def function_should_return_a_generator(self):
expect(type(fibonacci_sequence(1))).to.equal(GeneratorType)
def shouldnt_allow(self, limit_type):
gen = fibonacci_sequence(limit_type)
expect(next, [gen]).to.raise_a(TypeError)
def shouldnt_allow_a_limit_less_than_one(self):
gen = fibonacci_sequence(0)
expect(next, [gen]).to.raise_a(ValueError)
def shouldnt_allow_negative_numbers(self):
gen = fibonacci_sequence(-1)
expect(next, [gen]).to.raise_a(ValueError)
def can_generate_the(self, limit, value):
sequence = [num for num in fibonacci_sequence(limit)]
expect(len(sequence)).to.equal(limit)
expect(sequence[-1]).to.equal(value)
