go clobberdead_test 源码
golang clobberdead_test 代码
文件路径：/src/cmd/compile/internal/test/clobberdead_test.go
// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package test
import (
"internal/testenv"
"io/ioutil"
"os/exec"
"path/filepath"
"testing"
)
const helloSrc = `
package main
import "fmt"
func main() { fmt.Println("hello") }
`
func TestClobberDead(t *testing.T) {
// Test that clobberdead mode generates correct program.
runHello(t, "-clobberdead")
}
func TestClobberDeadReg(t *testing.T) {
// Test that clobberdeadreg mode generates correct program.
runHello(t, "-clobberdeadreg")
}
func runHello(t *testing.T, flag string) {
if testing.Short() {
// This test rebuilds the runtime with a special flag, which
// takes a while.
t.Skip("skip in short mode")
}
testenv.MustHaveGoRun(t)
t.Parallel()
tmpdir := t.TempDir()
src := filepath.Join(tmpdir, "x.go")
err := ioutil.WriteFile(src, []byte(helloSrc), 0644)
if err != nil {
t.Fatalf("write file failed: %v", err)
}
cmd := exec.Command(testenv.GoToolPath(t), "run", "-gcflags=all="+flag, src)
out, err := cmd.CombinedOutput()
if err != nil {
t.Fatalf("go run failed: %v\n%s", err, out)
}
if string(out) != "hello\n" {
t.Errorf("wrong output: got %q, want %q", out, "hello\n")
}
}
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