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# (C) British Crown Copyright 2015 - 2017, 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)
try:
from unittest import mock
except ImportError:
import mock
import numpy as np
import matplotlib.pyplot as plt
from matplotlib.testing.decorators import cleanup
import pytest
import cartopy.crs as ccrs
# Note, other tests for quiver exist in test_mpl_integration.
class TestQuiverShapes(object):
def setup_method(self):
self.x = np.linspace(-60, 42.5, 10)
self.y = np.linspace(30, 72.5, 7)
self.x2d, self.y2d = np.meshgrid(self.x, self.y)
self.u = np.cos(np.deg2rad(self.y2d))
self.v = np.cos(2. * np.deg2rad(self.x2d))
self.rp = ccrs.RotatedPole(pole_longitude=177.5, pole_latitude=37.5)
self.pc = ccrs.PlateCarree()
self.fig = plt.figure()
self.ax = plt.axes(projection=self.pc)
@cleanup
def test_quiver_transform_xyuv_1d(self):
with mock.patch('matplotlib.axes.Axes.quiver') as patch:
self.ax.quiver(self.x2d.ravel(), self.y2d.ravel(),
self.u.ravel(), self.v.ravel(), transform=self.rp)
args, kwargs = patch.call_args
assert len(args) == 5
assert sorted(kwargs.keys()) == [u'transform']
shapes = [arg.shape for arg in args[1:]]
# Assert that all the shapes have been broadcast.
assert shapes == [(70, )] * 4
@cleanup
def test_quiver_transform_xy_1d_uv_2d(self):
with mock.patch('matplotlib.axes.Axes.quiver') as patch:
self.ax.quiver(self.x, self.y, self.u, self.v, transform=self.rp)
args, kwargs = patch.call_args
assert len(args) == 5
assert sorted(kwargs.keys()) == [u'transform']
shapes = [arg.shape for arg in args[1:]]
# Assert that all the shapes have been broadcast.
assert shapes == [(7, 10)] * 4
def test_quiver_transform_xy_2d_uv_1d(self):
with pytest.raises(ValueError):
self.ax.quiver(self.x2d, self.y2d,
self.u.ravel(), self.v.ravel(), transform=self.rp)
def test_quiver_transform_inconsistent_shape(self):
with pytest.raises(ValueError):
self.ax.quiver(self.x, self.y,
self.u.ravel(), self.v.ravel(), transform=self.rp)
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