package log_test import ( "bytes" stderr "errors" "fmt" "strings" "testing" "github.com/pkg/errors" "github.com/tendermint/tendermint/libs/log" ) func TestTracingLogger(t *testing.T) { var buf bytes.Buffer logger := log.NewTMJSONLogger(&buf) logger1 := log.NewTracingLogger(logger) err1 := errors.New("courage is grace under pressure.") err2 := errors.New("it does not matter how slowly you go, so long as you do not stop.") logger1.With("err1", err1).Info("foo", "err2", err2) want := strings.Replace( strings.Replace( `{"_msg":"foo","err1":"`+ fmt.Sprintf("%+v", err1)+ `","err2":"`+ fmt.Sprintf("%+v", err2)+ `","level":"info"}`, "\t", "", -1, ), "\n", "", -1) have := strings.Replace(strings.Replace(strings.TrimSpace(buf.String()), "\\n", "", -1), "\\t", "", -1) if want != have { t.Errorf("\nwant '%s'\nhave '%s'", want, have) } buf.Reset() logger.With( "err1", stderr.New("Opportunities don't happen. You create them."), ).Info( "foo", "err2", stderr.New("Once you choose hope, anything's possible."), ) want = `{"_msg":"foo",` + `"err1":"Opportunities don't happen. You create them.",` + `"err2":"Once you choose hope, anything's possible.",` + `"level":"info"}` have = strings.TrimSpace(buf.String()) if want != have { t.Errorf("\nwant '%s'\nhave '%s'", want, have) } buf.Reset() logger.With("user", "Sam").With("context", "value").Info("foo", "bar", "baz") want = `{"_msg":"foo","bar":"baz","context":"value","level":"info","user":"Sam"}` have = strings.TrimSpace(buf.String()) if want != have { t.Errorf("\nwant '%s'\nhave '%s'", want, have) } }