def test_equal_1(self): self.assertEqual(binary_array_to_number([0, 0, 0, 1]), 1)
def test_equal_2(self): self.assertEqual(binary_array_to_number([0, 0, 1, 0]), 2)
def test_equal_3(self): self.assertEqual(binary_array_to_number([1, 1, 1, 1]), 15)