How to use Fatalf method of logger Package

Best Gauge code snippet using logger.Fatalf

syslog_test.go

Source:syslog_test.go

...25var serverFQN string26func TestSysLogger(t *testing.T) {27	logger := NewSysLogger(false, false)28	if logger.debug {29		t.Fatalf("Expected %t, received %t\n", false, logger.debug)30	}31	if logger.trace {32		t.Fatalf("Expected %t, received %t\n", false, logger.trace)33	}34}35func TestSysLoggerWithDebugAndTrace(t *testing.T) {36	logger := NewSysLogger(true, true)37	if !logger.debug {38		t.Fatalf("Expected %t, received %t\n", true, logger.debug)39	}40	if !logger.trace {41		t.Fatalf("Expected %t, received %t\n", true, logger.trace)42	}43}44func testTag(t *testing.T, exePath, expected string) {45	os.Args[0] = exePath46	if result := GetSysLoggerTag(); result != expected {47		t.Fatalf("Expected %s, received %s", expected, result)48	}49}50func restoreArg(orig string) {51	os.Args[0] = orig52}53func TestSysLoggerTagGen(t *testing.T) {54	origArg := os.Args[0]55	defer restoreArg(origArg)56	testTag(t, "nats-server", "nats-server")57	testTag(t, filepath.Join(".", "nats-server"), "nats-server")58	testTag(t, filepath.Join("home", "bin", "nats-server"), "nats-server")59	testTag(t, filepath.Join("..", "..", "nats-server"), "nats-server")60	testTag(t, "nats-server.service1", "nats-server.service1")61	testTag(t, "nats-server_service1", "nats-server_service1")62	testTag(t, "nats-server-service1", "nats-server-service1")63	testTag(t, "nats-server service1", "nats-server service1")64}65func TestSysLoggerTag(t *testing.T) {66	origArg := os.Args[0]67	defer restoreArg(origArg)68	os.Args[0] = "ServerLoggerTag"69	done := make(chan string)70	startServer(done)71	logger := NewRemoteSysLogger(serverFQN, true, true)72	logger.Noticef("foo")73	line := <-done74	data := strings.Split(line, "[")75	if len(data) != 2 {76		t.Fatalf("Unexpected syslog line %s\n", line)77	}78	if !strings.Contains(data[0], os.Args[0]) {79		t.Fatalf("Expected '%s', received '%s'\n", os.Args[0], data[0])80	}81}82func TestRemoteSysLogger(t *testing.T) {83	done := make(chan string)84	startServer(done)85	logger := NewRemoteSysLogger(serverFQN, true, true)86	if !logger.debug {87		t.Fatalf("Expected %t, received %t\n", true, logger.debug)88	}89	if !logger.trace {90		t.Fatalf("Expected %t, received %t\n", true, logger.trace)91	}92}93func TestRemoteSysLoggerNotice(t *testing.T) {94	done := make(chan string)95	startServer(done)96	logger := NewRemoteSysLogger(serverFQN, true, true)97	logger.Noticef("foo %s", "bar")98	expectSyslogOutput(t, <-done, "foo bar\n")99}100func TestRemoteSysLoggerDebug(t *testing.T) {101	done := make(chan string)102	startServer(done)103	logger := NewRemoteSysLogger(serverFQN, true, true)104	logger.Debugf("foo %s", "qux")105	expectSyslogOutput(t, <-done, "foo qux\n")106}107func TestRemoteSysLoggerDebugDisabled(t *testing.T) {108	done := make(chan string)109	startServer(done)110	logger := NewRemoteSysLogger(serverFQN, false, false)111	logger.Debugf("foo %s", "qux")112	rcvd := <-done113	if rcvd != "" {114		t.Fatalf("Unexpected syslog response %s\n", rcvd)115	}116}117func TestRemoteSysLoggerTrace(t *testing.T) {118	done := make(chan string)119	startServer(done)120	logger := NewRemoteSysLogger(serverFQN, true, true)121	logger.Tracef("foo %s", "qux")122	expectSyslogOutput(t, <-done, "foo qux\n")123}124func TestRemoteSysLoggerTraceDisabled(t *testing.T) {125	done := make(chan string)126	startServer(done)127	logger := NewRemoteSysLogger(serverFQN, true, false)128	logger.Tracef("foo %s", "qux")129	rcvd := <-done130	if rcvd != "" {131		t.Fatalf("Unexpected syslog response %s\n", rcvd)132	}133}134func TestGetNetworkAndAddrUDP(t *testing.T) {135	n, a := getNetworkAndAddr("udp://foo.com:1000")136	if n != "udp" {137		t.Fatalf("Unexpected network %s\n", n)138	}139	if a != "foo.com:1000" {140		t.Fatalf("Unexpected addr %s\n", a)141	}142}143func TestGetNetworkAndAddrTCP(t *testing.T) {144	n, a := getNetworkAndAddr("tcp://foo.com:1000")145	if n != "tcp" {146		t.Fatalf("Unexpected network %s\n", n)147	}148	if a != "foo.com:1000" {149		t.Fatalf("Unexpected addr %s\n", a)150	}151}152func TestGetNetworkAndAddrUnix(t *testing.T) {153	n, a := getNetworkAndAddr("unix:///foo.sock")154	if n != "unix" {155		t.Fatalf("Unexpected network %s\n", n)156	}157	if a != "/foo.sock" {158		t.Fatalf("Unexpected addr %s\n", a)159	}160}161func expectSyslogOutput(t *testing.T, line string, expected string) {162	data := strings.Split(line, "]: ")163	if len(data) != 2 {164		t.Fatalf("Unexpected syslog line %s\n", line)165	}166	if data[1] != expected {167		t.Fatalf("Expected '%s', received '%s'\n", expected, data[1])168	}169}170func runSyslog(c net.PacketConn, done chan<- string) {171	var buf [4096]byte172	var rcvd string173	for {174		n, _, err := c.ReadFrom(buf[:])175		if err != nil || n == 0 {176			break177		}178		rcvd += string(buf[:n])179	}180	done <- rcvd181}182func startServer(done chan<- string) {183	c, e := net.ListenPacket("udp", "127.0.0.1:0")184	if e != nil {185		log.Fatalf("net.ListenPacket failed udp :0 %v", e)186	}187	serverFQN = fmt.Sprintf("udp://%s", c.LocalAddr().String())188	c.SetReadDeadline(time.Now().Add(100 * time.Millisecond))189	go runSyslog(c, done)190}...

