1// Copyright 2013 The Go Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style 3// license that can be found in the LICENSE file. 4 5package log_test 6 7import ( 8 "bytes" 9 "fmt" 10 "log" 11) 12 13func ExampleLogger() { 14 var ( 15 buf bytes.Buffer 16 logger = log.New(&buf, "logger: ", log.Lshortfile) 17 ) 18 19 logger.Print("Hello, log file!") 20 21 fmt.Print(&buf) 22 // Output: 23 // logger: example_test.go:19: Hello, log file! 24} 25 26func ExampleLogger_Output() { 27 var ( 28 buf bytes.Buffer 29 logger = log.New(&buf, "INFO: ", log.Lshortfile) 30 31 infof = func(info string) { 32 logger.Output(2, info) 33 } 34 ) 35 36 infof("Hello world") 37 38 fmt.Print(&buf) 39 // Output: 40 // INFO: example_test.go:36: Hello world 41} 42