Add ability to label inputs for logging (#6207)

internal/models/log_test.go

@@ -0,0 +1,70 @@
+package models
+
+import (
+	"testing"
+
+	"github.com/influxdata/telegraf/selfstat"
+	"github.com/stretchr/testify/require"
+)
+
+func TestErrorCounting(t *testing.T) {
+	iLog := Logger{Name: "inputs.test", Errs: selfstat.Register(
+		"gather",
+		"errors",
+		map[string]string{"input": "test"},
+	)}
+	iLog.Error("something went wrong")
+	iLog.Errorf("something went wrong")
+
+	aLog := Logger{Name: "aggregators.test", Errs: selfstat.Register(
+		"aggregate",
+		"errors",
+		map[string]string{"aggregator": "test"},
+	)}
+	aLog.Name = "aggregators.test"
+	aLog.Error("another thing happened")
+
+	oLog := Logger{Name: "outputs.test", Errs: selfstat.Register(
+		"write",
+		"errors",
+		map[string]string{"output": "test"},
+	)}
+	oLog.Error("another thing happened")
+
+	pLog := Logger{Name: "processors.test", Errs: selfstat.Register(
+		"process",
+		"errors",
+		map[string]string{"processor": "test"},
+	)}
+	pLog.Error("another thing happened")
+
+	require.Equal(t, int64(2), iLog.Errs.Get())
+	require.Equal(t, int64(1), aLog.Errs.Get())
+	require.Equal(t, int64(1), oLog.Errs.Get())
+	require.Equal(t, int64(1), pLog.Errs.Get())
+}
+
+func TestLogging(t *testing.T) {
+	log := Logger{Name: "inputs.test", Errs: selfstat.Register(
+		"gather",
+		"errors",
+		map[string]string{"input": "test"},
+	)}
+
+	log.Errs.Set(0)
+
+	log.Debugf("something happened")
+	log.Debug("something happened")
+
+	log.Warnf("something happened")
+	log.Warn("something happened")
+	require.Equal(t, int64(0), log.Errs.Get())
+
+	log.Infof("something happened")
+	log.Info("something happened")
+	require.Equal(t, int64(0), log.Errs.Get())
+
+	log.Errorf("something happened")
+	log.Error("something happened")
+	require.Equal(t, int64(2), log.Errs.Get())
+}