"""Tests for the `lalib.fields.rational.RationalField` only."""
import fractions
import pytest
from lalib import fields
# None of the test cases below contributes towards higher coverage
pytestmark = pytest.mark.overlapping_test
Q = fields.Q
class TestCastAndValidateFieldElements:
"""Test specifics for `Q.cast()` and `Q.validate()`."""
@pytest.mark.parametrize(
"value",
["1", "0", "1/1", "0/1", "+42", "-42", "+42/1", "-42/1"],
)
def test_str_is_field_element(self, value):
"""`fractions.Fraction()` also accepts `str`ings.
Source: https://docs.python.org/3/library/fractions.html#fractions.Fraction
"""
left = Q.cast(value)
right = fractions.Fraction(value)
assert left == right
assert Q.validate(value)
