Add unit tests for kzerolog

It's not realistic to explicitly verify anything but it is useful to
invoke the various log levels and visually inspect the output.

Signed-off-by: Tom Pantelis <[email protected]>

pkg/log/kzerolog/kzerolog_test.go

@@ -0,0 +1,67 @@
+/*
+SPDX-License-Identifier: Apache-2.0
+
+Copyright Contributors to the Submariner project.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package kzerolog_test
+
+import (
+	"errors"
+	"flag"
+	"testing"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+	"github.com/submariner-io/admiral/pkg/log"
+	"github.com/submariner-io/admiral/pkg/log/kzerolog"
+	logf "sigs.k8s.io/controller-runtime/pkg/log"
+)
+
+func TestZerolog(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Zerolog Suite")
+}
+
+func init() {
+	flags := flag.NewFlagSet("kzerolog", flag.ExitOnError)
+	kzerolog.AddFlags(flags)
+
+	_ = flags.Parse([]string{"-v=4"})
+
+	kzerolog.InitK8sLogging()
+}
+
+// We don't explicitly verify anything in this test. The purpose is to invoke the various log levels and visually inspect the output
+// for correctness.
+var _ = When("When zerolog is configured", func() {
+	It("should output in the desired format", func() {
+		logger := log.Logger{Logger: logf.Log.WithName("test")}
+
+		logger.Info("Info log with keys and values.", "key1", "value1", "key2", "value2")
+		logger.Infof("Infof log: arg: %s", "value")
+
+		logger.Warning("Warning log with keys and values.", "key1", "value1", "key2", "value2")
+		logger.Warningf("Warningf log: arg: %s", "value")
+
+		logger.Error(errors.New("mock error"), "Error log with keys and values.", "key1", "value1", "key2", "value2")
+		logger.Errorf(errors.New("mock error"), "Errorf log: arg: %s", "value")
+
+		logger.V(log.DEBUG).Info("Debug log")
+		logger.V(log.TRACE).Info("Trace log")
+
+		logger.Logger.Error(nil, "Fatal log", log.FatalKey, "true")
+	})
+})