def test_for_correct_output(self):
     self.assertEquals(generate_primes(15),[2,3,5,7,11,13])
 def test_for_number_input(self):
     self.assertEquals(generate_primes('w22'), 'Please input a valid number!')
 def test_for_not_zero(self):
 	self.assertEquals(generate_primes(0), 'Please input a positive number.')
 def test_for_not_one(self):
 	self.assertEquals(generate_primes(1), 'Please input a number greater than 1.')
 def test_for_negative_input(self):
 	self.assertEquals(generate_primes(-2), 'Please input a positive number.')