external-dns/source/fqdn/fqdn_test.go

/*
Copyright 2025 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 fqdn

import (
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestParseTemplate(t *testing.T) {
	for _, tt := range []struct {
		name                     string
		annotationFilter         string
		fqdnTemplate             string
		combineFQDNAndAnnotation bool
		expectError              bool
	}{
		{
			name:         "invalid template",
			expectError:  true,
			fqdnTemplate: "{{.Name",
		},
		{
			name:        "valid empty template",
			expectError: false,
		},
		{
			name:         "valid template",
			expectError:  false,
			fqdnTemplate: "{{.Name}}-{{.Namespace}}.ext-dns.test.com",
		},
		{
			name:         "valid template",
			expectError:  false,
			fqdnTemplate: "{{.Name}}-{{.Namespace}}.ext-dns.test.com, {{.Name}}-{{.Namespace}}.ext-dna.test.com",
		},
		{
			name:                     "valid template",
			expectError:              false,
			fqdnTemplate:             "{{.Name}}-{{.Namespace}}.ext-dns.test.com, {{.Name}}-{{.Namespace}}.ext-dna.test.com",
			combineFQDNAndAnnotation: true,
		},
		{
			name:             "non-empty annotation filter label",
			expectError:      false,
			annotationFilter: "kubernetes.io/ingress.class=nginx",
		},
	} {
		t.Run(tt.name, func(t *testing.T) {
			_, err := ParseTemplate(tt.fqdnTemplate)
			if tt.expectError {
				assert.Error(t, err)
			} else {
				assert.NoError(t, err)
			}
		})
	}
}