def test_nonsequence_exception(self):
"""
Tests that ``is_empty()`` raises an exception when not passed a
sequence object-type.
"""
with self.assertRaises(TypeError):
task_05.is_empty(None)
def test_nonempty_string(self):
"""
Tests that ``is_empty()`` returns False when passed a non-empty string.
"""
self.assertFalse(task_05.is_empty('Ni'))
def test_empty_string(self):
"""
Tests that ``is_empty()`` returns True when passed an empty string.
"""
self.assertTrue(task_05.is_empty(''))
