mirror of https://go.googlesource.com/go
163 lines
4.0 KiB
Go
163 lines
4.0 KiB
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 godebug_test
|
|
|
|
import (
|
|
"fmt"
|
|
. "internal/godebug"
|
|
"internal/race"
|
|
"internal/testenv"
|
|
"os"
|
|
"os/exec"
|
|
"reflect"
|
|
"runtime/metrics"
|
|
"slices"
|
|
"strings"
|
|
"testing"
|
|
)
|
|
|
|
func TestGet(t *testing.T) {
|
|
foo := New("#foo")
|
|
tests := []struct {
|
|
godebug string
|
|
setting *Setting
|
|
want string
|
|
}{
|
|
{"", New("#"), ""},
|
|
{"", foo, ""},
|
|
{"foo=bar", foo, "bar"},
|
|
{"foo=bar,after=x", foo, "bar"},
|
|
{"before=x,foo=bar,after=x", foo, "bar"},
|
|
{"before=x,foo=bar", foo, "bar"},
|
|
{",,,foo=bar,,,", foo, "bar"},
|
|
{"foodecoy=wrong,foo=bar", foo, "bar"},
|
|
{"foo=", foo, ""},
|
|
{"foo", foo, ""},
|
|
{",foo", foo, ""},
|
|
{"foo=bar,baz", New("#loooooooong"), ""},
|
|
}
|
|
for _, tt := range tests {
|
|
t.Setenv("GODEBUG", tt.godebug)
|
|
got := tt.setting.Value()
|
|
if got != tt.want {
|
|
t.Errorf("get(%q, %q) = %q; want %q", tt.godebug, tt.setting.Name(), got, tt.want)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestMetrics(t *testing.T) {
|
|
const name = "http2client" // must be a real name so runtime will accept it
|
|
|
|
var m [1]metrics.Sample
|
|
m[0].Name = "/godebug/non-default-behavior/" + name + ":events"
|
|
metrics.Read(m[:])
|
|
if kind := m[0].Value.Kind(); kind != metrics.KindUint64 {
|
|
t.Fatalf("NonDefault kind = %v, want uint64", kind)
|
|
}
|
|
|
|
s := New(name)
|
|
s.Value()
|
|
s.IncNonDefault()
|
|
s.IncNonDefault()
|
|
s.IncNonDefault()
|
|
metrics.Read(m[:])
|
|
if kind := m[0].Value.Kind(); kind != metrics.KindUint64 {
|
|
t.Fatalf("NonDefault kind = %v, want uint64", kind)
|
|
}
|
|
if count := m[0].Value.Uint64(); count != 3 {
|
|
t.Fatalf("NonDefault value = %d, want 3", count)
|
|
}
|
|
}
|
|
|
|
// TestPanicNilRace checks for a race in the runtime caused by use of runtime
|
|
// atomics (not visible to usual race detection) to install the counter for
|
|
// non-default panic(nil) semantics. For #64649.
|
|
func TestPanicNilRace(t *testing.T) {
|
|
if !race.Enabled {
|
|
t.Skip("Skipping test intended for use with -race.")
|
|
}
|
|
if os.Getenv("GODEBUG") != "panicnil=1" {
|
|
cmd := testenv.CleanCmdEnv(testenv.Command(t, os.Args[0], "-test.run=^TestPanicNilRace$", "-test.v", "-test.parallel=2", "-test.count=1"))
|
|
cmd.Env = append(cmd.Env, "GODEBUG=panicnil=1")
|
|
out, err := cmd.CombinedOutput()
|
|
t.Logf("output:\n%s", out)
|
|
|
|
if err != nil {
|
|
t.Errorf("Was not expecting a crash")
|
|
}
|
|
return
|
|
}
|
|
|
|
test := func(t *testing.T) {
|
|
t.Parallel()
|
|
defer func() {
|
|
recover()
|
|
}()
|
|
panic(nil)
|
|
}
|
|
t.Run("One", test)
|
|
t.Run("Two", test)
|
|
}
|
|
|
|
func TestCmdBisect(t *testing.T) {
|
|
testenv.MustHaveGoBuild(t)
|
|
out, err := exec.Command("go", "run", "cmd/vendor/golang.org/x/tools/cmd/bisect", "GODEBUG=buggy=1#PATTERN", os.Args[0], "-test.run=^TestBisectTestCase$").CombinedOutput()
|
|
if err != nil {
|
|
t.Fatalf("exec bisect: %v\n%s", err, out)
|
|
}
|
|
|
|
var want []string
|
|
src, err := os.ReadFile("godebug_test.go")
|
|
for i, line := range strings.Split(string(src), "\n") {
|
|
if strings.Contains(line, "BISECT"+" "+"BUG") {
|
|
want = append(want, fmt.Sprintf("godebug_test.go:%d", i+1))
|
|
}
|
|
}
|
|
slices.Sort(want)
|
|
|
|
var have []string
|
|
for _, line := range strings.Split(string(out), "\n") {
|
|
if strings.Contains(line, "godebug_test.go:") {
|
|
have = append(have, line[strings.LastIndex(line, "godebug_test.go:"):])
|
|
}
|
|
}
|
|
slices.Sort(have)
|
|
|
|
if !reflect.DeepEqual(have, want) {
|
|
t.Errorf("bad bisect output:\nhave %v\nwant %v\ncomplete output:\n%s", have, want, string(out))
|
|
}
|
|
}
|
|
|
|
// This test does nothing by itself, but you can run
|
|
//
|
|
// bisect 'GODEBUG=buggy=1#PATTERN' go test -run='^TestBisectTestCase$'
|
|
//
|
|
// to see that the GODEBUG bisect support is working.
|
|
// TestCmdBisect above does exactly that.
|
|
func TestBisectTestCase(t *testing.T) {
|
|
s := New("#buggy")
|
|
for i := 0; i < 10; i++ {
|
|
a := s.Value() == "1"
|
|
b := s.Value() == "1"
|
|
c := s.Value() == "1" // BISECT BUG
|
|
d := s.Value() == "1" // BISECT BUG
|
|
e := s.Value() == "1" // BISECT BUG
|
|
|
|
if a {
|
|
t.Log("ok")
|
|
}
|
|
if b {
|
|
t.Log("ok")
|
|
}
|
|
if c {
|
|
t.Error("bug")
|
|
}
|
|
if d &&
|
|
e {
|
|
t.Error("bug")
|
|
}
|
|
}
|
|
}
|