Add pdf tests

This commit is contained in:
Kara Engelhardt
2026-09-17 17:42:51 +02:00
parent 21c979b657
commit ad1c9fe2cc
7 changed files with 890 additions and 0 deletions
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# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under the License.
import tempfile
from datetime import timedelta
from decimal import Decimal
from io import BytesIO
from pathlib import Path
import pypdfium2
import pytest
from django.core.files import File
from django.utils.timezone import now
from django_scopes import scope
from PIL import ImageChops
from pypdf import PdfReader
from pretix.base.models import (
@@ -118,3 +123,49 @@ def test_generate_pdf_multi(env):
assert ftype == 'application/pdf'
pdf = PdfReader(BytesIO(buf))
assert len(pdf.pages) == 1
def test_asset(name):
return Path(__file__).parent / "assets" / name
def compare_pdfs(inp_a: Path | bytes, inp_b: Path | bytes):
pdf_a = pypdfium2.PdfDocument(inp_a)
pdf_b = pypdfium2.PdfDocument(inp_b)
assert len(pdf_a) == len(pdf_b)
for i, (expected_page, output_page) in enumerate(zip(pdf_a, pdf_b)):
expected_render = expected_page.render()
output_render = output_page.render()
assert expected_render.height == output_render.height
assert expected_render.width == output_render.width
diff = ImageChops.difference(expected_render.to_pil(), output_render.to_pil())
if diff.getbbox():
with tempfile.NamedTemporaryFile(delete=False, suffix=".png") as f:
diff.save(f)
assert not diff.getbbox(), f"Page {i} differs. Diff was written to {f.name}"
@pytest.mark.django_db
@pytest.mark.parametrize("case", [
"bg-rotated",
"bg-mediabox-offset",
"bg-cropbox"
])
def test_generate_pdf_weird_bgs(env, case):
event, order, shirt = env
asset_folder = test_asset(case)
with open(asset_folder / "bg.pdf", 'rb') as fi:
event.badge_layouts.create(name="Default", default=True, background=File(fi, name="test.pdf"))
e = BadgeExporter(event, organizer=event.organizer)
fname, ftype, buf = e.render({
'items': [shirt.pk],
'rendering': 'one',
'include_pending': True
})
assert ftype == 'application/pdf'
assert buf
compare_pdfs(buf, asset_folder / "expected.pdf")