vendor/github.com/go-kit/kit/log/level/example_test.go

   1 package level_test
   2
   3 import (
   4         "errors"
   5         "os"
   6
   7         "github.com/go-kit/kit/log"
   8         "github.com/go-kit/kit/log/level"
   9 )
  10
  11 func Example_basic() {
  12         // setup logger with level filter
  13         logger := log.NewLogfmtLogger(os.Stdout)
  14         logger = level.NewFilter(logger, level.AllowInfo())
  15         logger = log.With(logger, "caller", log.DefaultCaller)
  16
  17         // use level helpers to log at different levels
  18         level.Error(logger).Log("err", errors.New("bad data"))
  19         level.Info(logger).Log("event", "data saved")
  20         level.Debug(logger).Log("next item", 17) // filtered
  21
  22         // Output:
  23         // level=error caller=example_test.go:18 err="bad data"
  24         // level=info caller=example_test.go:19 event="data saved"
  25 }