Apex Integration Services "Apex REST Callouts"

Create an Apex class that calls a REST endpoint and write a test class.

To pass this challenge, create an Apex class that calls a REST endpoint to return the name of an animal, write unit tests that achieve 100% code coverage for the class using a mock response, and run your Apex tests.

• The Apex class must be called 'AnimalLocator', have a 'getAnimalNameById' method that accepts an Integer and returns a String.
• The 'getAnimalNameById' method must call https://th-apex-http-callout.herokuapp.com/animals/:id, using the ID passed into the method. The method returns the value of the 'name' property (i.e., the animal name).
• Create a test class named AnimalLocatorTest that uses a mock class called AnimalLocatorMock to mock the callout response.
• The unit tests must cover all lines of code included in the AnimalLocator class, resulting in 100% code coverage.
• Run your test class at least once (via 'Run All' tests the Developer Console) before attempting to verify this challenge.

AnimalLocator Class with getAnimalNameById method:

public class AnimalLocator

{

  public static String getAnimalNameById(Integer id){

        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);

          String strResp = '';

           system.debug('******response '+response.getStatusCode());

           system.debug('******response '+response.getBody());

        // If the request is successful, parse the JSON response.

        if (response.getStatusCode() == 200) 

        {

            // Deserializes the JSON string into collections of primitive data types.

           Map<String, Object> results = (Map<String, Object>) JSON.deserializeUntyped(response.getBody());

            // Cast the values in the 'animals' key as a list

           Map<string,object> animals = (map<string,object>) results.get('animal');

            System.debug('Received the following animals:' + animals );

            strResp = string.valueof(animals.get('name'));

            System.debug('strResp >>>>>>' + strResp );

        }

        return strResp ;

   }

  

}

Mock Callout Response : AnimalLocatorMock

@isTest

global class AnimalLocatorMock implements HttpCalloutMock {

    global HTTPResponse respond(HTTPRequest request) {

        HttpResponse response = new HttpResponse ();

        response.setHeader('Content-Type', 'application/json');

        response.setBody('{"animal":{"id":1,"name":"chicken","eats":"chiken food","says":"cluck cluck"}}');

        response.setStatusCode(200);

        return response;

    }

}

AnimalLocatorTest Class:

@isTest

private class AnimalLocatorTest {

    @isTest static void AnimalLocatorMock1(){

        Test.setMock(HttpCalloutMock.class, new AnimalLocatorMock());

        string result = AnimalLocator.getAnimalNameById(1);

        string expectedResult = 'chicken';

        System.assertEquals(result, expectedResult);

    }

}