351 lines
9.1 KiB
Python
351 lines
9.1 KiB
Python
"""
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weasyprint.tests.test_draw.test_image
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-------------------------------------
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Test how images are drawn.
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:copyright: Copyright 2011-2019 Simon Sapin and contributors, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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import pytest
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from ..testing_utils import assert_no_logs, capture_logs
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from . import assert_pixels, assert_same_rendering
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centered_image = '''
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________
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________
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__rBBB__
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__BBBB__
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__BBBB__
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__BBBB__
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________
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________
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'''
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blue_image = '''
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________
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________
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__aaaa__
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__aaaa__
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__aaaa__
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__aaaa__
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________
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________
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'''
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no_image = '''
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________
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________
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________
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________
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________
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________
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________
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________
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'''
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page_break = '''
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________
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________
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__rBBB__
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__BBBB__
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__BBBB__
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__BBBB__
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________
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________
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________
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________
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________
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________
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________
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________
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________
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________
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________
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________
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__rBBB__
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__BBBB__
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__BBBB__
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__BBBB__
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________
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________
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'''
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table = '''
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________
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________
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__rBBB__
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__BBBB__
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__BBBB__
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__BBBB__
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________
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________
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__rBBB__
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__BBBB__
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__BBBB__
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__BBBB__
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________
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________
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________
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________
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'''
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@assert_no_logs
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@pytest.mark.parametrize('filename, image', (
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('pattern.svg', centered_image),
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('pattern.png', centered_image),
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('pattern.palette.png', centered_image),
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('pattern.gif', centered_image),
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('blue.jpg', blue_image)
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))
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def test_images(filename, image):
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assert_pixels('inline_image_' + filename, 8, 8, image, '''
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<style>
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@page { size: 8px }
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body { margin: 2px 0 0 2px; background: #fff; font-size: 0 }
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</style>
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<div><img src="%s"></div>''' % filename)
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@assert_no_logs
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def test_images_block():
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assert_pixels('block_image', 8, 8, centered_image, '''
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<style>
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@page { size: 8px }
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body { margin: 0; background: #fff; font-size: 0 }
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img { display: block; margin: 2px auto 0 }
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</style>
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<div><img src="pattern.png"></div>''')
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@assert_no_logs
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def test_images_not_found():
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with capture_logs() as logs:
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assert_pixels('image_not_found', 8, 8, no_image, '''
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<style>
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@page { size: 8px }
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body { margin: 0; background: #fff; font-size: 0 }
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img { display: block; margin: 2px auto 0 }
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</style>
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<div><img src="inexistent1.png" alt=""></div>''')
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assert len(logs) == 1
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assert 'ERROR: Failed to load image' in logs[0]
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assert 'inexistent1.png' in logs[0]
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@assert_no_logs
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def test_images_no_src():
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assert_pixels('image_no_src', 8, 8, no_image, '''
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<style>
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@page { size: 8px }
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body { margin: 0; background: #fff; font-size: 0 }
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img { display: block; margin: 2px auto 0 }
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</style>
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<div><img alt=""></div>''')
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@assert_no_logs
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def test_images_alt():
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with capture_logs() as logs:
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assert_same_rendering(200, 30, [
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(name, '''
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<style>
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@page { size: 200px 30px }
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body { margin: 0; background: #fff; font-size: 0 }
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</style>
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<div>%s</div>''' % html)
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for name, html in [
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('image_alt_text_reference', 'Hello, world!'),
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('image_alt_text_not_found',
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'<img src="inexistent2.png" alt="Hello, world!">'),
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('image_alt_text_no_src',
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'<img alt="Hello, world!">'),
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('image_svg_no_intrinsic_size',
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'''<img src="data:image/svg+xml,<svg></svg>"
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alt="Hello, world!">'''),
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]
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])
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assert len(logs) == 1
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assert 'ERROR: Failed to load image' in logs[0]
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assert 'inexistent2.png' in logs[0]
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@assert_no_logs
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def test_images_no_width():
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assert_pixels('image_0x1', 8, 8, no_image, '''
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<style>
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@page { size: 8px }
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body { margin: 2px; background: #fff; font-size: 0 }
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</style>
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<div><img src="pattern.png" alt="not shown"
