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|
package logger
import (
"bufio"
"bytes"
"log"
"os"
"reflect"
"strings"
"testing"
)
func TestLoggingBeforeInit(t *testing.T) {
old := os.Stderr
r, w, err := os.Pipe()
if err != nil {
t.Fatal(err)
}
os.Stderr = w
// Reset
initialize()
info := "info log"
warning := "warning log"
errL := "error log"
fatal := "fatal log"
Info(info)
Warning(warning)
Error(errL)
// We don't want os.Exit in a test
defaultLogger.output(sFatal, 0, fatal)
w.Close()
os.Stderr = old
var b bytes.Buffer
scanner := bufio.NewScanner(r)
for scanner.Scan() {
b.Write(scanner.Bytes())
}
out := b.String()
for _, txt := range []string{info, warning, errL, fatal} {
if !strings.Contains(out, txt) {
t.Errorf("log output %q does not contain expected text: %q", out, txt)
}
}
}
func TestInit(t *testing.T) {
var buf1 bytes.Buffer
l1 := Init(3)
l1.SetOutput(&buf1)
if !reflect.DeepEqual(l1, defaultLogger) {
t.Fatal("defaultLogger does not match logger returned by Init")
}
// Subsequent runs of Init shouldn't change defaultLogger.
var buf2 bytes.Buffer
l2 := Init(3)
l2.SetOutput(&buf2)
if !reflect.DeepEqual(l1, defaultLogger) {
t.Error("defaultLogger should not have changed")
}
// Check log output.
l1.Info("logger #1")
l2.Info("logger #2")
defaultLogger.Info("default logger")
tests := []struct {
out string
want int
}{
{buf1.String(), 2},
{buf2.String(), 1},
}
for i, tt := range tests {
got := len(strings.Split(strings.TrimSpace(tt.out), "\n"))
if got != tt.want {
t.Errorf("logger %d wrong number of lines, want %d, got %d", i+1, tt.want, got)
}
}
}
func TestLevel(t *testing.T) {
initialize()
var buf bytes.Buffer
Init(1)
SetOutput(&buf)
Infof("info %d", sInfo)
Warningf("warning %d", sWarning)
Errorf("error %d", sError)
s := buf.String()
if strings.Contains(s, "info") {
t.Errorf("log output %q should not contain: info", s)
}
if strings.Contains(s, "warning") {
t.Errorf("log output %q should not contain: warning", s)
}
if !strings.Contains(s, "error") {
t.Errorf("log output %q should contain: error", s)
}
}
func TestFlags(t *testing.T) {
initialize()
l := Init(3)
SetFlags(log.Llongfile)
var buf bytes.Buffer
SetOutput(&buf)
l.Infof("info %d", sInfo)
s := buf.String()
if !strings.Contains(s, "info 1") {
t.Errorf("log output %q should contain: info 1", s)
}
path := "logger/logger_test.go:117"
if !strings.Contains(s, path) {
t.Errorf("log output %q should contain: %s", s, path)
}
// bonus for coverage
l.Warning("warning")
l.Warningf("warning %d", sWarning)
l.Error("error")
l.Errorf("error %d", sError)
s = buf.String()
if !strings.Contains(s, "warning") {
t.Errorf("log output %q should contain: warning", s)
}
if !strings.Contains(s, "warning 2") {
t.Errorf("log output %q should contain: warning 2", s)
}
if !strings.Contains(s, "error") {
t.Errorf("log output %q should contain: error", s)
}
if !strings.Contains(s, "error 3") {
t.Errorf("log output %q should contain: error 3", s)
}
}
|
