def test_basic_parse(self):
input_data = """
var foo = 45 + 5.4;
var bar = foo - 2;
"""
expected_output = [
("ASSIGNMENT", ),
("NAME", "foo"),
("SYMBOL", "="),
("NUMBER", 45),
("SYMBOL", "+"),
("NUMBER", 5.4),
("SEMICOLON", ),
("ASSIGNMENT", ),
("NAME", "bar"),
("SYMBOL", "="),
("NAME", "foo"),
("SYMBOL", "-"),
("NUMBER", 2),
("SEMICOLON", ),
("EOF", )
]
p = progdata(input_data)
tokens = self.lexer.parse(p)
self.assertEqual(tokens, expected_output)
def parse(self, program):
program_data = progdata(program)
blocks = []
p = True
while p:
e = self.parse_line(program_data)
if not e:
break
blocks.append(e)
return blocks
def test_more_complex_parse(self):
input_data = """
def foo(one, two) {
var bacon = one + 2;
return bacon * (2 + two);
}
var bar = foo(2.3, 8);
"""
expected_output = [
("FUNCTIONDEF", ),
("NAME", "foo"),
("OPENPAREN", ),
("NAME", "one"),
("SYMBOL", ","),
("NAME", "two"),
("CLOSEPAREN", ),
("OPENBRACKET", ),
("ASSIGNMENT", ),
("NAME", "bacon"),
("SYMBOL", "="),
("NAME", "one"),
("SYMBOL", "+"),
("NUMBER", 2),
("SEMICOLON", ),
("FUNCTIONRETURN", ),
("NAME", "bacon"),
("SYMBOL", "*"),
("OPENPAREN", ),
("NUMBER", 2),
("SYMBOL", "+"),
("NAME", "two"),
("CLOSEPAREN", ),
("SEMICOLON", ),
("CLOSEBRACKET", ),
("ASSIGNMENT", ),
("NAME", "bar"),
("SYMBOL", "="),
("NAME", "foo"),
("OPENPAREN", ),
("NUMBER", 2.3),
("SYMBOL", ","),
("NUMBER", 8),
("CLOSEPAREN", ),
("SEMICOLON", ),
("EOF", )
]
p = progdata(input_data)
tokens = self.lexer.parse(p)
self.assertEqual(tokens, expected_output)
def test_bigger_program(self):
program = """
var foo = 2;
var bar = foo + 3;
def bam(a) {
return a + 2;
}
var bim = bam(bar);
"""
p = progdata(program)
tokens = self.lexer.parse(p)
ast = self.parser.parse(tokens)
self.assertIsInstance(ast[0], assignment)
self.assertIsInstance(ast[1], assignment)
self.assertIsInstance(ast[2], func_def)
self.assertIsInstance(ast[3], assignment)
def test_basic_assignment(self):
program = "var foo = 2;"
p = progdata(program)
tokens = self.lexer.parse(p)
ast = self.parser.parse(tokens)
self.assertIsInstance(ast[0], assignment)
def test_parse_close_paren(self):
input_data = progdata(") ")
paren = self.lexer.parse_paren(input_data)
self.assertEqual(paren, ("CLOSEPAREN", ))
self.assertEqual(input_data.remaining(), " ")
def test_parse_open_paren(self):
input_data = progdata("( ")
paren = self.lexer.parse_paren(input_data)
self.assertEqual(paren, ("OPENPAREN", ))
self.assertEqual(input_data.remaining(), " ")
def test_parse_semicolon(self):
input_data = progdata("""; """)
semicolon = self.lexer.parse_semicolon(input_data)
self.assertEqual(semicolon, ("SEMICOLON", ))
self.assertEqual(input_data.remaining(), " ")
def test_parse_symbol(self):
input_data = progdata("++ ")
symbol = self.lexer.parse_symbol(input_data)
self.assertEqual(symbol, ("SYMBOL", "++"))
self.assertEqual(input_data.remaining(), " ")
def test_parse_name(self):
input_data = progdata("name ")
name = self.lexer.parse_name(input_data)
self.assertEqual(name, ("NAME", "name"))
self.assertEqual(input_data.remaining(), " ")
def test_parse_int(self):
input_data = progdata("4467 ")
number = self.lexer.parse_number(input_data)
self.assertEqual(number, ("NUMBER", 4467))
self.assertEqual(input_data.remaining(), " ")