def test_read_gzip_header_filename_with_bad_compression_method(homedir):
# 9 is a bad method
header = struct.pack("<BBBBIxxHBBcccc", 31, 139, 9, 12, 0, 2, 1, 1, b"a", b"b", b"c", b"\0")
with tempfile.NamedTemporaryFile() as tf:
tf.write(header)
tf.seek(0)
with pytest.raises(OSError, match=r"Unknown compression method"):
read_gzip_header_filename(tf.name)
def test_read_gzip_header_filename(homedir):
header = struct.pack('<BBBBIxxHBBcccc', 31, 139, 8, 12, 0, 2, 1, 1, b"a",
b"b", b"c", b"\0")
with tempfile.NamedTemporaryFile() as tf:
tf.write(header)
tf.seek(0)
assert 'abc' == read_gzip_header_filename(tf.name)
def test_read_gzip_header_filename_with_bad_file(homedir):
with tempfile.NamedTemporaryFile() as tf:
tf.write(b'test')
tf.seek(0)
with pytest.raises(OSError, match=r"Not a gzipped file"):
read_gzip_header_filename(tf.name)