Salesforce Platform Developer I Certification Guide

HttpCalloutMock

A second interface that can be used in Salesforce for testing web service callouts is the HttpCalloutMock interface. A class that implements this interface needs to implement the HttpResponse method (HttpRequest). Just like the access modifier, this must be a public class with the public method respond. You can use this interface for each other callout scenario between Salesforce and a web service (such as the SOAP and REST services):

global class MockResponse implements HttpCalloutMock {    global HTTPResponse respond(HTTPRequest req) {    // Create a fake response (HttpResponse class) with response values and return this response    }}

When we use this type of mock interface, we need to call the class in our test method this. The ...