rdns_test.go

/*
 * ZAnnotate Copyright 2025 Regents of the University of Michigan
 *
 * 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 zannotate

import (
	"net"
	"reflect"
	"testing"
)

func TestRDNSAnnotate(t *testing.T) {
	tests := []struct {
		testName         string // name of the subtest
		ip               net.IP // input IP address
		expectedResponse *RDNSOutput
	}{
		{
			testName: "Positive Test Case",
			ip:       net.ParseIP("1.1.1.1"),
			expectedResponse: &RDNSOutput{
				DomainNames: []string{"one.one.one.one"},
			},
		}, {
			testName:         "Negative Test Case",
			ip:               net.ParseIP("127.0.0.1"),
			expectedResponse: &RDNSOutput{},
		}, {
			testName: "IPv6 Test Case",
			ip:       net.ParseIP("2001:4860:4860::8888"),
			expectedResponse: &RDNSOutput{
				DomainNames: []string{"dns.google"},
			},
		},
	}
	for _, tt := range tests {
		t.Run(tt.testName, func(t *testing.T) {
			var factory RDNSAnnotatorFactory
			err := factory.Initialize(nil)
			if err != nil {
				t.Fatalf("failed to initialize RDNS annotator factory: %v", err)
			}
			annotator := factory.MakeAnnotator(0)
			err = annotator.Initialize()
			if err != nil {
				t.Fatalf("failed to initialize RDNS annotator: %v", err)
			}
			rawResult := annotator.Annotate(tt.ip)
			if rawResult == nil && tt.expectedResponse != nil {
				t.Errorf("RDNS annotator returned a nil result, expected %v", tt.expectedResponse)
			}
			if !reflect.DeepEqual(rawResult, tt.expectedResponse) {
				t.Errorf("expected domain names %v, got %v", tt.expectedResponse, rawResult)
			}
		})
	}
}