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"""Provide base classes for the test system"""
from unittest import TestCase
import os
import tempfile
__all__ = ['TestBase', 'FileCreator']
#{ Utilities
class FileCreator:
"""A instance which creates a temporary file with a prefix and a given size
and provides this info to the user.
Once it gets deleted, it will remove the temporary file as well."""
__slots__ = ("_size", "_path")
def __init__(self, size, prefix=''):
assert size, "Require size to be larger 0"
self._path = tempfile.mktemp(prefix=prefix)
self._size = size
with open(self._path, "wb") as fp:
fp.seek(size - 1)
fp.write(b'1')
assert os.path.getsize(self.path) == size
def __del__(self):
try:
os.remove(self.path)
except OSError:
pass
# END exception handling
def __enter__(self):
return self
def __exit__(self, exc_type, exc_value, traceback):
self.__del__()
@property
def path(self):
return self._path
@property
def size(self):
return self._size
#} END utilities
class TestBase(TestCase):
"""Foundation used by all tests"""
#{ Configuration
k_window_test_size = 1000 * 1000 * 8 + 5195
#} END configuration
#{ Overrides
@classmethod
def setUpAll(cls):
# nothing for now
pass
# END overrides
#{ Interface
#} END interface