这个要熟悉原理，要能写。。
但现在。。。。。
注意，没有main函数，以_test.go结尾，命令go test -v
package main
import (
"testing"
"net/http"
)
const checkMark = " OK! "
const ballotX = " ERROR! "
func TestDownload(t *testing.T) {
url := "http://localhost:8000/test.html"
statusCode := 200
t.Log("Given the need to test downloading content.")
{
t.Logf("\tWhen checking \"%s\" for status code \"%d\"", url, statusCode)
{
resp, err := http.Get(url)
if err != nil {
t.Fatal("\tShould be able to make the Get call.", ballotX, err)
}
t.Log("\t\tShould be able to make the Get call.", checkMark)
defer resp.Body.Close()
if resp.StatusCode == statusCode {
t.Logf("\t\tShould receive a \"%d\" status, %v", statusCode, checkMark)
} else {
t.Errorf("\t\tShould receive a \"%d\" status. %v %v", statusCode, ballotX, resp.StatusCode)
}
}
}
}
