Unidata/MetPy

# Copyright (c) 2016 MetPy Developers.
# Distributed under the terms of the BSD 3-Clause License.
# SPDX-License-Identifier: BSD-3-Clause
"""Tests for the `_mpl` module."""

from tempfile import TemporaryFile

import matplotlib.patheffects as mpatheffects
import numpy as np

# Needed to trigger scattertext monkey-patching
import metpy.plots  # noqa: F401, I202
from metpy.testing import autoclose_figure


# Avoiding an image-based test here since that would involve text, which can be tricky
# to handle robustly
def test_scattertext_patheffect_empty():
    """Test scattertext with empty strings and PathEffects (Issue #245)."""
    strings = ['abc', '', 'def']
    x, y = np.arange(6).reshape(2, 3)
    with autoclose_figure() as fig:
        ax = fig.add_subplot(1, 1, 1)
        ax.scattertext(x, y, strings, color='white',
                       path_effects=[mpatheffects.withStroke(linewidth=1, foreground='black')])

        # Need to trigger a render
        with TemporaryFile('wb') as fobj:
            fig.savefig(fobj)