def test_directions():
assert_equal(lexicon.scan('north'), [('direction', 'north')])
result = lexicon.scan('north south east')
assert_equal(result, [('direction', 'north'), ('direction', 'south'),
('direction', 'east')])
def test_errors():
assert_equal(lexicon.scan('ASDFADFADFAD'), [('Error', 'ASDFADFADFAD')])
result = lexicon.scan('bear IAS princess')
assert_equal(result, [('noun', 'bear'), ('Error', 'IAS'),
('noun', 'princess')])
def test_numbers():
assert_equal(lexicon.scan('1234'), [('number', '1234')])
result = lexicon.scan('3 15475')
assert_equal(result, [('number', '3'), ('number', '15475')])
def test_nouns():
assert_equal(lexicon.scan('bear'), [('noun', 'bear')])
result = lexicon.scan('bear princess')
assert_equal(result, [('noun', 'bear'), ('noun', 'princess')])
def test_stops():
assert_equal(lexicon.scan('the'), [('stop', 'the')])
result = lexicon.scan('the in of')
assert_equal(result, [('stop', 'the'), ('stop', 'in'), ('stop', 'of')])
def test_verbs():
assert_equal(lexicon.scan('go'), [('verb', 'go')])
result = lexicon.scan('go kill eat')
assert_equal(result, [('verb', 'go'), ('verb', 'kill'), ('verb', 'eat')])