去：套件运行后打印文本？

Question

The testing package captures all output and will not print it unless a test fails or verbose (-v) is turned on. Is there a way to output text after the suite is finished without needing verbose turned on?

For example:

func TestMain(m *testing.M) {
    status := m.Run(m)
    fmt.Println("important line to output")
    os.Exit(status)
}

Will not print the line.

---

Edit: I have found out that fmt.Println will work if you run the tests from inside the package (go test), but not if one or more packages are specified (go test ./...) unless the -v option is enabled.

Answer 1

The testing package captures all output and will not print it unless a test fails or verbose (-v) is turned on

What makes you say that stdout is captured? If I save this code into main_test.go and run go test:

package main

import (
    "fmt"
    "os"
    "testing"
)

func TestJoe(t *testing.T) {
    fmt.Println("from joe")
}

func TestMain(m *testing.M) {
    fmt.Println("before run")
    s := m.Run()
    fmt.Println("after run")
    os.Exit(s)
}

I get:

$ go test
before run
from joe
PASS
after run

---

About output with ./..., here's an excerpt from go help test:

The second, called package list mode, occurs when go test is invoked with explicit package arguments (for example 'go test math', 'go test ./...', and even 'go test .'). In this mode, go test compiles and tests each of the packages listed on the command line. If a package test passes, go test prints only the final 'ok' summary line. If a package test fails, go test prints the full test output. If invoked with the -bench or -v flag, go test prints the full output even for passing package tests, in order to display the requested benchmark results or verbose logging.