include a test for the config changes

third_party/envoy-gateway/config_test.go

@@ -0,0 +1,44 @@
+/*
+Copyright 2024 The Knative 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 main
+
+import (
+	"os"
+	"testing"
+
+	corev1 "k8s.io/api/core/v1"
+	"sigs.k8s.io/yaml"
+
+	"knative.dev/net-gateway-api/pkg/reconciler/ingress/config"
+)
+
+func TestFromConfigMap(t *testing.T) {
+	bytes, err := os.ReadFile(config.GatewayConfigName + ".yaml")
+	if err != nil {
+		t.Fatalf("failed to read %q: %s", config.GatewayConfigName, err)
+	}
+
+	cm := &corev1.ConfigMap{}
+	err = yaml.Unmarshal(bytes, cm)
+	if err != nil {
+		t.Fatalf("failed to unmarshal %q: %s", config.GatewayConfigName, err)
+	}
+
+	if _, err := config.FromConfigMap(cm); err != nil {
+		t.Error("FromConfigMap(actual) =", err)
+	}
+}