import unittest
from tudelft.utilities.tools.safehash import safehash


class A:
	def __hash__(self):
		return 1
	
class B(A):
	def __hash__(self):
		return safehash(super())+1


class SafeHashTest(unittest.TestCase):

	
	def tests(self):
		lst=[1,2,3]
		safehash(lst)
		safehash({'a':1})
		safehash( set(lst))
		safehash({'a':set(lst)})
		
		h1= safehash({'a':1})
		h2= safehash({'a':2})
		self.assertNotEqual(h1,h2)
		
		h1= safehash({'a':1,'b':2})
		h2= safehash({'b':2,'a':1})
		self.assertEqual(h1,h2)

		self.assertEqual(2, safehash(B()))

		# you can a set in a set...
		#safehash(set([set(lst)]))