test_literal_validator.py

import pytest
from _plotly_utils.basevalidators import LiteralValidator
import numpy as np


# Fixtures
# --------
@pytest.fixture()
def validator():
    return LiteralValidator("prop", "parent", "scatter")


# Tests
# -----
# ### Acceptance ###
@pytest.mark.parametrize("val", ["scatter"])
def test_acceptance(val, validator):
    assert validator.validate_coerce(val) is val


# ### Test rejection ###
@pytest.mark.parametrize("val", ["hello", (), [], [1, 2, 3], set(), "34"])
def test_rejection(val, validator):
    with pytest.raises(ValueError) as validation_failure:
        validator.validate_coerce(val)

    assert "read-only" in str(validation_failure.value)