用法:go test [build/test flags] [packages] [build/test flags & test binary flags] go test 自动测试通过导入路径命名的包。命令按下面的格式打印测试结果的概要: ok archive/tar 0.011s FAIL archive/zip 0.022s ok compress/gzip 0.033s ... 之后是每个失败的包的
/* Exercise: Images Remember the picture generator you wrote earlier? Let's write another one, but this time it will return an implementation of image.Image instead of a slice of data. Define your own Image type, implement the necessary methods, and call pic.ShowImage. Bounds should return a image.Rectangle, like image.Rect(0, 0, w, h). ColorModel should return color.RGBAModel. At should return a color; the value v in the last picture generator corresponds to color.