log_test.go

Source:log_test.go

...25func TestStdLogger(t *testing.T) {26	logger := NewStdLogger(false, false, false, false, false)27	flags := logger.logger.Flags()28	if flags != 0 {29		t.Fatalf("Expected %q, received %q\n", 0, flags)30	}31	if logger.debug {32		t.Fatalf("Expected %t, received %t\n", false, logger.debug)33	}34	if logger.trace {35		t.Fatalf("Expected %t, received %t\n", false, logger.trace)36	}37}38func TestStdLoggerWithDebugTraceAndTime(t *testing.T) {39	logger := NewStdLogger(true, true, true, false, false)40	flags := logger.logger.Flags()41	if flags != log.LstdFlags|log.Lmicroseconds {42		t.Fatalf("Expected %d, received %d\n", log.LstdFlags, flags)43	}44	if !logger.debug {45		t.Fatalf("Expected %t, received %t\n", true, logger.debug)46	}47	if !logger.trace {48		t.Fatalf("Expected %t, received %t\n", true, logger.trace)49	}50}51func TestStdLoggerNotice(t *testing.T) {52	expectOutput(t, func() {53		logger := NewStdLogger(false, false, false, false, false)54		logger.Noticef("foo")55	}, "[INF] foo\n")56}57func TestStdLoggerNoticeWithColor(t *testing.T) {58	expectOutput(t, func() {59		logger := NewStdLogger(false, false, false, true, false)60		logger.Noticef("foo")61	}, "[\x1b[32mINF\x1b[0m] foo\n")62}63func TestStdLoggerDebug(t *testing.T) {64	expectOutput(t, func() {65		logger := NewStdLogger(false, true, false, false, false)66		logger.Debugf("foo %s", "bar")67	}, "[DBG] foo bar\n")68}69func TestStdLoggerDebugWithOutDebug(t *testing.T) {70	expectOutput(t, func() {71		logger := NewStdLogger(false, false, false, false, false)72		logger.Debugf("foo")73	}, "")74}75func TestStdLoggerTrace(t *testing.T) {76	expectOutput(t, func() {77		logger := NewStdLogger(false, false, true, false, false)78		logger.Tracef("foo")79	}, "[TRC] foo\n")80}81func TestStdLoggerTraceWithOutDebug(t *testing.T) {82	expectOutput(t, func() {83		logger := NewStdLogger(false, false, false, false, false)84		logger.Tracef("foo")85	}, "")86}87func TestFileLogger(t *testing.T) {88	tmpDir, err := ioutil.TempDir("", "_nats-server")89	if err != nil {90		t.Fatal("Could not create tmp dir")91	}92	defer os.RemoveAll(tmpDir)93	file, err := ioutil.TempFile(tmpDir, "nats-server:log_")94	if err != nil {95		t.Fatalf("Could not create the temp file: %v", err)96	}97	file.Close()98	logger := NewFileLogger(file.Name(), false, false, false, false)99	logger.Noticef("foo")100	buf, err := ioutil.ReadFile(file.Name())101	if err != nil {102		t.Fatalf("Could not read logfile: %v", err)103	}104	if len(buf) <= 0 {105		t.Fatal("Expected a non-zero length logfile")106	}107	if string(buf) != "[INF] foo\n" {108		t.Fatalf("Expected '%s', received '%s'\n", "[INFO] foo", string(buf))109	}110	file, err = ioutil.TempFile(tmpDir, "nats-server:log_")111	if err != nil {112		t.Fatalf("Could not create the temp file: %v", err)113	}114	file.Close()115	logger = NewFileLogger(file.Name(), true, true, true, true)116	logger.Errorf("foo")117	buf, err = ioutil.ReadFile(file.Name())118	if err != nil {119		t.Fatalf("Could not read logfile: %v", err)120	}121	if len(buf) <= 0 {122		t.Fatal("Expected a non-zero length logfile")123	}124	str := string(buf)125	errMsg := fmt.Sprintf("Expected '%s', received '%s'\n", "[pid] <date> [ERR] foo", str)126	pidEnd := strings.Index(str, " ")127	infoStart := strings.LastIndex(str, "[ERR]")128	if pidEnd == -1 || infoStart == -1 {129		t.Fatalf("%v", errMsg)130	}131	pid := str[0:pidEnd]132	if pid[0] != '[' || pid[len(pid)-1] != ']' {133		t.Fatalf("%v", errMsg)134	}135	date := str[pidEnd:infoStart]136	dateRegExp := "[0-9]{4}/[0-9]{2}/[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}.[0-9]{6}"137	reg, err := regexp.Compile(dateRegExp)138	if err != nil {139		t.Fatalf("Compile date regexp error: %v", err)140	}141	if matched := reg.Match([]byte(date)); !matched {142		t.Fatalf("Date string '%s' does not match '%s'", date, dateRegExp)143	}144	if !strings.HasSuffix(str, "[ERR] foo\n") {145		t.Fatalf("%v", errMsg)146	}147}148func expectOutput(t *testing.T, f func(), expected string) {149	old := os.Stderr // keep backup of the real stderr150	r, w, _ := os.Pipe()151	os.Stderr = w152	f()153	outC := make(chan string)154	// copy the output in a separate goroutine so printing can't block indefinitely155	go func() {156		var buf bytes.Buffer157		io.Copy(&buf, r)158		outC <- buf.String()159	}()160	os.Stderr.Close()161	os.Stderr = old // restoring the real stdout162	out := <-outC163	if out != expected {164		t.Fatalf("Expected '%s', received '%s'\n", expected, out)165	}166}...

