def test_tokens_part9():
"""New tokens from part 9 or the tutorial"""
records = (
(':=', my_spi.ASSIGN, ':='),
('.', my_spi.DOT, '.'),
('number', my_spi.ID, 'number'),
(';', my_spi.SEMI, ';'),
('BEGIN', my_spi.BEGIN, 'BEGIN'),
('END', my_spi.END, 'END'),
)
for text, tok_type, tok_val in records:
lexer = my_spi.Lexer(text)
token = lexer.get_next_token()
assert token.type == tok_type
assert token.value == tok_val
def test_lexer_subtraction():
lexer = my_spi.Lexer(" 32 - 3 ")
token = lexer.get_next_token()
assert token.type == my_spi.INTEGER
assert token.value == 32
token = lexer.get_next_token()
assert token.type == my_spi.MINUS
assert token.value == "-"
token = lexer.get_next_token()
assert token.type == my_spi.INTEGER
assert token.value == 3
token = lexer.get_next_token()
assert token.type == my_spi.EOF
assert token.value is None
def test_lexer_addition():
lexer = my_spi.Lexer("2+3")
token = lexer.get_next_token()
assert token.type == my_spi.INTEGER
assert token.value == 2
token = lexer.get_next_token()
assert token.type == my_spi.PLUS
assert token.value == "+"
token = lexer.get_next_token()
assert token.type == my_spi.INTEGER
assert token.value == 3
token = lexer.get_next_token()
assert token.type == my_spi.EOF
assert token.value is None
def test_lexer_multidigit_integer():
lexer = my_spi.Lexer("234")
token = lexer.get_next_token()
assert token.type == my_spi.INTEGER
assert token.value == 234
def test_lexer_whitespace():
lexer = my_spi.Lexer(" 23")
token = lexer.get_next_token()
assert token.type == my_spi.INTEGER
assert token.value == 23
def test_lexer_right_paren():
lexer = my_spi.Lexer(")")
token = lexer.get_next_token()
assert token.type == my_spi.RPAREN
assert token.value == ")"
def test_lexer_eof():
lexer = my_spi.Lexer("-")
token = lexer.get_next_token()
token = lexer.get_next_token()
assert token.type == my_spi.EOF
def test_lexer_minus():
lexer = my_spi.Lexer("-")
token = lexer.get_next_token()
assert token.type == my_spi.MINUS
assert token.value == "-"
def test_lexer_plus():
lexer = my_spi.Lexer("+")
token = lexer.get_next_token()
assert token.type == my_spi.PLUS
assert token.value == "+"
def make_interpreter(text):
lexer = my_spi.Lexer(text)
parser = my_spi.Parser(lexer)
return my_spi.Interpreter(parser)
def calc(text):
lexer = my_spi.Lexer(text)
parser = my_spi.Parser(lexer)
interpreter = my_spi.Interpreter(parser)
return interpreter.calc()