## Creature Project
## CSC323: Group 1: Nora, Terian, Josh, and Jordan
## 4/7/10
## DirectionalTestPredicate.py: Contains test for neighbors in a certain direction.
###Borrowed code from Group 0

from Predicate import *
from enum import Direction

class DirectionalTestPredicate(TestPredicate):
    """compares the state of the creature at direction desiredNum to desiredSpecies"""
    def holds(self, world, location):
        x = location[0] + self.desiredNum[0]
        y = location[1] + self.desiredNum[1]
        creat = world.getCreature(x, y).getSpecies()
        if creat == None:
            return False
        elif self.desiredSpecies == None:
            return True
        return creat == self.desiredSpecies

	def __str__(self):
    	return ''.join("(DIRECTION",' '.join((k.__str__():v.__str__() for \
    	k, vin self.desiredState)), ")")