def test_result_calc_twice(self):
dsp.process('1', self.operandstack, self.operatorstack)
dsp.process('+', self.operandstack, self.operatorstack)
dsp.process('2', self.operandstack, self.operatorstack)
dsp.process('*', self.operandstack, self.operatorstack)
dsp.process('3', self.operandstack, self.operatorstack)
self.assertEquals(7, dsp.result(self.operandstack, self.operatorstack))
self.assertEquals([], dsp._dump(self.operandstack))
self.assertEquals([], dsp._dump(self.operatorstack))
def _eval_expr(expr, wcuridx, operandstack, operatorstack):
while expr_not_end(expr, wcuridx):
c = next_char(expr, wcuridx)
if '(' == c:
dsp.push_operand(_eval_expr(expr, wcuridx, [], []), operandstack)
elif ')' == c:
return dsp.result(operandstack, operatorstack)
else:
dsp.process(c, operandstack, operatorstack)
return dsp.result(operandstack, operatorstack)
def test_num_divide_num_plus(self):
dsp.process('4', self.operandstack, self.operatorstack)
dsp.process('/', self.operandstack, self.operatorstack)
dsp.process('2', self.operandstack, self.operatorstack)
dsp.process('+', self.operandstack, self.operatorstack)
self.assertEquals([2], dsp._dump(self.operandstack))
self.assertEquals(['+'], dsp._dump(self.operatorstack))
def test_num_subtract_num_divide(self):
dsp.process('4', self.operandstack, self.operatorstack)
dsp.process('-', self.operandstack, self.operatorstack)
dsp.process('2', self.operandstack, self.operatorstack)
dsp.process('/', self.operandstack, self.operatorstack)
self.assertEquals([4, 2], dsp._dump(self.operandstack))
self.assertEquals(['-', '/'], dsp._dump(self.operatorstack))
def test_num_subtract_num_plus(self):
dsp.process('3', self.operandstack, self.operatorstack)
dsp.process('-', self.operandstack, self.operatorstack)
dsp.process('2', self.operandstack, self.operatorstack)
dsp.process('+', self.operandstack, self.operatorstack)
self.assertEquals([1], dsp._dump(self.operandstack))
self.assertEquals(['+'], dsp._dump(self.operatorstack))
def test_num_multiply_num_plus(self):
dsp.process('3', self.operandstack, self.operatorstack)
dsp.process('*', self.operandstack, self.operatorstack)
dsp.process('2', self.operandstack, self.operatorstack)
dsp.process('+', self.operandstack, self.operatorstack)
self.assertEquals([6], dsp._dump(self.operandstack))
self.assertEquals(['+'], dsp._dump(self.operatorstack))
def test_result_num(self):
dsp.process('3', self.operandstack, self.operatorstack)
self.assertEquals(3, dsp.result(self.operandstack, self.operatorstack))
self.assertEquals([], dsp._dump(self.operandstack))
self.assertEquals([], dsp._dump(self.operatorstack))
