Apex REST Callouts(2nd task)

Apex REST Callouts from (module - Apex Integration Services)

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SOURCE CODE: AnimalLocator

public class AnimalLocator {
 public static String getAnimalNameById (Integer id) {
        String AnimalName = '';
        Http http = new Http();
        HttpRequest request = new HttpRequest();
        request.setEndpoint('https://th-apex-http-callout.herokuapp.com/animals/'+id);
        request.setMethod('GET');
        HttpResponse response = http.send(request);
        if (response.getStatusCode() == 200) {
            Map<String,Object> results = (Map<String,Object>) JSON.deserializeUntyped(response.getBody());
            Map<String, Object> animal = (Map<String, Object>) results.get('animal');
            animalName = (String) animal.get('name');
        }
        return animalName;
    } }

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SOURCE CODE: AnimalLocatorTest

@isTest
private class AnimalLocatorTest {
@isTest static  void testGet() {
        Test.setMock(HttpCalloutMock.class, new AnimalLocatorMock());
        // Call method to test
        String result = AnimalLocator.getAnimalNameById (7);
        // Verify mock response is not null
        System.assertNotEquals(null,result,
                               'The callout returned a null response.');
        System.assertEquals('dog', result,
                            'The animal name should be \'dog\'');
    } }

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SOURCE CODE: AnimalLocatorMock

@isTest
global class AnimalLocatorMock implements HttpCalloutMock{

    // Implement this interface method
    global HTTPResponse respond(HTTPRequest request) {
        // Create a fake response
        HttpResponse response = new HttpResponse();
        response.setHeader('Content-Type', 'application/json');
        response.setBody('{"animal":{"id":7,"name":"dog","eats":"meat","says":"i am a lovely pet animal"}}');
        response.setStatusCode(200);
        return response;
    } }