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"""Check the famous Acid2 test."""
import io
from PIL import Image
from weasyprint import CSS, HTML
from .testing_utils import assert_no_logs, capture_logs, resource_path
@assert_no_logs
def test_acid2(assert_pixels_equal):
# Reduce image size and avoid Ghostscript rounding problems
stylesheets = (CSS(string='@page { size: 500px 800px }'),)
def render(filename):
return HTML(resource_path(filename)).render(stylesheets=stylesheets)
with capture_logs():
# This is a copy of https://www.webstandards.org/files/acid2/test.html
document = render('acid2-test.html')
intro_page, test_page = document.pages
# Ignore the intro page: it is not in the reference
test_png = document.copy([test_page]).write_png()
test_pixels = Image.open(io.BytesIO(test_png)).getdata()
# This is a copy of https://www.webstandards.org/files/acid2/reference.html
ref_png = render('acid2-reference.html').write_png()
ref_image = Image.open(io.BytesIO(ref_png))
ref_pixels = ref_image.getdata()
width, height = ref_image.size
assert_pixels_equal(width, height, test_pixels, ref_pixels, tolerance=2)
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