def test_errors():
assert_equal(scan('55elat'), [('error', '55elat')])
result = scan('Of drol cabinet 55lolo')
assert_equal(result, [('stop_word', 'of'),
('error', 'drol'),
('noun', 'cabinet'),
('error', '55lolo')])
def test_stops():
assert_equal(scan('the'), [('stop_word', 'the')])
result = scan('in of fRom at')
assert_equal(result, [('stop_word','in'),
('stop_word', 'of'),
('stop_word', 'from'),
('stop_word', 'at')])
def test_direction():
assert_equal(scan('north'), [('direction', 'north')])
result = scan("north south east")
assert_equal(result, [('direction', 'north'),
('direction', 'south'),
('direction', 'east')])
def test_numbers():
assert_equal(scan('10'), [('number', 10)])
result = scan('255 30 990')
assert_equal(result, [('number', 255),
('number', 30),
('number', 990)])
def test_nouns():
assert_equal(scan('doOr'), [('noun', 'door')])
result = scan('bear princess cabinet')
assert_equal(result, [('noun', 'bear'),
('noun', 'princess'),
('noun', 'cabinet')])
def test_verbs():
assert_equal(scan('go'), [('verb', 'go')])
result = scan('Go stop eat')
assert_equal(result, [('verb', 'go'),
('verb', 'stop'),
('verb', 'eat')])