[antlr-interest] antlr python unit testing

[Laurie Harper]

I'm using ANTLR for Python and have my lexer and parser partially 
working. I would like to start writing unit tests to identify exactly 
what is and isn't right in what I have so far. (Call it test-first 
debugging ;-)

This is a total newbie question but, how do I pass input into my lexer 
or parser from a Python script, rather than having it come from stdin? 
Ideally, I'd like to create a lexer instance and a parser instance and 
then write unit tests that exercise specific rules with varying input, 
al la:

     import unittest
     class LexerTests(unittest.TestCase):
         def setUp(self):
             self.L = lexer()
             self.P = parser(self.L)

         def test_lexer(self):
             input = "specimen input"

             # *****
             self.L.INJECT_INPUT_CHARACTERS(input)
             # *****

             self.failUnlessEqual(some_result, self.L.nextToken())

         def test_parser(self):
             input = "specimen input"

             # *****
             self.L.INJECT_INPUT_CHARACTERS(input)
             # *****

             self.failUnlessEqual(some_result, self.P.someRule()

How do I achieve the INJECT_INPUT_CHARACTERS(input) part?

L.