Writing Unit Test for Apex Rest Class

Question

I'm trying to deploy my Apex class to my production environment. I was having difficulty writing and organizing my Tests. Here is the Apex Rest Class I created

 @RestResource(urlMapping='/convertlead/*')
 global class LeadConvert extends Auth.ConnectedAppPlugin{
 @HttpPost
global static string convertLead(string leadId, string accountId, string newUser, string email)
{
    Lead lead = [select Id from Lead where Id = :leadId];
    Database.LeadConvert lc = new Database.LeadConvert();
    LeadStatus convertStatus = [SELECT Id, MasterLabel FROM LeadStatus WHERE IsConverted=true LIMIT 1];
    lc.setLeadId(lead.Id);
    lc.setAccountId(accountId);
    if(newUser == 'true' || newUser =='True'){
        lc.setDoNotCreateOpportunity(false);
        lc.setOpportunityName(email);
    }
    else{
        lc.setDoNotCreateOpportunity(true);
    }
    lc.setConvertedStatus(convertStatus.MasterLabel);
    Database.LeadConvertResult lcr = Database.convertLead(lc);
    if (lcr.isSuccess())
    {
        return 'success';
    }
    else
    {
        return 'failed';
    }
}
  @isTest
  static void leadConvertClassTest(){
    LeadConvert lct = new LeadConvert();
    string LCResult = lct.convertLead("123", "123", "false", "[email protected]");
    System.assertEquals("failed", LCResult);

    }

}

I want to write a mock unit test that will just let me deploy to my production environment. It doesn't need to validate anything at this point. How can I do that?

I've created another apex Test Class with the following method, still getting 0% test coverage?

  @isTest
   private class LeadConverTest {

static testMethod void testconvertLead() {
    //LeadConvert lct = new LeadConvert();
    //string LCResult = convertLead("123", "123", "false", "[email protected]");
    string LCResult = LeadConvert.convertLead("123", "123", "false", "[email protected]");
    System.assertEquals("failed", LCResult);
}
 }

Answer 1

There's a lot you need to do here. Basically speaking, writing tests just to get the code coverage up is a Very Bad Idea.

That aside, your test is failing on the very first line, because you have failed to create a Lead to test with, and the Lead Id you are passing in is in an invalid format.

Before going any further, I would encourage you to read An Introduction to Apex Test Methods, Testing Best Practices and Understanding Testing in Apex to get a better idea of why these tests are valuable, because writing tests that don't test anything just to get code into production is asking for a world of hurt.