": "object", "properties": {"city": {"type": "string"}}, "required": ["city"]}
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assert tool.function == function_with_docstring
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def test_from_function_annotated():
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def function_with_annotations(
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city: Annotated[str, "the city for which to get the weather"] = "Munich",
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unit: Annotated[Literal["Celsius", "Fahrenheit"], "the unit for the temperature"] = "Celsius",
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nullable_param: Annotated[str | None, "a nullable parameter"] = None,
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) -> str:
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"""A simple function to get the current weather for a location."""
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return f"Weather report for {city}: 20 {unit}, sunny"
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tool = create_tool_from_function(function=function_with_annotations)
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assert tool.name == "function_with_annotations"
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assert tool.description == "A simple function to get the current weather for a location."
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assert tool.parameters == {
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"type": "object",
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"properties": {
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"city": {"type": "string", "description": "the city for which to get the weather", "default": "Munich"},
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"unit": {
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"type": "string",
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"enum": ["Celsius", "Fahrenheit"],
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"description": "the unit for the temperature",
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"default": "Celsius",
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},
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"nullable_param": {
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"anyOf": [{"type": "string"}, {"type": "null"}],
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"description": "a nullable parameter",
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"default": None,
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},
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},
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}
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def test_from_function_missing_type_hint():
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def function_missing_type_hint(city) -> str: # type: ignore[no-untyped-def]
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return f"Weather report for {city}: 20°C, sunny"
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with pytest.raises(ValueError):
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create_tool_from_function(function=function_missing_type_hint)
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def test_from_function_schema_generation_error():
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def function_with_invalid_type_hint(city: "invalid") -> str: # type: ignore[name-defined] # noqa: F821
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return f"Weather report for {city}: 20°C, sunny"
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with pytest.raises(SchemaGenerationError):
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create_tool_from_function(function=function_with_invalid_type_hint)
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def test_from_function_with_callable_params_skipped():
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def function_with_callback(query: str, callback: Callable[[str], None] | None = None) -> str:
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"""A function with a callable parameter."""
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return query
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tool = create_tool_from_function(function=function_with_callback)
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assert tool.name == "function_with_callback"
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param_names = list(tool.parameters.get("properties", {}).keys())
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assert "callback" not in param_names
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assert "query" in param_names
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def test_from_function_state_param_excluded_from_schema():
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def function_with_state(city: str, state: State) -> str:
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"""Get weather for a city, with access to agent state."""
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return f"Weather in {city}: sunny"
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tool = create_tool_from_function(function=function_with_state)
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assert tool.name == "function_with_state"
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param_names = list(tool.parameters.get("properties", {}).keys())
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assert "state" not in param_names
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assert "city" in param_names
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assert tool.parameters == {"type": "object", "properties": {"city": {"type": "string"}}, "required": ["city"]}
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def test_tool_decorator_state_param_excluded_from_schema():
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@tool
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def function_with_state(city: str, state: State) -> str:
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"""Get weather for a city, with access to agent state."""
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return f"Weather in {city}: sunny"
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param_names = list(function_with_state.parameters.get("properties", {}).keys())
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assert "state" not in param_names
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assert "city" in param_names
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def test_from_function_optional_state_param_excluded_from_schema():
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def function_with_optional_state(city: str, state: State | None = None) -> str:
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"""Get weather for a city, optionally using agent state."""
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return f"Weather in {city}: sunny"
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tool = create_tool_from_function(function=function_with_optional_state)
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param_names = list(tool.parameters.get("properties", {}).keys())
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assert "state" not in param_names
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assert "city" in param_names
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def test_tool_decorator():
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@tool
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def get_weather(city: str) -> str:
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"""Get weather report for a city."""
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return f"Weather report for {city}: 20°C, sunny"
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assert get_weather.name == "get_weather"
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assert get_weather.description == "Get weather report for a city."
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assert get_weather.parameters == {
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"type": "object",
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"properties": {"city": {"type": "string"}},
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"required": ["city"],
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}
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assert callable(get_weather.function)
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assert get_weather.function("Berlin") == "Weather report for Berlin: 20°C, sunny"
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# Test function for decorator deserialization
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@tool
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def weather_tool_with_decorator(city: str) -> str:
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"""Get weather report for a city."""
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return f"Weather report for {city}: 20°C, sunny"
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def test_tool_decorator_deserialization():
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serialized = weather_tool_with_decorator.to_dict()
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deserialized = Tool.from_dict(serialized)
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assert deserialized.name == "weather_tool_with_decorator"
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assert deserialized.description == "Get weather report for a city."
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assert deserialized.parameters == {
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"type": "object",
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"properties": {"city": {"type": "string"}},
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"required": ["city"],
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}
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def test_tool_decorator_with_annotated_params():
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@tool
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def get_weather(
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city: Annotated[str, "The target city"] = "Berlin",
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output_format: Annotated[Literal["short", "long"], "Output format"] = "short",
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) -> str:
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"""Get weather report for a city."""
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return f"Weather report for {city} ({output_format} format): 20°C, sunny"
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assert get_weather.name == "get_weather"
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assert get_weather.description == "Get weather report for a city."
