测试函数
最后更新于：2022-04-02 02:06:07
[TOC]
## 测试原则
当需要对值进行比较时,使用`equa?`进行测试。
## 实例
```
(define (add x y)
(+ x y))
(define (test-add func-res hope-res)
(cond
[(equal? hope-res func-res) true]
[else (error 'test-add "run is error func result is " func-res " expected is " hope-res)]))
(test-add (add 1 2) 3) ;#true
(test-add (add 1 2) 4) ;test-add: run is error func result is 3 expected is 4
```
equal? 可以对任何类型类型进行比较
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