"encoding/json"
	"fmt"
	"io"
	"log/slog"
	"strings"
	"testing"
	"testing/slogtest"
)

func TestSlogtest(t *testing.T) {
	for _, test := range []struct {
		name  string
		new   func(io.Writer) slog.Handler
		parse func([]byte) (map[string]any, error)
	}{
		{"JSON", func(w io.Writer) slog.Handler { return slog.NewJSONHandler(w, nil) }, parseJSON},

			l.Info("msg", "a", "b", slog.Group("G", slog.String("c", "d")), "e", "f")
		},
		checks: []check{
			hasAttr("a", "b"),
			inGroup("G", hasAttr("c", "d")),
			hasAttr("e", "f"),
		},
	},
	{
		name:        "empty-group",
		explanation: withSource("a Handler should ignore an empty group"),
		f: func(l *slog.Logger) {
			l.Info("msg", "a", "b", slog.Group("G"), "e", "f")
		},
		checks: []check{

			Goto("b3")),
		Bloc("b3",
			Valu("phi2", OpPhi, c.config.Types.Bool, 0, nil, "cmp1", "cmp2"),
			If("phi2", "b4", "b5")),
		Bloc("b4",
			Valu("cmp3", OpLess64, c.config.Types.Bool, 0, nil, "arg3", "arg1"),
			Goto("b5")),
		Bloc("b5",
			Valu("phi3", OpPhi, c.config.Types.Bool, 0, nil, "phi2", "cmp3"),
			If("phi3", "b6", "b7")),
		Bloc("b6",
			Exit("mem")),
		Bloc("b7",
			Exit("mem")))

	c := testConfig(t)
	ptrType := c.config.Types.BytePtr
	fun := c.Fun("entry",
		Bloc("entry",
			Valu("start", OpInitMem, types.TypeMem, 0, nil),
			Valu("sb", OpSB, c.config.Types.Uintptr, 0, nil),
			Valu("v", OpConstBool, c.config.Types.Bool, 1, nil),
			Valu("addr", OpAddr, ptrType, 0, nil, "sb"),
			Goto("loop")),
		Bloc("loop",
			Valu("phi", OpPhi, types.TypeMem, 0, nil, "start", "store"),

        assertQueryContext(

	fun := c.Fun("entry",
		Bloc("entry",
			Valu("mem", OpInitMem, types.TypeMem, 0, nil),
			Valu("sb", OpSB, c.config.Types.Uintptr, 0, nil),
			Goto("checkPtr")),
		Bloc("checkPtr",
			Valu("ptr1", OpAddr, ptrType, 0, nil, "sb"),
			Valu("bool1", OpIsNonNil, c.config.Types.Bool, 0, nil, "ptr1"),
			If("bool1", "extra", "exit")),
		Bloc("extra",
			Goto("exit")),
		Bloc("exit",
			Exit("mem")))

a global LevelVar:

	var programLevel = new(slog.LevelVar) // Info by default

Then use the LevelVar to construct a handler, and make it the default:

	h := slog.NewJSONHandler(os.Stderr, &slog.HandlerOptions{Level: programLevel})
	slog.SetDefault(slog.New(h))

Now the program can change its logging level with a single statement:

	programLevel.Set(slog.LevelDebug)

# Groups

//    registered list:
//    slot: 0 path='internal/cpu'  hard-coded id: 1
//    slot: 1 path='internal/goarch'  hard-coded id: 2
//    slot: 2 path='internal/runtime/atomic'  hard-coded id: 3
//    slot: 3 path='internal/goos'
//    slot: 4 path='runtime/internal/sys'  hard-coded id: 5
//    slot: 5 path='internal/abi'  hard-coded id: 4
//    slot: 6 path='runtime/internal/math'  hard-coded id: 6

// license that can be found in the LICENSE file.

package slog_test

import (
	"log/slog"
	"log/slog/internal/slogtest"
	"os"
)

// A token is a secret value that grants permissions.
type Token string

// LogValue implements slog.LogValuer.
// It avoids revealing the token.
func (Token) LogValue() slog.Value {
	return slog.StringValue("REDACTED_TOKEN")
}

// This example demonstrates a Value that replaces itself

// license that can be found in the LICENSE file.

package slogtest_test

import (
	"bytes"
	"encoding/json"
	"log/slog"
	"testing"
	"testing/slogtest"
)

func TestRun(t *testing.T) {
	var buf bytes.Buffer

	newHandler := func(*testing.T) slog.Handler {
		buf.Reset()
		return slog.NewJSONHandler(&buf, nil)
	}
	result := func(t *testing.T) map[string]any {
		m := map[string]any{}