Update tests to run also on macOS

pkg/systemlogmonitor/logwatchers/filelog/log_watcher_darwin.go

@@ -0,0 +1,29 @@
+/*
+Copyright 2023 The Kubernetes Authors All rights reserved.
+
+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 filelog
+
+import (
+	"io"
+
+	"github.com/hpcloud/tail"
+)
+
+// getLogReader returns log reader for filelog log. Note that getLogReader doesn't look back
+// to the rolled out logs.
+func getLogReader(path string) (io.ReadCloser, error) {
+	return tail.OpenFile(path)
+}

pkg/systemlogmonitor/logwatchers/kmsg/log_watcher_darwin.go

@@ -0,0 +1,31 @@
+/*
+Copyright 2023 The Kubernetes Authors All rights reserved.
+
+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 kmsg
+
+import (
+	"runtime"
+
+	"github.com/golang/glog"
+
+	"k8s.io/node-problem-detector/pkg/systemlogmonitor/logwatchers/types"
+)
+
+// NewKmsgWatcher creates a watcher which will read messages from /dev/kmsg
+func NewKmsgWatcher(cfg types.WatcherConfig) types.LogWatcher {
+	glog.Fatalf("kmsg parser is not supported in %s", runtime.GOOS)
+	return nil
+}