def test__extract(self):
system_commands = []
def fake_system(cmd):
system_commands.append(cmd)
original_system = os.system
os.system = fake_system
filenames = ['archive.rar',
'archive.r00',
'archive.r01',
'archive.r02',]
archive = RarArchive('archive', './path', filenames)
self.assertTrue(archive._extract())
self.assertEquals(system_commands, ['unrar e ./path/archive.rar'])
os.system = original_system
