def test_directions():
assert_equal(lexicon.scan("north"), [('directions', 'north')])
result = lexicon.scan("north SOUTH east")
assert_equals(result, [('directions', 'north'),
('directions', 'south'),
('directions', 'east')])
def test_errors():
assert_equal(lexicon.scan("ASDFADFASDF"), [('error', 'asdfadfasdf')])
result = lexicon.scan("bear IAS princess")
assert_equal(result, [('noun', 'bear'),
('error', 'ias'),
('noun', 'princess')])
def test_numbers():
assert_equal(lexicon.scan("2"), [('number', 2)])
result = lexicon.scan("123 64848 8989")
assert_equal(result, [('number', 123), ('number', 64848), ('number', 8989)])
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 off")
assert_equal(result, [('stop', 'the'), ('stop', 'in'), ('stop', 'off')])
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')])