1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
import antlr3
import testbase
import unittest
class t015calc(testbase.ANTLRTest):
def setUp(self):
self.compileGrammar()
def _evaluate(self, expr, expected, errors=[]):
cStream = antlr3.StringStream(expr)
lexer = self.getLexer(cStream)
tStream = antlr3.CommonTokenStream(lexer)
parser = self.getParser(tStream)
result = parser.evaluate()
assert result == expected, "%r != %r" % (result, expected)
assert len(parser.reportedErrors) == len(errors), parser.reportedErrors
def testValid01(self):
self._evaluate("1 + 2", 3)
def testValid02(self):
self._evaluate("1 + 2 * 3", 7)
def testValid03(self):
self._evaluate("10 / 2", 5)
def testValid04(self):
self._evaluate("6 + 2*(3+1) - 4", 10)
def testMalformedInput(self):
self._evaluate("6 - (2*1", 4, ["mismatched token at pos 8"])
# FIXME: most parse errors result in TypeErrors in action code, because
# rules return None, which is then added/multiplied... to integers.
# evaluate("6 - foo 2", 4, ["some error"])
if __name__ == '__main__':
unittest.main()
|
