Hi guys, I'm wondering of how I am going to write a Test Class for Apex Class and a Trigger. This is just a simple Class and a Trigger please see below exact codes I am using.

trigger LeadUpdateListener on Lead (after update) {

    for ( Lead updatedLead : Trigger.New ) {
        CalloutExternal.pipelineConnect(updatedLead.Id);
	}
    
}

public class CalloutExternal {

    @future(callout=true)
    
    public static void pipelineConnect (String id) {
        
        String token = 'xxxxxxxxx';
        
        HttpRequest request = new HttpRequest();
        String endpoint = 'https://xxx.xxxxxxx.com/trigger/'+ token + '/' + id;
        request.setEndpoint(endpoint);
        request.setMethod('GET');
               
        HttpResponse response = new HTTP().send(request);
        
        System.debug('xxxx Response...' + response);
    }

}

Hi guys, I'm wondering of how I am going to write a Test Class for Apex Class and a Trigger. This is just a simple Class and a Trigger please see below exact codes I am using.

trigger LeadUpdateListener on Lead (after update) {

    for ( Lead updatedLead : Trigger.New ) {
        CalloutExternal.pipelineConnect(updatedLead.Id);
	}
    
}

public class CalloutExternal {

    @future(callout=true)
    
    public static void pipelineConnect (String id) {
        
        String token = 'xxxxxxxxx';
        
        HttpRequest request = new HttpRequest();
        String endpoint = 'https://xxx.xxxxxxx.com/trigger/'+ token + '/' + id;
        request.setEndpoint(endpoint);
        request.setMethod('GET');
               
        HttpResponse response = new HTTP().send(request);
        
        System.debug('xxxx Response...' + response);
    }

}