Hi,

I am new to apex coding i want to know how i shd write test class for the following code so that it will give max coverage. 

public class ExtensionOpenActivities{
   
    ApexPages.StandardController stdController;
    public final List<Task> tasks {get; set;}
    public final List<Event> events {get; set;}
    private final Opportunity currentOpportunity;
   
    public String someString {get; set;}       
    public ExtensionOpenActivities(ApexPages.StandardController controller ) {
      
        this.stdController = controller;
        Opportunity currentOpportunity =  (Opportunity)stdController.getRecord();
        this.tasks = new List<Task>();
        this.events = new List<Event>();
                  
             
       
       List<Member_Value_Plan__c> mvpList = [Select id from Member_Value_Plan__c mvp WHERE mvp.Opportunity__r.id = :currentOpportunity.id ];
               
       for(Member_Value_Plan__c mvpObj: mvpList)
        {
           
            List<Task> mvpTasks = [SELECT Id, Subject, ActivityDate, Description, Status, Priority, Type, OwnerId, Owner.Name, CreatedById, CreatedBy.Name FROM Task WHERE WhatID =:mvpObj.id ];
            if(!mvpTasks.isEmpty())
            {
                tasks.addAll(mvpTasks);
            }    
           
            List<Event> mvpEvents = [SELECT Id, EndDateTime, OwnerId, Subject FROM Event WHERE WhatID =:mvpObj.id ];
            if(!mvpEvents.isEmpty())
            {
                events.addAll(mvpEvents);
            }
           
        }
       
       
      }
}