test: add unit test for ServiceBatchUpdate

Signed-off-by: Shivansh Sahu <sahushivansh142@gmail.com>

Author: shivansh-gohem

pkg/controller/workload/bpfcache/service_test.go

@@ -0,0 +1,54 @@
+/*
+ * Copyright The Kmesh 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 bpfcache
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestServiceBatchUpdate(t *testing.T) {
+	// 1. Setup Fake BPF Map (Same helper as in endpoint_test.go)
+	workloadMap := NewFakeWorkloadMap(t)
+	defer CleanupFakeWorkloadMap(workloadMap)
+
+	c := NewCache(workloadMap)
+
+	// 2. Prepare Batch Data
+	keys := []ServiceKey{
+		{ServiceId: 100},
+		{ServiceId: 200},
+	}
+	values := []ServiceValue{
+		{LbPolicy: 1}, // Random
+		{LbPolicy: 1},
+	}
+
+	// 3. Call the function we need to cover
+	count, err := c.ServiceBatchUpdate(keys, values)
+
+	// 4. Assertions
+	assert.Nil(t, err)
+	assert.Equal(t, 2, count)
+
+	// 5. Verify data was actually written to the map
+	var lookupVal ServiceValue
+	err = c.ServiceLookup(&keys[0], &lookupVal)
+	assert.Nil(t, err)
+	assert.Equal(t, values[0].LbPolicy, lookupVal.LbPolicy)
+}