xref: /aosp_15_r20/external/antlr/runtime/Python3/tests/t032subrulePredict.py (revision 16467b971bd3e2009fad32dd79016f2c7e421deb)
1*16467b97STreehugger Robotimport antlr3
2*16467b97STreehugger Robotimport testbase
3*16467b97STreehugger Robotimport unittest
4*16467b97STreehugger Robot
5*16467b97STreehugger Robot
6*16467b97STreehugger Robotclass t032subrulePredict(testbase.ANTLRTest):
7*16467b97STreehugger Robot    def setUp(self):
8*16467b97STreehugger Robot        self.compileGrammar()
9*16467b97STreehugger Robot
10*16467b97STreehugger Robot
11*16467b97STreehugger Robot    def parserClass(self, base):
12*16467b97STreehugger Robot        class TParser(base):
13*16467b97STreehugger Robot            def recover(self, input, re):
14*16467b97STreehugger Robot                # no error recovery yet, just crash!
15*16467b97STreehugger Robot                raise
16*16467b97STreehugger Robot
17*16467b97STreehugger Robot        return TParser
18*16467b97STreehugger Robot
19*16467b97STreehugger Robot
20*16467b97STreehugger Robot    def testValid1(self):
21*16467b97STreehugger Robot        cStream = antlr3.StringStream(
22*16467b97STreehugger Robot            'BEGIN A END'
23*16467b97STreehugger Robot            )
24*16467b97STreehugger Robot
25*16467b97STreehugger Robot        lexer = self.getLexer(cStream)
26*16467b97STreehugger Robot        tStream = antlr3.CommonTokenStream(lexer)
27*16467b97STreehugger Robot        parser = self.getParser(tStream)
28*16467b97STreehugger Robot        events = parser.a()
29*16467b97STreehugger Robot
30*16467b97STreehugger Robot
31*16467b97STreehugger Robot    @testbase.broken("DFA tries to look beyond end of rule b", Exception)
32*16467b97STreehugger Robot    def testValid2(self):
33*16467b97STreehugger Robot        cStream = antlr3.StringStream(
34*16467b97STreehugger Robot            ' A'
35*16467b97STreehugger Robot            )
36*16467b97STreehugger Robot
37*16467b97STreehugger Robot        lexer = self.getLexer(cStream)
38*16467b97STreehugger Robot        tStream = antlr3.CommonTokenStream(lexer)
39*16467b97STreehugger Robot        parser = self.getParser(tStream)
40*16467b97STreehugger Robot        events = parser.b()
41*16467b97STreehugger Robot
42*16467b97STreehugger Robot
43*16467b97STreehugger Robotif __name__ == '__main__':
44*16467b97STreehugger Robot    unittest.main()
45