How to increase code coverage for apex class that contains only web callouts

Question

I have an apex class which contains code only for web callouts and for this class I get coverage equivalent to 9% since actual web callouts are not a part of tests. So how am I supposed to increase code coverage for this class? I am not sure whether this % will allow the code to be deployed on PROD from Sandbox.

Basically I need to move 2 classes and 1 trigger to PROD with coverage as:

• Trigger - 89%
• Class 1 - 67%
• Class 2 (with Web callouts) - 9%

Answer 1

Use apex mocks to achieve the goal. Apex mock is used to get a response from the callout you need. So when you are doing a callout

HttpRequest req = new HttpRequest();
req.setEndpoint('http://example.com/example/test');
req.setMethod('GET');
Http h = new Http();
HttpResponse res = h.send(req);

the last line will basically return the result you want. To increase code coverage for method with if/else conditions you just need to create few mocks as inner classes which will return the result needed to get into this condition blocks. Salesforce have great guide for that.