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import gc
import sys
import pytest
from pikepdf import Pdf
# This will break on pypy, but we're not quite targetting pypy...
from sys import getrefcount as refcount
# Try to do some things without blowing up
def test_access_image(resources):
pdf = Pdf.open(resources / 'congress.pdf')
assert refcount(pdf) == 2 # refcount is always +1
im0 = pdf.pages[0].Resources.XObject['/Im0']
assert refcount(pdf) == 3, "didn't acquire a reference to owner"
del pdf
gc.collect()
im0.read_raw_bytes()
def test_access_page(resources):
pdf = Pdf.open(resources / 'graph.pdf')
page0 = pdf.pages[0]
also_page0 = pdf.pages.p(1)
assert refcount(pdf) == 4, "didn't acquire a reference to owner"
del pdf
gc.collect()
page0.Contents.read_raw_bytes()
del page0
gc.collect()
also_page0.Contents.read_raw_bytes()
def test_remove_pdf_and_all_pages(resources):
pdf = Pdf.open(resources / 'graph.pdf')
page0 = pdf.pages[0]
contents = page0.Contents
assert refcount(pdf) == 4, "stream didn't acquire reference to owner"
del pdf
del page0
gc.collect()
contents.read_raw_bytes()
del contents
gc.collect()
def test_access_pdf_metadata(resources):
pdf = Pdf.open(resources / 'graph.pdf')
meta = pdf.Root.Metadata
del pdf
gc.collect()
meta.read_raw_bytes()
def test_transfer_page(resources):
pdf = Pdf.open(resources / 'graph.pdf')
page0 = pdf.pages[0]
before = page0.Contents.read_bytes()
assert refcount(pdf) == 3 # this, pdf, page0->pdf
assert refcount(page0) == 2
pdf2 = Pdf.open(resources / 'fourpages.pdf')
pdf2.pages.insert(2, page0)
p2p2 = pdf2.pages[2]
assert refcount(pdf) == 4 # this, pdf, page0->pdf, pdf2's page0
assert refcount(p2p2) == 2
del pdf
del page0
assert refcount(p2p2) == 2
del pdf2.pages[2]
assert before == p2p2.Contents.read_bytes()
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