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slog: factoring out code to make the examples playable and remove unused test method

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This commit is contained in:
Xin Hao 2024-09-28 12:29:30 +08:00
parent eb6f2c24cd
commit 95c0aa1ea4
4 changed files with 21 additions and 24 deletions
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9
src/log/slog/example_level_handler_test.go
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@ -7,7 +7,6 @@ package slog_test
import (
"context"
"log/slog"
"log/slog/internal/slogtest"
"os"
)
@ -63,7 +62,13 @@ func (h *LevelHandler) Handler() slog.Handler {
// Another typical use would be to decrease the log level (to LevelDebug, say)
// during a part of the program that was suspected of containing a bug.
func ExampleHandler_levelHandler() {
th := slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{ReplaceAttr: slogtest.RemoveTime})
removeTime := func(groups []string, a slog.Attr) slog.Attr {
if a.Key == slog.TimeKey && len(groups) == 0 {
return slog.Attr{}
}
return a
}
th := slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{ReplaceAttr: removeTime})
logger := slog.New(NewLevelHandler(slog.LevelWarn, th))
logger.Info("not printed")
logger.Warn("printed")

9
src/log/slog/example_log_level_test.go
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@ -7,7 +7,6 @@ package slog_test
import (
"log"
"log/slog"
"log/slog/internal/slogtest"
"os"
)
@ -49,7 +48,13 @@ func ExampleSetLogLoggerLevel_slog() {
defer slog.SetLogLoggerLevel(currentLogLevel) // revert changes after the example
defer slog.SetDefault(slog.Default()) // revert changes after the example
slog.SetDefault(slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{ReplaceAttr: slogtest.RemoveTime})))
removeTime := func(groups []string, a slog.Attr) slog.Attr {
if a.Key == slog.TimeKey && len(groups) == 0 {
return slog.Attr{}
}
return a
}
slog.SetDefault(slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{ReplaceAttr: removeTime})))
log.Print("error") // level=ERROR msg=error

9
src/log/slog/example_logvaluer_secret_test.go
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@ -6,7 +6,6 @@ package slog_test
import (
"log/slog"
"log/slog/internal/slogtest"
"os"
)
@ -23,7 +22,13 @@ func (Token) LogValue() slog.Value {
// with an alternative representation to avoid revealing secrets.
func ExampleLogValuer_secret() {
t := Token("shhhh!")
logger := slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{ReplaceAttr: slogtest.RemoveTime}))
removeTime := func(groups []string, a slog.Attr) slog.Attr {
if a.Key == slog.TimeKey && len(groups) == 0 {
return slog.Attr{}
}
return a
}
logger := slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{ReplaceAttr: removeTime}))
logger.Info("permission granted", "user", "Perry", "token", t)
// Output:

18
src/log/slog/internal/slogtest/slogtest.go
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@ -1,18 +0,0 @@
// Copyright 2022 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 slogtest contains support functions for testing slog.
package slogtest
import "log/slog"
// RemoveTime removes the top-level time attribute.
// It is intended to be used as a ReplaceAttr function,
// to make example output deterministic.
func RemoveTime(groups []string, a slog.Attr) slog.Attr {
if a.Key == slog.TimeKey && len(groups) == 0 {
return slog.Attr{}
}
return a
}