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import gc
from contextlib import suppress
from shutil import copy
from sys import getrefcount as refcount
import pytest
from pikepdf import Pdf, PdfMatrix, Stream
# pylint: disable=redefined-outer-name,pointless-statement
@pytest.fixture
def graph(resources):
return Pdf.open(resources / 'graph.pdf')
@pytest.fixture
def fourpages(resources):
return Pdf.open(resources / 'fourpages.pdf')
@pytest.fixture
def sandwich(resources):
return Pdf.open(resources / 'sandwich.pdf')
def test_split_pdf(fourpages, outdir):
for n, page in enumerate(fourpages.pages):
outpdf = Pdf.new()
outpdf.pages.append(page)
outpdf.save(outdir / "page{}.pdf".format(n + 1))
assert len([f for f in outdir.iterdir() if f.name.startswith('page')]) == 4
def test_empty_pdf(outdir):
q = Pdf.new()
with pytest.raises(IndexError):
q.pages[0]
q.save(outdir / 'empty.pdf')
def test_delete_last_page(graph, outdir):
q = graph
del q.pages[0]
q.save(outdir / 'empty.pdf')
def test_replace_page(graph, fourpages):
q = fourpages
q2 = graph
assert len(q.pages) == 4
q.pages[1] = q2.pages[0]
assert len(q.pages) == 4
assert q.pages[1].Resources.XObject.keys() == q2.pages[0].Resources.XObject.keys()
def test_hard_replace_page(fourpages, graph, sandwich, outdir):
q = fourpages
q2 = graph
q2_page = q2.pages[0]
del q2
q.pages[1] = q2_page
q2 = sandwich
q2_page = q2.pages[0]
q.pages[2] = q2_page
del q2
del q2_page
gc.collect()
q.save(outdir / 'out.pdf')
def test_reverse_pages(resources, outdir):
q = Pdf.open(resources / "fourpages.pdf")
qr = Pdf.open(resources / "fourpages.pdf")
lengths = [int(page.Contents.stream_dict.Length) for page in q.pages]
qr.pages.reverse()
qr.save(outdir / "reversed.pdf")
for n, length in enumerate(lengths):
assert q.pages[n].Contents.stream_dict.Length == length
for n, length in enumerate(reversed(lengths)):
assert qr.pages[n].Contents.stream_dict.Length == length
def test_evil_page_deletion(resources, outdir):
# str needed for py<3.6
copy(str(resources / 'sandwich.pdf'), str(outdir / 'sandwich.pdf'))
src = Pdf.open(outdir / 'sandwich.pdf')
pdf = Pdf.open(resources / 'graph.pdf')
assert refcount(src) == 2
pdf.pages.append(src.pages[0])
assert refcount(src) == 3
del src.pages[0]
gc.collect()
assert refcount(src) == 3
with suppress(PermissionError): # Fails on Windows
(outdir / 'sandwich.pdf').unlink()
pdf.save(outdir / 'out.pdf')
del pdf.pages[0]
pdf.save(outdir / 'out2.pdf')
del pdf.pages[0]
pdf.save(outdir / 'out_nopages.pdf')
del pdf
gc.collect()
# Ideally we'd see the check_refcount(src, 2) at this point, but we don't
# have a way to find out when a PDF can be closed if a page was copied out
# of it to another PDF
def test_append_all(sandwich, fourpages, outdir):
pdf = sandwich
pdf2 = fourpages
for page in pdf2.pages:
pdf.pages.append(page)
assert len(pdf.pages) == 5
pdf.save(outdir / 'out.pdf')
def test_extend_delete(sandwich, fourpages, outdir):
pdf = sandwich
pdf2 = fourpages
pdf.pages.extend(pdf2.pages)
assert len(pdf.pages) == 5
del pdf.pages[2:4]
pdf.save(outdir / 'out.pdf')
def test_slice_unequal_replacement(fourpages, sandwich, outdir):
pdf = fourpages
pdf2 = sandwich
assert len(pdf.pages[1:]) != len(pdf2.pages)
page0_content_len = int(pdf.pages[0].Contents.Length)
page1_content_len = int(pdf.pages[1].Contents.Length)
pdf.pages[1:] = pdf2.pages
assert len(pdf.pages) == 2, "number of pages must be changed"
pdf.save(outdir / 'out.pdf')
assert (
pdf.pages[0].Contents.Length == page0_content_len
), "page 0 should be unchanged"
assert (
pdf.pages[1].Contents.Length != page1_content_len
), "page 1's contents should have changed"
def test_slice_with_step(fourpages, sandwich, outdir):
pdf = fourpages
pdf2 = sandwich
pdf2.pages.extend(pdf2.pages[:])
assert len(pdf2.pages) == 2
pdf2_content_len = int(pdf2.pages[0].Contents.Length)
pdf.pages[0::2] = pdf2.pages
pdf.save(outdir / 'out.pdf')
assert all(page.Contents.Length == pdf2_content_len for page in pdf.pages[0::2])
def test_slice_differing_lengths(fourpages, sandwich):
pdf = fourpages
pdf2 = sandwich
with pytest.raises(ValueError, message="attempt to assign"):
pdf.pages[0::2] = pdf2.pages[0:1]
@pytest.mark.timeout(1)
def test_self_extend(fourpages):
pdf = fourpages
with pytest.raises(
ValueError, message="source page list modified during iteration"
):
pdf.pages.extend(pdf.pages)
def test_one_based_pages(fourpages):
pdf = fourpages
assert pdf.pages.p(1) == pdf.pages[0]
assert pdf.pages.p(4) == pdf.pages[-1]
with pytest.raises(IndexError):
pdf.pages.p(5)
with pytest.raises(IndexError):
pdf.pages.p(0)
def test_page_contents_add(graph, outdir):
pdf = graph
mat = PdfMatrix().rotated(45)
stream1 = Stream(pdf, b'q ' + mat.encode() + b' cm')
stream2 = Stream(pdf, b'Q')
pdf.pages[0].page_contents_add(stream1, True)
pdf.pages[0].page_contents_add(stream2, False)
pdf.save(outdir / 'out.pdf')
def test_bad_access(fourpages):
pdf = fourpages
with pytest.raises(IndexError):
pdf.pages[-100]
with pytest.raises(IndexError):
pdf.pages[500]
def test_bad_insert(fourpages):
pdf = fourpages
with pytest.raises(TypeError):
pdf.pages.insert(0, 'this is a string not a page')
def test_negative_indexing(fourpages, graph):
fourpages.pages[-1]
fourpages.pages[-1] = graph.pages[-1]
del fourpages.pages[-1]
fourpages.pages.insert(-2, graph.pages[-1])
with pytest.raises(IndexError):
fourpages.pages[-42]
with pytest.raises(IndexError):
fourpages.pages[-42] = graph.pages[0]
with pytest.raises(IndexError):
del fourpages.pages[-42]
def test_concatenate(resources, outdir):
# Issue #22
def concatenate(n):
print('concatenating same page', n, 'times')
output_pdf = Pdf.new()
for i in range(n):
print(i)
pdf_page = Pdf.open(resources / 'pal.pdf')
output_pdf.pages.extend(pdf_page.pages)
output_pdf.save(outdir / '{}.pdf'.format(n))
concatenate(5)
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