syslog_windows_test.go

Source:syslog_windows_test.go

...38	var err error39	cmd := exec.Command("wevtutil.exe", "qe", "Application", "/q:*[System[Provider[@Name='NATS-Server']]]",40		"/rd:true", "/c:1")41	if output, err = cmd.Output(); err != nil {42		t.Fatalf("Unable to execute command: %v", err)43	}44	return strings.Contains(string(output), text)45}46// TestSysLogger tests event logging on windows47func TestSysLogger(t *testing.T) {48	checkPrivledges(t)49	logger := NewSysLogger(false, false)50	if logger.debug {51		t.Fatalf("Expected %t, received %t\n", false, logger.debug)52	}53	if logger.trace {54		t.Fatalf("Expected %t, received %t\n", false, logger.trace)55	}56	logger.Noticef("%s", "Noticef")57	if !lastLogEntryContains(t, "[NOTICE]: Noticef") {58		t.Fatalf("missing log entry")59	}60	logger.Errorf("%s", "Errorf")61	if !lastLogEntryContains(t, "[ERROR]: Errorf") {62		t.Fatalf("missing log entry")63	}64	logger.Tracef("%s", "Tracef")65	if lastLogEntryContains(t, "Tracef") {66		t.Fatalf("should not contain log entry")67	}68	logger.Debugf("%s", "Debugf")69	if lastLogEntryContains(t, "Debugf") {70		t.Fatalf("should not contain log entry")71	}72}73// TestSysLoggerWithDebugAndTrace tests event logging74func TestSysLoggerWithDebugAndTrace(t *testing.T) {75	checkPrivledges(t)76	logger := NewSysLogger(true, true)77	if !logger.debug {78		t.Fatalf("Expected %t, received %t\n", true, logger.debug)79	}80	if !logger.trace {81		t.Fatalf("Expected %t, received %t\n", true, logger.trace)82	}83	logger.Tracef("%s", "Tracef")84	if !lastLogEntryContains(t, "[TRACE]: Tracef") {85		t.Fatalf("missing log entry")86	}87	logger.Debugf("%s", "Debugf")88	if !lastLogEntryContains(t, "[DEBUG]: Debugf") {89		t.Fatalf("missing log entry")90	}91}92// TestSysLoggerWithDebugAndTrace tests remote event logging93func TestRemoteSysLoggerWithDebugAndTrace(t *testing.T) {94	checkPrivledges(t)95	logger := NewRemoteSysLogger("", true, true)96	if !logger.debug {97		t.Fatalf("Expected %t, received %t\n", true, logger.debug)98	}99	if !logger.trace {100		t.Fatalf("Expected %t, received %t\n", true, logger.trace)101	}102	logger.Tracef("NATS %s", "[TRACE]: Remote Noticef")103	if !lastLogEntryContains(t, "Remote Noticef") {104		t.Fatalf("missing log entry")105	}106}107func TestSysLoggerFatalf(t *testing.T) {108	defer func() {109		if r := recover(); r != nil {110			if !lastLogEntryContains(t, "[FATAL]: Fatalf") {111				t.Fatalf("missing log entry")112			}113		}114	}()115	checkPrivledges(t)116	logger := NewSysLogger(true, true)117	logger.Fatalf("%s", "Fatalf")118	t.Fatalf("did not panic when expected to")119}...

Fatalf

Using AI Code Generation

1import (2func main() {3    logFile, err := os.Create("log.txt")4    if err != nil {5        log.Fatalln("failed to create log file")6    }7    log.SetOutput(logFile)8    log.SetFlags(log.Lshortfile)9    log.Fatalln("fatal error")10    log.Println("executed")11}12GoLang: log.Panicln() Method13func Panicln(v ...interface{})14import (15func main() {16    logFile, err := os.Create("log.txt")17    if err != nil {18        log.Fatalln("failed to create log file")19    }20    log.SetOutput(logFile)21    log.SetFlags(log.Lshortfile)22    log.Panicln("panic error")23    log.Println("executed")24}25log.Panicln(0xc0000a3f78, 0x1, 0x1)26main.main()27GoLang: log.Panicf() Method28func Panicf(format string, v ...interface{})29import (

