def test_is_not_zero_mmap_head(aligned_buffer):
aligned_buffer[15:16] = b"x"
assert not ioutil.is_zero(aligned_buffer)
def test_is_not_zero_mmap(aligned_buffer):
aligned_buffer[-1:] = b"x"
assert not ioutil.is_zero(aligned_buffer)
def test_is_zero_mmap(aligned_buffer):
assert ioutil.is_zero(aligned_buffer)
def test_is_not_zero_memoryview(buf):
assert not ioutil.is_zero(memoryview(buf))
def test_is_not_zero(buf):
assert not ioutil.is_zero(buf)
def test_is_zero(buf):
assert ioutil.is_zero(buf)
def test_is_zero_empty_memoryview(buf):
assert ioutil.is_zero(memoryview(buf))
