func (l *Logger) output(traceskip int, err error, t LogType, s string) error {
var stack trace.Stack
if l.isTraceEnabled(t) {
stack = trace.TraceN(traceskip+1, 32)
}
var b bytes.Buffer
if t != 0 {
fmt.Fprint(&b, t, " ", s)
} else {
fmt.Fprint(&b, "[LOG] ", s)
}
if len(s) == 0 || s[len(s)-1] != '\n' {
fmt.Fprint(&b, "\n")
}
if len(stack) != 0 {
fmt.Fprint(&b, "[stack]: \n", stack.StringWithIndent(1))
}
if err != nil {
fmt.Fprint(&b, "[error]: ", err.Error(), "\n")
if stack := errors.ErrorStack(err); stack != nil {
fmt.Fprint(&b, stack.StringWithIndent(1))
}
}
s = b.String()
l.mu.Lock()
defer l.mu.Unlock()
return l.log.Output(traceskip+2, s)
}
func ErrorIsNil(t *testing.T, err error) {
if err == nil {
return
}
stack := errors.ErrorStack(err)
if stack == nil {
stack = trace.TraceN(1, 32)
}
t.Fatalf("%s\n%s", err, stack)
}