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import pytest
from pyroute2.netlink.buffer import Buffer, Page
buffer_settings = (
'mode,size,page_size',
(('internal', 10485760, 32768), ('shared', 10485760, 32768)),
)
@pytest.mark.parametrize(*buffer_settings)
def test_create_buffer(mode, size, page_size):
try:
buffer = Buffer(mode, size, page_size)
except ModuleNotFoundError:
pytest.skip(f'buffer mode "{mode}" not supported')
assert buffer.mode == mode
assert buffer.size == size
assert buffer.page_size == page_size
minimal_index = 0
maximal_index = size // page_size
assert len(buffer.directory) == maximal_index
for index, page in buffer.directory.items():
assert minimal_index <= index <= maximal_index
assert isinstance(page, Page)
assert page.offset == index * page_size
assert page.is_free is True
buffer.close()
@pytest.mark.parametrize(*buffer_settings)
def test_use_all_pages(mode, size, page_size):
try:
buffer = Buffer(mode, size, page_size)
except ModuleNotFoundError:
pytest.skip(f'buffer mode "{mode}" not supported')
maximal_index = size // page_size
marker = 0x05
for _ in range(maximal_index):
page = buffer.get_free_page()
assert not page.is_free
page.view[0] = marker
assert page.view[0] == marker
assert buffer.view[page.offset] == marker
assert buffer.buf[page.offset] == marker
marker += 1
if marker == 0xFF:
marker = 0x05
with pytest.raises(MemoryError):
buffer.get_free_page()
buffer.close()
@pytest.mark.parametrize(*buffer_settings)
def test_context_manager(mode, size, page_size):
try:
with Buffer(mode, size, page_size) as buffer:
assert buffer.mode == mode
except ModuleNotFoundError:
pytest.skip(f'buffer mode "{mode}" not supported')
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