import unittest

class Test(unittest.TestCase):
    def dec2bin(self,n):
        a = ""
        while n > 0:
                if n % 2 == 0:
                        a = "0" + a
                else: 
                        a = "1" + a
                n = n / 2
        return a

    def tearDown(self):
	"""Call after every test cases"""

    def testA(self):
	self.assertEqual(self.dec2bin(0),"0")

    def testB(self):
	assert self.dec2bin(8) == "1000"

    def testC(self):
	assert self.dec2bin(10) == "100"

if __name__ == "__main__":
    unittest.main()