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assert get_weather.parameters == {
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"type": "object",
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"properties": {
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"city": {"type": "string", "description": "The target city", "default": "Berlin"},
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"output_format": {
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"type": "string",
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"enum": ["short", "long"],
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"description": "Output format",
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"default": "short",
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},
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},
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}
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assert callable(get_weather.function)
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assert get_weather.function("Berlin", "short") == "Weather report for Berlin (short format): 20°C, sunny"
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def test_tool_decorator_with_parameters():
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@tool(name="fetch_weather", description="A tool to check the weather.")
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def get_weather(
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city: Annotated[str, "The target city"] = "Berlin",
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output_format: Annotated[Literal["short", "long"], "Output format"] = "short",
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) -> str:
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"""Get weather report for a city."""
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return f"Weather report for {city} ({output_format} format): 20°C, sunny"
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assert get_weather.name == "fetch_weather"
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assert get_weather.description == "A tool to check the weather."
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def test_tool_decorator_with_inputs_and_outputs():
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@tool(inputs_from_state={"output_format": "output_format"}, outputs_to_state={"output": {"source": "output"}})
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def get_weather(
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city: Annotated[str, "The target city"] = "Berlin",
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output_format: Annotated[Literal["short", "long"], "Output format"] = "short",
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) -> str:
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"""Get weather report for a city."""
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return f"Weather report for {city} ({output_format} format): 20°C, sunny"
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assert get_weather.name == "get_weather"
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assert get_weather.inputs_from_state == {"output_format": "output_format"}
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assert get_weather.outputs_to_state == {"output": {"source": "output"}}
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# Inputs should be excluded from auto-generated parameters
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assert get_weather.parameters == {
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"type": "object",
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"properties": {"city": {"type": "string", "description": "The target city", "default": "Berlin"}},
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}
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def test_remove_title_from_schema():
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complex_schema = {
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"properties": {
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"parameter1": {
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"anyOf": [{"type": "string"}, {"type": "integer"}],
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"default": "default_value",
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"title": "Parameter1",
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},
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"parameter2": {
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"default": [1, 2, 3],
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"items": {"anyOf": [{"type": "string"}, {"type": "integer"}]},
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"title": "Parameter2",
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"type": "array",
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},
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"parameter3": {
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"anyOf": [
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{"type": "string"},
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{"type": "integer"},
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{"items": {"anyOf": [{"type": "string"}, {"type": "integer"}]}, "type": "array"},
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],
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"default": 42,
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"title": "Parameter3",
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},
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"parameter4": {
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"anyOf": [{"type": "string"}, {"items": {"type": "integer"}, "type": "array"}, {"type": "object"}],
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"default": {"key": "value"},
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"title": "Parameter4",
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},
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},
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"title": "complex_function",
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"type": "object",
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}
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_remove_title_from_schema(complex_schema)
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assert complex_schema == {
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"properties": {
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"parameter1": {"anyOf": [{"type": "string"}, {"type": "integer"}], "default": "default_value"},
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"parameter2": {
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"default": [1, 2, 3],
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"items": {"anyOf": [{"type": "string"}, {"type": "integer"}]},
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"type": "array",
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},
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"parameter3": {
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"anyOf": [
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{"type": "string"},
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{"type": "integer"},
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{"items": {"anyOf": [{"type": "string"}, {"type": "integer"}]}, "type": "array"},
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],
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"default": 42,
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},
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"parameter4": {
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"anyOf": [{"type": "string"}, {"items": {"type": "integer"}, "type": "array"}, {"type": "object"}],
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"default": {"key": "value"},
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},
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},
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"type": "object",
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}
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def test_remove_title_from_schema_do_not_remove_title_property():
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"""Test that the utility function only removes the 'title' keywords and not the 'title' property (if present)."""
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schema = {
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"properties": {
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"parameter1": {"type": "string", "title": "Parameter1"},
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"title": {"type": "string", "title": "Title"},
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},
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"title": "complex_function",
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"type": "object",
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}
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_remove_title_from_schema(schema)
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assert schema == {"properties": {"parameter1": {"type": "string"}, "title": {"type": "string"}}, "type": "object"}
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def test_remove_title_from_schema_handle_no_title_in_top_level():
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schema = {
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"properties": {
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"parameter1": {"type": "string", "title": "Parameter1"},
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"parameter2": {"type": "integer", "title": "Parameter2"},
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},
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"type": "object",
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}
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_remove_title_from_schema(schema)
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assert schema == {
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"properties": {"parameter1": {"type": "string"}, "parameter2": {"type": "integer"}},
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"type": "object",
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}
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async def async_function_with_docstring(city: str) -> str:
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"""Get weather report for a city."""
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return f"Weather report for {city}: 20°C, sunny"
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class TestFromFunctionAsync:
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def test_create_tool_from_async_function(self):
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tool_obj = create_tool_from_function(async_function_with_docstring)
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assert tool_obj.function is None
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assert tool_obj.async_function is async_function_with_docstring
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assert tool_obj.name == "async_function_with_docstring"
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assert tool_obj.parameters == {
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"type": "object",
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"properties": {"city": {"type": "string"}},
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"required": ["city"],
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}
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def test_tool_decorator_on_async_function(self):
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decorated = tool(async_function_with_docstring)
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assert decorated.function is None
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assert decorated.async_function is async_function_with_docstring
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assert decorated.name == "async_function_with_docstring"
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@pytest.mark.asyncio
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async def test_invoke_async(self):
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decorated = tool(async_function_with_docstring)
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assert await decorated.invoke_async(city="Berlin") == "Weather report for Berlin: 20°C, sunny"
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