ack
should be a function.
testString: assert(typeof ack === 'function');
- text: ack(0, 0)
should return 1.
testString: assert(ack(0, 0) === 1);
- text: ack(1, 1)
should return 3.
testString: assert(ack(1, 1) === 3);
- text: ack(2, 5)
should return 13.
testString: assert(ack(2, 5) === 13);
- text: ack(3, 3)
should return 61.
testString: assert(ack(3, 3) === 61);
```