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style="width: 0; height: 1px"></div>''')
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@assert_no_logs
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def test_images_no_height():
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assert_pixels('image_1x0', 8, 8, no_image, '''
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<style>
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@page { size: 8px }
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body { margin: 2px; background: #fff; font-size: 0 }
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</style>
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<div><img src="pattern.png" alt="not shown"
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style="width: 1px; height: 0"></div>''')
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@assert_no_logs
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def test_images_no_width_height():
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assert_pixels('image_0x0', 8, 8, no_image, '''
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<style>
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@page { size: 8px }
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body { margin: 2px; background: #fff; font-size: 0 }
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</style>
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<div><img src="pattern.png" alt="not shown"
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style="width: 0; height: 0"></div>''')
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@assert_no_logs
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def test_images_page_break():
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assert_pixels('image_page_break', 8, 3 * 8, page_break, '''
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<style>
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@page { size: 8px; margin: 2px; background: #fff }
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body { font-size: 0 }
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</style>
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<div><img src="pattern.png"></div>
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<div style="page-break-before: right"><img src="pattern.png"></div>''')
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@assert_no_logs
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def test_image_repeat_inline():
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# Test regression: https://github.com/Kozea/WeasyPrint/issues/808
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assert_pixels('image_page_repeat_inline', 8, 2 * 8, table, '''
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<style>
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@page { size: 8px; margin: 0; background: #fff }
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table { border-collapse: collapse; margin: 2px }
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th, td { border: none; padding: 0 }
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th { height: 4px; line-height: 4px }
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td { height: 2px }
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img { vertical-align: top }
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</style>
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<table>
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<thead>
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<tr><th><img src="pattern.png"></th></tr>
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</thead>
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<tbody>
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<tr><td></td></tr>
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<tr><td></td></tr>
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</tbody>
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</table>''')
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@assert_no_logs
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def test_image_repeat_block():
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# Test regression: https://github.com/Kozea/WeasyPrint/issues/808
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assert_pixels('image_page_repeat_block', 8, 2 * 8, table, '''
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<style>
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@page { size: 8px; margin: 0; background: #fff }
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table { border-collapse: collapse; margin: 2px }
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th, td { border: none; padding: 0 }
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th { height: 4px }
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td { height: 2px }
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img { display: block }
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</style>
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<table>
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<thead>
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<tr><th><img src="pattern.png"></th></tr>
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</thead>
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<tbody>
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<tr><td></td></tr>
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<tr><td></td></tr>
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</tbody>
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</table>''')
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@assert_no_logs
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def test_images_padding():
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# Regression test: padding used to be ignored on images
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assert_pixels('image_with_padding', 8, 8, centered_image, '''
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<style>
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@page { size: 8px; background: #fff }
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body { font-size: 0 }
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</style>
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<div style="line-height: 1px">
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<img src=pattern.png style="padding: 2px 0 0 2px">
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</div>''')
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@assert_no_logs
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def test_images_in_inline_block():
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# Regression test: this used to cause an exception
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assert_pixels('image_in_inline_block', 8, 8, centered_image, '''
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<style>
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@page { size: 8px }
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body { margin: 2px 0 0 2px; background: #fff; font-size: 0 }
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</style>
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<div style="display: inline-block">
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<p><img src=pattern.png></p>
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</div>''')
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@assert_no_logs
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def test_images_shared_pattern():
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# The same image is used in a repeating background,
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# then in a non-repating <img>.
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# If Pattern objects are shared carelessly, the image will be repeated.
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assert_pixels('image_shared_pattern', 12, 12, '''
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____________
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____________
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__aaaaaaaa__
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__aaaaaaaa__
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____________
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__aaaa______
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__aaaa______
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__aaaa______
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__aaaa______
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____________
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____________
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____________
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''', '''
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<style>
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@page { size: 12px }
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body { margin: 2px; background: #fff; font-size: 0 }
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</style>
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<div style="background: url(blue.jpg);
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height: 2px; margin-bottom: 1px"></div>
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<img src=blue.jpg>
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''')
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def test_image_resolution():
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assert_same_rendering(20, 20, [
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('image_resolution_ref', '''
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<style>@page { size: 20px; margin: 2px; background: #fff }</style>
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<div style="font-size: 0">
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<img src="pattern.png" style="width: 8px"></div>
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'''),
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('image_resolution_img', '''
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<style>@page { size: 20px; margin: 2px; background: #fff }</style>
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<div style="image-resolution: .5dppx; font-size: 0">
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<img src="pattern.png"></div>
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'''),
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('image_resolution_content', '''
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<style>@page { size: 20px; margin: 2px; background: #fff }
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div::before { content: url(pattern.png) }
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</style>
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<div style="image-resolution: .5dppx; font-size: 0"></div>
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'''),
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('image_resolution_background', '''
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<style>@page { size: 20px; margin: 2px; background: #fff }
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</style>
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<div style="height: 16px; image-resolution: .5dppx;
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background: url(pattern.png) no-repeat"></div>
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'''),
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])
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