Added tests for federatedhpa controller

Signed-off-by: Anuj Agrawal <anujagrawal380@gmail.com>

Added tests for federatedhpa controller

Signed-off-by: Anuj Agrawal <anujagrawal380@gmail.com>

pkg/controllers/federatedhpa/config/types_test.go

@@ -0,0 +1,59 @@
+/*
+Copyright 2024 The Kubernetes Authors.
+
+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 config
+
+import (
+	"testing"
+
+	"github.com/spf13/pflag"
+)
+
+// TestHPAControllerConfiguration_AddFlags tests that AddFlags adds all expected flags
+func TestHPAControllerConfiguration_AddFlags(t *testing.T) {
+	config := &HPAControllerConfiguration{}
+	fs := pflag.NewFlagSet("test", pflag.ContinueOnError)
+
+	config.AddFlags(fs)
+
+	expectedFlags := []string{
+		"horizontal-pod-autoscaler-sync-period",
+		"horizontal-pod-autoscaler-upscale-delay",
+		"horizontal-pod-autoscaler-downscale-stabilization",
+		"horizontal-pod-autoscaler-downscale-delay",
+		"horizontal-pod-autoscaler-tolerance",
+		"horizontal-pod-autoscaler-cpu-initialization-period",
+		"horizontal-pod-autoscaler-initial-readiness-delay",
+	}
+
+	for _, flagName := range expectedFlags {
+		if fs.Lookup(flagName) == nil {
+			t.Errorf("Expected flag %s not found", flagName)
+		}
+	}
+}
+
+// TestHPAControllerConfiguration_AddFlags_NilReceiver tests AddFlags with a nil receiver
+func TestHPAControllerConfiguration_AddFlags_NilReceiver(t *testing.T) {
+	var config *HPAControllerConfiguration
+	fs := pflag.NewFlagSet("test", pflag.ContinueOnError)
+
+	config.AddFlags(fs)
+
+	if fs.HasFlags() {
+		t.Error("Expected no flags to be added when receiver is nil, but flags were added")
+	}
+}