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# (C) British Crown Copyright 2011 - 2020, Met Office
#
# This file is part of cartopy.
#
# cartopy is free software: you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the
# Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cartopy is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with cartopy. If not, see <https://www.gnu.org/licenses/>.
from __future__ import (absolute_import, division, print_function)
import matplotlib.pyplot as plt
import pytest
from cartopy.tests.mpl import MPL_VERSION, ImageTesting
class ExampleImageTesting(ImageTesting):
"""Subclasses ImageTesting to nullify the plt.show commands."""
def __call__(self, test_func):
fn = ImageTesting.__call__(self, test_func)
def new_fn(*args, **kwargs):
try:
show = plt.show
plt.show = lambda *args, **kwargs: None
r = fn(*args, **kwargs)
finally:
plt.show = show
return r
new_fn.__name__ = fn.__name__
return new_fn
@pytest.mark.natural_earth
@ExampleImageTesting(['global_map'],
tolerance=4.5 if MPL_VERSION < '2' else 0.5)
def test_global_map():
import cartopy.examples.global_map as example
example.main()
if MPL_VERSION < '2':
contour_labels_tolerance = 7.5
elif MPL_VERSION <= '2.0.2':
contour_labels_tolerance = 1.24
elif MPL_VERSION <= '2.1.2':
contour_labels_tolerance = 0.63
else:
contour_labels_tolerance = 0
@pytest.mark.natural_earth
@ExampleImageTesting(['contour_label'], tolerance=contour_labels_tolerance)
def test_contour_label():
import cartopy.examples.contour_labels as example
example.main()
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