def test_nonNumber_fibonacci(cls):
     fibonacci("string")
 def test_negative_fibonacci(cls):
     fibonacci(-1)
 def test_noninteger_fibonacci(cls):
     fibonacci(3.14)
 def check_fibonacci(cls, a):
     result = fibonacci(a)
     real_result = cls.fibonacci_seq[a]
     assert_equals(result, real_result)