Test methods for schedular which call the method of external end point

Question

I am new to apex and have some questions.

Below are my conditions.

I have class A_Class in which it calls the external end point in some methods.

To test this class, I have already written HTTP mock class and succesfully tested.

I have a schedular class, which calls A_Class to start to run its main method.

I want to test that schedular class.

But when I directly run the schedular with test class, it hits exception because of [TestMethod do not support Web service callouts].

I successfully tested A_Class with HTTP mock class, now I only want to test my schedular whether it is running at sepcific time correctly.

Do I need to comment out the calling of A_Class from schedular when I run test class? If I comment it out, just afraid it gives me problem when I deploy to Production.

How should I approach that kind of situation?

Thanks ahead. Any hints or ideas will be so useful for me.

---Updated (after test)---

(main call method)
Map<String,Object> result = new Map<String,Object>();

        if(Test.isrunningtest())
        {
            // Set mock callout class
            Test.setMock(HttpCalloutMock.class, new Test_Class_Mock_Job_RSS());      
        }

        HTTPResponse res = callOutRssJobFeeds(url);
        result = getJobRSS(res); 

public HTTPResponse callOutRssJobFeeds(String url)
    {
        HttpRequest req = new HttpRequest();
        req.setMethod('GET');
        req.setEndpoint(url);

        Http http = new Http();
        HTTPResponse res = http.send(req);
        return res;
    }

Now I am getting [System.CalloutException: You have uncommitted work pending. Please commit or rollback before calling out] after updated like above and run the test class.

Answer 1

Either set up the scheduler class to ignore the function call while testing (via if(Test.isrunningtest()) { return; }, or set up the mock callout, as you did for the other. You may want to just encapsulate the mock callout function in a utility class that contains test methods for testing your code.