如何在Go(lang)测试中捕获或抑制stdout? [英] How can stdout be captured or suppressed for Go(lang) testing?

问题描述

如何在Go测试中捕获或抑制stdout?

我正在尝试自学go(lang)测试.在下面的代码中，myshow.LoadPath将大量信息输出到stdout(这是正常的副作用).但是，当我运行"go test"时，确实会产生非常嘈杂的输出.有没有办法抑制或捕获stdout?

为了进行比较，我正在考虑python世界中的类似问题. http://pytest.org/latest/capture.html#captures

 程序包slideshow_test进口 ("os"测试""github.com/golliher/go-hpf/slideshow")func setupTest(){myshow:= slideshow.Slideshow {名称:这是我的节目"}myshow.LoadPath("..")}func TestStub(t * testing.T){如果true == false {t.Fail()}}func TestMain(m * testing.M){setupTest()os.Exit(m.Run())} 

解决方案

os.Stdout (由 fmt.Printf 等使用)只是一个变量.因此，您可以随时覆盖它，并在必要时将其还原. https://golang.org/pkg/os/#pkg-variables

How can stdout be captured or suppressed for Go testing?

I am trying to teach myself go(lang) testing. In the code below, myshow.LoadPath prints lots of information to stdout (which is a normal side effect). It does however make for very noisy output when I run "go test" Is there a way to suppress or capture stdout?

For comparison, I'm thinking about something like this from the python world. http://pytest.org/latest/capture.html#captures

package slideshow_test

import (
    "os"
    "testing"

    "github.com/golliher/go-hpf/slideshow"
)

func setupTest() {
    myshow := slideshow.Slideshow{Name: "This is my show"}
    myshow.LoadPath("..")

}

func TestStub(t *testing.T) {
    if true == false {
        t.Fail()
    }
}

func TestMain(m *testing.M) {
    setupTest()
    os.Exit(m.Run())

}

解决方案

os.Stdout which is used by the fmt.Printf and others is just a variable. So you can overwrite it at any time and restore it back when necessary. https://golang.org/pkg/os/#pkg-variables

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