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import pytest
import sys
import lz4.block
import psutil
import os
# This test requires allocating a big lump of memory. In order to
# avoid a massive memory allocation during byte compilation, we have
# to declare a variable for the size of the buffer we're going to
# create outside the scope of the function below. See:
# https://bugs.python.org/issue21074
_4GB = 0x100000000 # 4GB
# This test will be killed on Travis due to the 3GB memory limit
# there. Unfortunately psutil reports the host memory, not the memory
# available to the container, and so can't be used to detect available
# memory, so instead, as an ugly hack for detecting we're on Travis we
# check for the TRAVIS environment variable being set. This is quite
# fragile.
@pytest.mark.skipif(
os.environ.get('TRAVIS') is not None,
reason='Skipping test on Travis due to insufficient memory'
)
@pytest.mark.skipif(
sys.maxsize < 0xffffffff,
reason='Py_ssize_t too small for this test'
)
@pytest.mark.skipif(
psutil.virtual_memory().available < _4GB,
reason='Insufficient system memory for this test'
)
def test_huge():
try:
huge = b'\0' * _4GB
except MemoryError:
pytest.skip('Insufficient system memory for this test')
with pytest.raises(
OverflowError, match='Input too large for LZ4 API'
):
lz4.block.compress(huge)
with pytest.raises(
OverflowError, match='Dictionary too large for LZ4 API'
):
lz4.block.compress(b'', dict=huge)
with pytest.raises(
OverflowError, match='Input too large for LZ4 API'
):
lz4.block.decompress(huge)
with pytest.raises(
OverflowError, match='Dictionary too large for LZ4 API'
):
lz4.block.decompress(b'', dict=huge)
def test_dummy():
pass
|
