Golang`select`似乎不公平

参见英文答案 > golang: How the select worked when multiple channel involved?????????????????????????????????????3个
我是Golang的初学者,我从官方 spec of select中读到,当更多的通信可以继续进行时,我会做统一的伪随机,但是当我尝试下面的代码时

package main

import (
    "fmt"
)

func main() {

    // For our example we'll select across two channels.
    c1 := make(chan string)
    c2 := make(chan string)

    go func() {
        for {
            c1 <- "one"
        }
    }()
    go func() {
        for {
            c2 <- "two"
        }
    }()

    for i := 0; i < 100; i++ {
        select {
        case msg1 := <-c1:
            fmt.Println("received",msg1)
        case msg2 := <-c2:
            fmt.Println("received",msg2)
        }
    }
}

它总是打印’收到两个’,似乎不是随机的结果,所以我在哪里错了？

代码可以是测试here.