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import antlr3
import testbase
import unittest
class t017parser(testbase.ANTLRTest):
def setUp(self):
self.compileGrammar()
def parserClass(self, base):
class TestParser(base):
def __init__(self, *args, **kwargs):
base.__init__(self, *args, **kwargs)
self.reportedErrors = []
def emitErrorMessage(self, msg):
self.reportedErrors.append(msg)
return TestParser
def testValid(self):
cStream = antlr3.StringStream("int foo;")
lexer = self.getLexer(cStream)
tStream = antlr3.CommonTokenStream(lexer)
parser = self.getParser(tStream)
parser.program()
assert len(parser.reportedErrors) == 0, parser.reportedErrors
def testMalformedInput1(self):
cStream = antlr3.StringStream('int foo() { 1+2 }')
lexer = self.getLexer(cStream)
tStream = antlr3.CommonTokenStream(lexer)
parser = self.getParser(tStream)
parser.program()
# FIXME: currently strings with formatted errors are collected
# can't check error locations yet
assert len(parser.reportedErrors) == 1, parser.reportedErrors
def testMalformedInput2(self):
cStream = antlr3.StringStream('int foo() { 1+; 1+2 }')
lexer = self.getLexer(cStream)
tStream = antlr3.CommonTokenStream(lexer)
parser = self.getParser(tStream)
parser.program()
# FIXME: currently strings with formatted errors are collected
# can't check error locations yet
assert len(parser.reportedErrors) == 2, parser.reportedErrors
if __name__ == '__main__':
unittest.main()
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