import unittest

from gte.turmit import Turmit
from gte.rpnlib import _op_list, RpnSymbol, RpnExpr

class RpnExprTestCase(unittest.TestCase):

    def test_init(self):
        expr = RpnExpr()

    def test_random(self):
        expr = RpnExpr.random(5)
        self.assertEqual(len(expr), 5)

    def test_fromstring(self):
        expr = RpnExpr.from_string("""    5   0xFF
        X
        \tMOD""")
        self.assertEqual(len(expr), 4)
        tests = ((RpnSymbol.VALUE, 5),
                 (RpnSymbol.VALUE, 255),
                 (RpnSymbol.VARIABLE, 'x'),
                 (RpnSymbol.OPERATION, 'mod'))
        for i, (optype, val) in enumerate(tests):
            self.assertEqual(expr[i].optype, optype)
            self.assertEqual(expr[i].value, val)