- should process every number from the number source
- should evaluate every number
- should output the evaluated message for each number
- should yield the number formatted as a string
- should evaluate the first rule
- should evaluate the second rule
- should evaluate the third rule
- should evaluate the fourth rule
- should evaluate the fourth rule with the number to be evaluated
- should evaluate the fourth rule once
- should yield the last rule evaluation result that is unequal to null
- should yield "buzz"
- should yield null
- should return fizz
- should return null
- should yield "fizzbuzz"
- should yield null
- should be the equal to one
- should be equal to one hundred
- should be enumerable
- should be the equal to two