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31 lines
739 B
Python
31 lines
739 B
Python
"""Test how pages are drawn."""
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import pytest
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from ..testing_utils import assert_no_logs
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@assert_no_logs
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@pytest.mark.parametrize('rule, pixels', (
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('2n', '_R_R_R_R_R'),
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('even', '_R_R_R_R_R'),
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('2n+1', 'R_R_R_R_R_'),
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('odd', 'R_R_R_R_R_'),
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('2n+3', '__R_R_R_R_'),
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('n', 'RRRRRRRRRR'),
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('n-1', 'RRRRRRRRRR'),
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('-n+3', 'RRR_______'),
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('-2n+3', 'R_R_______'),
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('-n-3', '__________'),
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('3', '__R_______'),
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('0n+0', '__________'),
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))
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def test_nth_page(assert_pixels, rule, pixels):
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assert_pixels('\n'.join(pixels), '''
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<style>
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@page { size: 1px 1px }
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@page:nth(%s) { background: red }
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p { break-after: page }
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</style>
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''' % rule + 10 * '<p></p>')
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