def test_tail(self):
"""
Exercise our tail() function with a variety of inputs.
"""
path = os.path.join(os.path.dirname(__file__), 'text_file')
# by file handle
with open(path, 'rb') as riddle_file:
self.assertEqual([' both the wicked and sweet.'],
list(system.tail(riddle_file, 1)))
self.assertEqual([], list(system.tail(path, 0)))
self.assertEqual([' both the wicked and sweet.'],
list(system.tail(path, 1)))
self.assertEqual(
[' both the wicked and sweet.', "but I'm with people you meet"],
list(system.tail(path, 2)))
self.assertEqual(14, len(list(system.tail(path))))
self.assertEqual(14, len(list(system.tail(path, 200))))
self.assertRaises(IOError, list, system.tail('/path/doesnt/exist'))
fd, temp_path = tempfile.mkstemp()
os.chmod(temp_path, 0o077) # remove read permissions
self.assertRaises(IOError, list, system.tail(temp_path))
os.close(fd)
os.remove(temp_path)
def test_tail(self):
"""
Exercise our tail() function with a variety of inputs.
"""
path = os.path.join(os.path.dirname(__file__), 'text_file')
# by file handle
with open(path, 'rb') as riddle_file:
self.assertEqual([' both the wicked and sweet.'], list(system.tail(riddle_file, 1)))
self.assertEqual([], list(system.tail(path, 0)))
self.assertEqual([' both the wicked and sweet.'], list(system.tail(path, 1)))
self.assertEqual([' both the wicked and sweet.', "but I'm with people you meet"], list(system.tail(path, 2)))
self.assertEqual(14, len(list(system.tail(path))))
self.assertEqual(14, len(list(system.tail(path, 200))))
self.assertRaises(IOError, list, system.tail('/path/doesnt/exist'))
fd, temp_path = tempfile.mkstemp()
os.chmod(temp_path, 0o077) # remove read permissions
self.assertRaises(IOError, list, system.tail(temp_path))
os.close(fd)
os.remove(temp_path)