Fatalf

Using AI Code Generation

1import (2func main() {3	file, err := os.OpenFile("log.txt", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)4	if err != nil {5		log.Fatalln("failed to open file", err)6	}7	defer file.Close()8	log.SetOutput(file)9	log.Println("this is a log message")10}11import (12func main() {13	file, err := os.OpenFile("log.txt", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)14	if err != nil {15		log.Fatalln("failed to open file", err)16	}17	defer file.Close()18	log.SetOutput(file)19	log.Fatalf("this is a %s", "log message")20}21import (22func main() {23	file, err := os.OpenFile("log.txt", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)24	if err != nil {25		log.Fatalln("failed to open file", err)26	}27	defer file.Close()28	log.SetOutput(file)29	log.Panicln("this is a log message")30}31log.Panicln(0xc000

Fatalf

Using AI Code Generation

1import (2func main() {3    log.Fatalf("This is a fatal error")4}5import (6func main() {7    log.Fatalln("This is a fatal error")8}9import (10func main() {11    log.Fatal("This is a fatal error")12}13import (14func main() {15    log.Panicf("This is a panic error")16}17import (18func main() {19    log.Panicln("This is a panic error")20}

Fatalf

Using AI Code Generation

1import (2func main() {3	file, err := os.Create("test.txt")4	if err != nil {5		log.Fatalf("error creating file: %v", err)6	}7	defer file.Close()8	log.SetOutput(file)9	log.Println("This is a test log entry")10}11Log.Panicln() method12import (13func main() {14	log.Panicln("This is a panic log entry")15}16log.Panicln(0xc0000101b0, 0x1, 0x1)17main.main()18Log.Panicf() method19import (20func main() {21	log.Panicf("This is a %s log entry", "panic")22}23log.Panicf(0x5c5b5a, 0x1a, 0xc0000101b0, 0x1, 0

Fatalf

Using AI Code Generation

1import (2func main() {3logger := log.New(os.Stderr, "logger: ", log.Ldate|log.Ltime|log.Lshortfile)4logger.Printf("This is a regular log message")5logger.Fatalf("This is a fatal log message")6}7import (8func main() {9logger := log.New(os.Stderr, "logger: ", log.Ldate|log.Ltime|log.Lshortfile)10logger.Printf("This is a regular log message")11logger.Fatalf("This is a fatal log message")12}13import (14func main() {15logger := log.New(os.Stderr, "logger: ", log.Ldate|log.Ltime|log.Lshortfile)16logger.Printf("This is a regular log message")17logger.Fatalf("This is a fatal log message")18}

Fatalf

Using AI Code Generation

1import (2func main() {3    log.Fatalf("This is a fatal error message")4    fmt.Println("This message will not be printed")5}6import (7func main() {8    log.Panicf("This is a panic error message")9    fmt.Println("This message will not be printed")10}

Fatalf

Using AI Code Generation

1import (2func main() {3    log.Fatalf("This is a Fatalf method")4}5import (6func main() {7    log.Panicf("This is a Panicf method")8}9log.Panicf(0x4a5b6c, 0x15, 0xc00006bf40, 0x1, 0x1)

Fatalf

Using AI Code Generation

1import (2func main() {3    log.Fatalf("Fatal error")4}5import (6func main() {7    log.Fatalf("Fatal error %s", "occured")8}9import (10func main() {11    log.Fatalf("Fatal error %s", "occured")12}13import (14func main() {15    log.Fatalf("Fatal error %s", "occured")16}17import (18func main() {19    log.Fatalf("Fatal error %s", "occured")20}

Fatalf

Using AI Code Generation

1import(2func main(){3  log.Fatalf("Fatal Error")4}5import(6func main(){7  log.Panic("Panic")8}9log.Panic(0xc0000a1e18, 0x1, 0x1)10main.main()11import(12func main(){13  log.Panicf("Panic %s","Error")14}15log.Panicf(0x4e6f4a, 0xa, 0xc0000a1e18, 0x1, 0x1)16main.main()17import(18func main(){19  log.Println("Println")20}

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