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54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
"""Test the BaseOutputParser class and its sub-classes."""
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from abc import ABC
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from typing import List, Optional, Set, Type
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import pytest
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from langchain.schema import BaseOutputParser
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def non_abstract_subclasses(
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cls: Type[ABC], to_skip: Optional[Set] = None
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) -> List[Type]:
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"""Recursively find all non-abstract subclasses of a class."""
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_to_skip = to_skip or set()
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subclasses = []
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for subclass in cls.__subclasses__():
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if not getattr(subclass, "__abstractmethods__", None):
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if subclass.__name__ not in _to_skip:
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subclasses.append(subclass)
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subclasses.extend(non_abstract_subclasses(subclass, to_skip=_to_skip))
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return subclasses
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# parsers defined not in the output_parsers module:
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_PARSERS_TO_SKIP = {
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"FakeOutputParser",
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"BaseOutputParser",
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"FinishedOutputParser",
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"RouterOutputParser",
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}
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_NON_ABSTRACT_PARSERS = non_abstract_subclasses(
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BaseOutputParser, to_skip=_PARSERS_TO_SKIP
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)
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@pytest.mark.parametrize("cls", _NON_ABSTRACT_PARSERS)
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def test_subclass_implements_type(cls: Type[BaseOutputParser]) -> None:
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try:
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cls._type
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except NotImplementedError:
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pytest.fail(f"_type property is not implemented in class {cls.__name__}")
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def test_all_subclasses_implement_unique_type() -> None:
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types = []
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for cls in _NON_ABSTRACT_PARSERS:
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try:
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types.append(cls._type)
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except NotImplementedError:
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# This is handled in the previous test
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pass
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dups = set([t for t in types if types.count(t) > 1])
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assert not dups, f"Duplicate types: {dups}"
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