通道关闭时收到的布尔标志与 Golang 中的预期不同

Question

我有一种用于重复身份验证的类型：

type Authorizer struct {

    requester    *Requester

    closeChannel chan error

}

func (requester *Requester) Authorize(autoClose bool) {

    // Create a new authorizer from the requester and the close-channel

    authorizer := Authorizer{

        requester:    requester,

        closeChannel: requester.closer,

    }

    // Ensure that the requester has a reference to the authorizer so we can access the

    // updated token

    requester.authorizer = &authorizer

    // Begin the authentication loop concurrently

    go authorizer.manageAuthorization()

}

func (authorizer *Authorizer) manageAuthorization() {

    for {

        select {

        case _, ok := <-authorizer.closeChannel:

            if ok {

                fmt.Printf("Closed\n")

                return // NEVER RUNS

            }

        default:

            break

        }

        fmt.Printf("Not closed\n")

        // Do inner authorization logic

    }

}

此类创建身份验证器并处理请求：

type Requester struct {

    authorizer   *Authorizer

    client       *http.Client

    closer       chan error

}

func NewRequester() *Requester {

    requester := Requester{

        client: new(http.Client),

        closer: make(chan error),

    }

    requester.Authorize(false)

    return &requester

}

func (requester *Requester) Close() {

    fmt.Printf("Closing...\n")

    close(requester.closer)

}

所以，到目前为止，我的测试都通过了这段代码。但是，我在进行报道时遇到了一个有趣的问题。考虑以下代码段：

// Create the test client

client := Requester{}

client.closer = make(chan error)

// Begin authentication

client.Authorize(false)

// Now, close the channel

close(client.closer)

如果我将它嵌入到测试中并尝试使用它运行代码覆盖率，我注意到指示的行永远不会运行。此外，我在此处添加的调试消息显示如下：

Not closed

Not closed

Not closed

Closing...

Not closed

Not closed

Not closed

消息不会Closed打印。那么，我在这里做错了什么？

Answer 1

ok将false在通道关闭时。尝试case _, ok := <-authorizer.closeChannel:&nbsp; &nbsp; if !ok {&nbsp; &nbsp; &nbsp; &nbsp; return // RUNS&nbsp; &nbsp; }