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# ----------------------------------------------------------------------------
# Copyright (c) 2013--, scikit-bio development team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file LICENSE.txt, distributed with this software.
# ----------------------------------------------------------------------------
import sys
import unittest
try:
import matplotlib
except ImportError:
has_matplotlib = False
else:
has_matplotlib = True
from skbio.util._plotting import PlottableMixin
@unittest.skipUnless(has_matplotlib, "Matplotlib not available.")
class TestPlottableMixin(unittest.TestCase):
def setUp(self):
def _plot(self):
fig, ax = self.plt.subplots()
ax.plot(1, 1, color='k', marker='o')
return fig
PlottableMixin.plot = _plot
def test_get_mpl_plt(self):
obj = PlottableMixin()
# hasn't imported yet
self.assertFalse(hasattr(obj, 'mpl'))
# import Matplotlib if available
obj._get_mpl_plt()
self.assertEqual(obj.mpl.__name__, 'matplotlib')
self.assertEqual(obj.plt.__name__, 'matplotlib.pyplot')
# make Matplotlib unimportable
delattr(obj, 'mpl')
backup = sys.modules['matplotlib']
sys.modules['matplotlib'] = None
with self.assertRaises(ImportError):
obj._get_mpl_plt()
# won't try again if already failed
sys.modules['matplotlib'] = backup
self.assertIsNone(obj.mpl)
with self.assertRaises(ImportError):
obj._get_mpl_plt()
def test_figure_data(self):
obj = PlottableMixin()
obj._get_mpl_plt()
# PNG data are bytes
obs = obj._figure_data('png')
self.assertIsInstance(obs, bytes)
self.assertTrue(len(obs) > 0)
# SVG data are string
obs = obj._figure_data('svg')
self.assertIsInstance(obs, str)
self.assertTrue(len(obs) > 0)
# plotting backend not available
delattr(obj, 'mpl')
backup = sys.modules['matplotlib']
sys.modules['matplotlib'] = None
self.assertIsNone(obj._figure_data())
sys.modules['matplotlib'] = backup
def test_repr_png(self):
obj = PlottableMixin()
obj._get_mpl_plt()
obs = obj._repr_png_()
self.assertIsInstance(obs, bytes)
self.assertTrue(len(obs) > 0)
def test_repr_svg(self):
obj = PlottableMixin()
obj._get_mpl_plt()
obs = obj._repr_svg_()
self.assertIsInstance(obs, str)
self.assertTrue(len(obs) > 0)
def test_png(self):
obj = PlottableMixin()
obj._get_mpl_plt()
obs = obj.png
self.assertIsInstance(obs, bytes)
self.assertTrue(len(obs) > 0)
def test_svg(self):
obj = PlottableMixin()
obj._get_mpl_plt()
obs = obj.svg
self.assertIsInstance(obs, str)
self.assertTrue(len(obs) > 0)
if __name__ == '__main__':
unittest.main()
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