go cpu_test 源码
golang cpu_test 代码
文件路径：/src/internal/cpu/cpu_test.go
// Copyright 2017 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 cpu_test
import (
. "internal/cpu"
"internal/godebug"
"internal/testenv"
"os"
"os/exec"
"testing"
)
func MustHaveDebugOptionsSupport(t *testing.T) {
if !DebugOptions {
t.Skipf("skipping test: cpu feature options not supported by OS")
}
}
func MustSupportFeatureDetection(t *testing.T) {
// TODO: add platforms that do not have CPU feature detection support.
}
func runDebugOptionsTest(t *testing.T, test string, options string) {
MustHaveDebugOptionsSupport(t)
testenv.MustHaveExec(t)
env := "GODEBUG=" + options
cmd := exec.Command(os.Args[0], "-test.run="+test)
cmd.Env = append(cmd.Env, env)
output, err := cmd.CombinedOutput()
if err != nil {
t.Fatalf("%s with %s: run failed: %v output:\n%s\n",
test, env, err, string(output))
}
}
func TestDisableAllCapabilities(t *testing.T) {
MustSupportFeatureDetection(t)
runDebugOptionsTest(t, "TestAllCapabilitiesDisabled", "cpu.all=off")
}
func TestAllCapabilitiesDisabled(t *testing.T) {
MustHaveDebugOptionsSupport(t)
if godebug.Get("cpu.all") != "off" {
t.Skipf("skipping test: GODEBUG=cpu.all=off not set")
}
for _, o := range Options {
want := false
if got := *o.Feature; got != want {
t.Errorf("%v: expected %v, got %v", o.Name, want, got)
}
}
}
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