Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

testutil/log.go

@@ -0,0 +1,75 @@
+package testutil
+
+import (
+	"log"
+
+	"github.com/influxdata/telegraf"
+)
+
+var _ telegraf.Logger = &Logger{}
+
+type Logger struct {
+	Name  string // Name is the plugin name, will be printed in the `[]`.
+	Quiet bool
+}
+
+// We always want to output at debug level during testing to find issues easier
+func (Logger) Level() telegraf.LogLevel {
+	return telegraf.Debug
+}
+
+// Adding attributes is not supported by the test-logger
+func (Logger) AddAttribute(string, interface{}) {}
+
+func (l Logger) Errorf(format string, args ...interface{}) {
+	log.Printf("E! ["+l.Name+"] "+format, args...)
+}
+
+func (l Logger) Error(args ...interface{}) {
+	log.Print(append([]interface{}{"E! [" + l.Name + "] "}, args...)...)
+}
+
+func (l Logger) Warnf(format string, args ...interface{}) {
+	log.Printf("W! ["+l.Name+"] "+format, args...)
+}
+
+func (l Logger) Warn(args ...interface{}) {
+	log.Print(append([]interface{}{"W! [" + l.Name + "] "}, args...)...)
+}
+
+func (l Logger) Infof(format string, args ...interface{}) {
+	if !l.Quiet {
+		log.Printf("I! ["+l.Name+"] "+format, args...)
+	}
+}
+
+func (l Logger) Info(args ...interface{}) {
+	if !l.Quiet {
+		log.Print(append([]interface{}{"I! [" + l.Name + "] "}, args...)...)
+	}
+}
+
+func (l Logger) Debugf(format string, args ...interface{}) {
+	if !l.Quiet {
+		log.Printf("D! ["+l.Name+"] "+format, args...)
+	}
+}
+
+func (l Logger) Debug(args ...interface{}) {
+	if !l.Quiet {
+		log.Print(append([]interface{}{"D! [" + l.Name + "] "}, args...)...)
+	}
+}
+
+func (l Logger) Tracef(format string, args ...interface{}) {
+	if !l.Quiet {
+		log.Printf("T! ["+l.Name+"] "+format, args...)
+	}
+}
+
+// Trace logs a trace message, patterned after log.Print.
+func (l Logger) Trace(args ...interface{}) {
+	if !l.Quiet {
+		log.Print(append([]interface{}{"T! [" + l.Name + "] "}, args...)...)
+	}
+}