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96 lines
2.8 KiB
Python
96 lines
2.8 KiB
Python
"""Test the functionality of loading from langchain-hub."""
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import json
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import re
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from pathlib import Path
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from typing import Iterable
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from unittest.mock import Mock
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from urllib.parse import urljoin
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import pytest
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import responses
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from langchain.utilities.loading import DEFAULT_REF, URL_BASE, try_load_from_hub
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@pytest.fixture(autouse=True)
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def mocked_responses() -> Iterable[responses.RequestsMock]:
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"""Fixture mocking requests.get."""
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with responses.RequestsMock() as rsps:
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yield rsps
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def test_non_hub_path() -> None:
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"""Test that a non-hub path returns None."""
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path = "chains/some_path"
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loader = Mock()
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valid_suffixes = {"suffix"}
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result = try_load_from_hub(path, loader, "chains", valid_suffixes)
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assert result is None
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loader.assert_not_called()
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def test_invalid_prefix() -> None:
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"""Test that a hub path with an invalid prefix returns None."""
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path = "lc://agents/some_path"
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loader = Mock()
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valid_suffixes = {"suffix"}
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result = try_load_from_hub(path, loader, "chains", valid_suffixes)
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assert result is None
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loader.assert_not_called()
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def test_invalid_suffix() -> None:
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"""Test that a hub path with an invalid suffix raises an error."""
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path = "lc://chains/path.invalid"
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loader = Mock()
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valid_suffixes = {"json"}
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with pytest.raises(ValueError, match="Unsupported file type."):
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try_load_from_hub(path, loader, "chains", valid_suffixes)
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loader.assert_not_called()
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@pytest.mark.parametrize("ref", [None, "v0.3"])
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def test_success(mocked_responses: responses.RequestsMock, ref: str) -> None:
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"""Test that a valid hub path is loaded correctly with and without a ref."""
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path = "chains/path/chain.json"
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lc_path_prefix = f"lc{('@' + ref) if ref else ''}://"
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valid_suffixes = {"json"}
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body = json.dumps({"foo": "bar"})
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ref = ref or DEFAULT_REF
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file_contents = None
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def loader(file_path: str) -> None:
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nonlocal file_contents
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assert file_contents is None
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file_contents = Path(file_path).read_text()
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mocked_responses.get( # type: ignore
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urljoin(URL_BASE.format(ref=ref), path),
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body=body,
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status=200,
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content_type="application/json",
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)
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try_load_from_hub(f"{lc_path_prefix}{path}", loader, "chains", valid_suffixes)
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assert file_contents == body
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def test_failed_request(mocked_responses: responses.RequestsMock) -> None:
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"""Test that a failed request raises an error."""
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path = "chains/path/chain.json"
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loader = Mock()
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mocked_responses.get( # type: ignore
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urljoin(URL_BASE.format(ref=DEFAULT_REF), path), status=500
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)
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with pytest.raises(ValueError, match=re.compile("Could not find file at .*")):
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try_load_from_hub(f"lc://{path}", loader, "chains", {"json"})
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loader.assert_not_called()
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