def test_loop_creation_no_truncate(self, path_exists, create_loopback,
loopbacks):
"""It does not create a new sparse image for loopback if one exists"""
loopbacks.return_value = {}
path_exists.return_value = True
with patch('subprocess.check_call') as check_call:
loopback.ensure_loopback_device('/tmp/foo.img', '15G')
self.assertFalse(check_call.called)
def test_loop_creation_no_truncate(self, path_exists, create_loopback,
loopbacks):
"""It does not create a new sparse image for loopback if one exists"""
loopbacks.return_value = {}
path_exists.return_value = True
with patch('subprocess.check_call') as check_call:
loopback.ensure_loopback_device('/tmp/foo.img', '15G')
self.assertFalse(check_call.called)
def test_ensure_loopback_creation(self, path_exists, create_loopback,
loopbacks):
"""It creates a new sparse image for loopback if one does not exists"""
loopbacks.return_value = {}
path_exists.return_value = False
create_loopback.return_value = '/dev/loop0'
with patch(STORAGE_LINUX_LOOPBACK + '.check_call') as check_call:
loopback.ensure_loopback_device('/tmp/foo.img', '15G')
check_call.assert_called_with(['truncate', '--size', '15G',
'/tmp/foo.img'])
def test_ensure_loopback_creation(self, path_exists, create_loopback,
loopbacks):
"""It creates a new sparse image for loopback if one does not exists"""
loopbacks.return_value = {}
path_exists.return_value = False
create_loopback.return_value = '/dev/loop0'
with patch(STORAGE_LINUX_LOOPBACK + '.check_call') as check_call:
loopback.ensure_loopback_device('/tmp/foo.img', '15G')
check_call.assert_called_with(['truncate', '--size', '15G',
'/tmp/foo.img'])
def test_loopback_create_already_exists(self, loopbacks, check_call,
create):
"""It finds existing loopback device for requested file"""
loopbacks.return_value = {'/dev/loop1': '/tmp/bar.img'}
res = loopback.ensure_loopback_device('/tmp/bar.img', '5G')
self.assertEquals(res, '/dev/loop1')
self.assertFalse(create.called)
self.assertFalse(check_call.called)
def test_loopback_create_already_exists(self, loopbacks, check_call,
create):
"""It finds existing loopback device for requested file"""
loopbacks.return_value = {'/dev/loop1': '/tmp/bar.img'}
res = loopback.ensure_loopback_device('/tmp/bar.img', '5G')
self.assertEquals(res, '/dev/loop1')
self.assertFalse(create.called)
self.assertFalse(check_call.called)