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from gzip import BadGzipFile
from pathlib import Path
import pytest
from w3lib.encoding import html_to_unicode
from scrapy.http import Response
from scrapy.utils.gz import gunzip, gzip_magic_number
from tests import tests_datadir
SAMPLEDIR = Path(tests_datadir, "compressed")
class TestGunzip:
def test_gunzip_basic(self):
r1 = Response(
"http://www.example.com",
body=(SAMPLEDIR / "feed-sample1.xml.gz").read_bytes(),
)
assert gzip_magic_number(r1)
r2 = Response("http://www.example.com", body=gunzip(r1.body))
assert not gzip_magic_number(r2)
assert len(r2.body) == 9950
def test_gunzip_truncated(self):
text = gunzip((SAMPLEDIR / "truncated-crc-error.gz").read_bytes())
assert text.endswith(b"</html")
def test_gunzip_no_gzip_file_raises(self):
with pytest.raises(BadGzipFile):
gunzip((SAMPLEDIR / "feed-sample1.xml").read_bytes())
def test_gunzip_truncated_short(self):
r1 = Response(
"http://www.example.com",
body=(SAMPLEDIR / "truncated-crc-error-short.gz").read_bytes(),
)
assert gzip_magic_number(r1)
r2 = Response("http://www.example.com", body=gunzip(r1.body))
assert r2.body.endswith(b"</html>")
assert not gzip_magic_number(r2)
def test_is_gzipped_empty(self):
r1 = Response("http://www.example.com")
assert not gzip_magic_number(r1)
def test_gunzip_illegal_eof(self):
text = html_to_unicode(
"charset=cp1252", gunzip((SAMPLEDIR / "unexpected-eof.gz").read_bytes())
)[1]
expected_text = (SAMPLEDIR / "unexpected-eof-output.txt").read_text(
encoding="utf-8"
)
assert len(text) == len(expected_text)
assert text == expected_text
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