🐛 SetLogger should work with nil sinks

Signed-off-by: Vince Prignano <vincepri@redhat.com>

Author: vincepri

pkg/log/deleg.go

@@ -188,6 +188,9 @@ func (l *delegatingLogSink) WithValues(tags ...interface{}) logr.LogSink {
 // provided, instead of the temporary initial one, if this method
 // has not been previously called.
 func (l *delegatingLogSink) Fulfill(actual logr.LogSink) {
+	if actual == nil {
+		actual = NullLogSink{}
+	}
 	if l.promise != nil {
 		l.promise.Fulfill(actual)
 	}

pkg/log/log_test.go

@@ -286,6 +286,14 @@ var _ = Describe("logging", func() {
 				logInfo{msg: "msg 2"},
 			))
 		})
+
+		It("should handle nil sinks", func() {
+			By("fulfilling once")
+			delegLog.Fulfill(logr.Discard().GetSink())
+			By("grabbing a sub-logger and logging")
+			l1 := logr.New(delegLog).WithName("nilsink").WithValues("newtag", "newvalue2")
+			l1.Info("test")
+		})
 	})
 
 	Describe("logger from context", func() {