Files
2026-07-13 11:58:32 +08:00

32 lines
982 B
Python

"""Test formatting functionality."""
import pytest
from langchain_core.utils import formatter
def test_valid_formatting() -> None:
"""Test formatting works as expected."""
template = "This is a {foo} test."
output = formatter.format(template, foo="good")
expected_output = "This is a good test."
assert output == expected_output
def test_does_not_allow_args() -> None:
"""Test formatting raises error when args are provided."""
template = "This is a {} test."
with pytest.raises(
ValueError,
match="No arguments should be provided, "
"everything should be passed as keyword arguments",
):
formatter.format(template, "good")
def test_allows_extra_kwargs() -> None:
"""Test formatting allows extra keyword arguments."""
template = "This is a {foo} test."
output = formatter.format(template, foo="good", bar="oops")
expected_output = "This is a good test."
assert output == expected_output