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);
}
}
