def test_size_adjusting1(self):
"""mmapped files must be at least PAGESIZE in size"""
_, sz, m = mmstats._init_mmap(path=self.path,
filename='mmstats-test_size_adjusting-1', size=1)
self.assertEqual(sz, mmstats.PAGESIZE)
self.assertEqual(m[:], '\x00' * mmstats.PAGESIZE)
def test_init_alt_name(self):
expected_fn = os.path.join(self.path, 'mmstats-test_init_alt_name')
self.assertFalse(os.path.exists(expected_fn))
fn, sz, m = mmstats._init_mmap(
path=self.path, filename='mmstats-test_init_alt_name')
self.assertEqual(fn, expected_fn)
self.assertTrue(os.path.exists(fn))
def test_size_adjusting2(self):
"""mmapped files must be multiples of PAGESIZE"""
_, sz, m = mmstats._init_mmap(
path=self.path,
filename='mmstats-test_size_adjusting-2',
size=(mmstats.PAGESIZE+1)
)
self.assertEqual(sz, mmstats.PAGESIZE * 2)
self.assertEqual(m[:], '\x00' * mmstats.PAGESIZE * 2)
def test_truncate(self):
"""mmapped files must be initialized with null bytes"""
fn, sz, m = mmstats._init_mmap(
path=self.path,
filename='mmstats-test_truncate',
)
m[0] = 'X'
reopened_file = open(fn)
self.assertEqual(reopened_file.read(1), 'X')
self.assertEqual(reopened_file.read(1), '\x00')
