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# Copyright (c) DataLab Platform Developers, BSD 3-Clause license, see LICENSE file.
"""
Unit tests for :py:mod:`sigima.tools.coordinates`.
This module verifies the correctness of coordinate conversion functions.
"""
import numpy as np
import pytest
from sigima.tests.helpers import check_array_result
from sigima.tools.coordinates import polar_to_complex
polar_to_complex_parameters = [
(
np.array([1.0, 2.0, 3.0]),
np.array([0.0, 90.0, 180.0]),
"°",
np.array([1 + 0j, 0 + 2j, -3 + 0j]),
),
(
np.array([1.0, 2.0, 3.0]),
np.array([0.0, np.pi / 2, np.pi]),
"rad",
np.array([1 + 0j, 0 + 2j, -3 + 0j]),
),
]
@pytest.mark.parametrize("r, theta, unit, expected", polar_to_complex_parameters)
def test_polar_to_complex(r, theta, unit, expected):
"""Test :py:func:`sigima.tools.polar_to_complex` with valid input.
Args:
r: The radial coordinates.
theta: The angular coordinates.
unit: The unit of the angular coordinates ("°" or "rad").
expected: The expected complex coordinates.
"""
z = polar_to_complex(r, theta, unit=unit)
check_array_result(f"polar_to_complex_{unit}", z, expected)
def test_polar_to_complex_invalid_unit():
"""Test :py:func:`sigima.tools.polar_to_complex` with invalid unit.
Ensure :py:func:`sigima.tools.polar_to_complex` raises ValueError for unsupported
unit.
"""
r = np.array([1.0])
theta = np.array([0.0])
with pytest.raises(ValueError):
polar_to_complex(r, theta, unit="foo")
if __name__ == "__main__":
for parameters in polar_to_complex_parameters:
test_polar_to_complex(*parameters)
test_polar_to_complex_invalid_unit()
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