fqdn: add fuzzer

Signed-off-by: AdamKorcz <adam@adalogics.com>

pkg/fqdn/fuzz_test.go

@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright Authors of Cilium
+
+package fqdn
+
+import (
+	"testing"
+
+	fuzz "github.com/AdaLogics/go-fuzz-headers"
+
+	"github.com/cilium/cilium/pkg/policy/api"
+)
+
+func FuzzMapSelectorsToIPsLocked(f *testing.F) {
+	f.Fuzz(func(t *testing.T, data []byte) {
+		ff := fuzz.NewConsumer(data)
+		fqdnSelectors := make(map[api.FQDNSelector]struct{})
+		ff.FuzzMap(&fqdnSelectors)
+		if len(fqdnSelectors) == 0 {
+			t.Skip()
+		}
+		nameManager := NewNameManager(Config{
+			MinTTL: 1,
+			Cache:  NewDNSCache(0),
+		})
+		_, _ = nameManager.MapSelectorsToIPsLocked(fqdnSelectors)
+	})
+}