106 lines
3.8 KiB
Python
106 lines
3.8 KiB
Python
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import pytest
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from numpy.testing import assert_allclose, assert_array_equal
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from matplotlib.sankey import Sankey
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from matplotlib.testing.decorators import check_figures_equal
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def test_sankey():
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# lets just create a sankey instance and check the code runs
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sankey = Sankey()
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sankey.add()
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def test_label():
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s = Sankey(flows=[0.25], labels=['First'], orientations=[-1])
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assert s.diagrams[0].texts[0].get_text() == 'First\n0.25'
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def test_format_using_callable():
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# test using callable by slightly incrementing above label example
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def show_three_decimal_places(value):
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return f'{value:.3f}'
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s = Sankey(flows=[0.25], labels=['First'], orientations=[-1],
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format=show_three_decimal_places)
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assert s.diagrams[0].texts[0].get_text() == 'First\n0.250'
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@pytest.mark.parametrize('kwargs, msg', (
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({'gap': -1}, "'gap' is negative"),
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({'gap': 1, 'radius': 2}, "'radius' is greater than 'gap'"),
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({'head_angle': -1}, "'head_angle' is negative"),
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({'tolerance': -1}, "'tolerance' is negative"),
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({'flows': [1, -1], 'orientations': [-1, 0, 1]},
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r"The shapes of 'flows' \(2,\) and 'orientations'"),
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({'flows': [1, -1], 'labels': ['a', 'b', 'c']},
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r"The shapes of 'flows' \(2,\) and 'labels'"),
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))
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def test_sankey_errors(kwargs, msg):
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with pytest.raises(ValueError, match=msg):
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Sankey(**kwargs)
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@pytest.mark.parametrize('kwargs, msg', (
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({'trunklength': -1}, "'trunklength' is negative"),
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({'flows': [0.2, 0.3], 'prior': 0}, "The scaled sum of the connected"),
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({'prior': -1}, "The index of the prior diagram is negative"),
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({'prior': 1}, "The index of the prior diagram is 1"),
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({'connect': (-1, 1), 'prior': 0}, "At least one of the connection"),
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({'connect': (2, 1), 'prior': 0}, "The connection index to the source"),
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({'connect': (1, 3), 'prior': 0}, "The connection index to this dia"),
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({'connect': (1, 1), 'prior': 0, 'flows': [-0.2, 0.2],
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'orientations': [2]}, "The value of orientations"),
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({'connect': (1, 1), 'prior': 0, 'flows': [-0.2, 0.2],
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'pathlengths': [2]}, "The lengths of 'flows'"),
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))
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def test_sankey_add_errors(kwargs, msg):
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sankey = Sankey()
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with pytest.raises(ValueError, match=msg):
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sankey.add(flows=[0.2, -0.2])
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sankey.add(**kwargs)
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def test_sankey2():
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s = Sankey(flows=[0.25, -0.25, 0.5, -0.5], labels=['Foo'],
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orientations=[-1], unit='Bar')
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sf = s.finish()
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assert_array_equal(sf[0].flows, [0.25, -0.25, 0.5, -0.5])
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assert sf[0].angles == [1, 3, 1, 3]
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assert all([text.get_text()[0:3] == 'Foo' for text in sf[0].texts])
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assert all([text.get_text()[-3:] == 'Bar' for text in sf[0].texts])
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assert sf[0].text.get_text() == ''
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assert_allclose(sf[0].tips,
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[(-1.375, -0.52011255),
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(1.375, -0.75506044),
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(-0.75, -0.41522509),
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(0.75, -0.8599479)])
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s = Sankey(flows=[0.25, -0.25, 0, 0.5, -0.5], labels=['Foo'],
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orientations=[-1], unit='Bar')
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sf = s.finish()
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assert_array_equal(sf[0].flows, [0.25, -0.25, 0, 0.5, -0.5])
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assert sf[0].angles == [1, 3, None, 1, 3]
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assert_allclose(sf[0].tips,
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[(-1.375, -0.52011255),
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(1.375, -0.75506044),
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(0, 0),
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(-0.75, -0.41522509),
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(0.75, -0.8599479)])
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@check_figures_equal(extensions=['png'])
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def test_sankey3(fig_test, fig_ref):
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ax_test = fig_test.gca()
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s_test = Sankey(ax=ax_test, flows=[0.25, -0.25, -0.25, 0.25, 0.5, -0.5],
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orientations=[1, -1, 1, -1, 0, 0])
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s_test.finish()
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ax_ref = fig_ref.gca()
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s_ref = Sankey(ax=ax_ref)
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s_ref.add(flows=[0.25, -0.25, -0.25, 0.25, 0.5, -0.5],
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orientations=[1, -1, 1, -1, 0, 0])
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s_ref.finish()
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