英文:
Undefined errors causing go test to fail
问题
我在运行go test时遇到了问题，我设置了一个测试。当我运行go test时，另一个文件中的方法（不在测试文件中）会抛出以下错误：
# GoPackage [GoPackage.test]
./io.go:100:17: undefined: unix.EpollEvent
./io.go:101:22: undefined: unix.EpollEvent
./io.go:121:20: undefined: unix.EpollCreate1
./io.go:135:22: undefined: unix.EPOLLPRI
./io.go:140:16: undefined: unix.EpollCtl
./io.go:141:36: undefined: unix.EPOLL_CTL_ADD
./io.go:145:19: undefined: unix.EpollWait
FAIL GoPackage [build failed]
注意：io.go 导入了golang.org/x/sys/unix，这是这些 unix 系统调用的来源。io.go 中的一个示例是：
var event unix.EpollEvent
如果我注释掉原始方法并创建一个虚拟版本来运行测试，测试将成功运行。
我在 MacOS 上构建/运行测试，我已经阅读到这些系统调用在 Mac 上不可用（https://github.com/golang/go/issues/30539）。
有没有办法解决在 Mac 上测试 go 构建的问题？有没有办法阻止这些消息阻止测试运行？
谢谢！
英文:
I'm running into an issue when running go test with a test I've set up. There is method in another file (not in the test file) that throws the following errors when I run go test:
# GoPackage [GoPackage.test]
./io.go:100:17: undefined: unix.EpollEvent
./io.go:101:22: undefined: unix.EpollEvent
./io.go:121:20: undefined: unix.EpollCreate1
./io.go:135:22: undefined: unix.EPOLLPRI
./io.go:140:16: undefined: unix.EpollCtl
./io.go:141:36: undefined: unix.EPOLL_CTL_ADD
./io.go:145:19: undefined: unix.EpollWait
FAIL GoPackage [build failed]
Note: io.go has an import for golang.org/x/sys/unix which is where these unix syscalls come from. One example in io.go is:
var event unix.EpollEvent
If I comment out the original method and create a dummy version and run the test, the test runs successfully.
I'm building/running the test on a MacOS and I've read the syscalls aren't available on Mac (https://github.com/golang/go/issues/30539).
Is there a way to get around this issue of testing a go build on a Mac? Is there a way to suppress these messages from preventing the test from running?
Thanks!
答案1
得分: 2
你会根据平台的不同切换包含的文件版本，例如：
io_linux.go
//go:build linux
// +build linux
import (
"golang.org/x/sys/unix"
)
func DoSomething() {
unix.EpollCreate(10)
}
io_other.go
//go:build !linux
// +build !linux
func DoSomething() {
// 什么都不做，不支持 EpollCreate
}
现在当你构建时，如果是 Linux，它将包含 io_linux.go，否则将包含 io_other.go。
英文:
You'd want to switch out which version of that file is included depending on the platform, so e.g.
> io_linux.go
//go:build linux
// +build linux
import (
"golang.org/x/sys/unix"
)
func DoSomething() {
unix.EpollCreate(10)
}
> io_other.go
//go:build !linux
// +build !linux
func DoSomething() {
// do nothing, EpollCreate not supported
}
and now when you build, if it's linux, it will include io_linux.go, otherwise it will include io_other.go
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论