public class testcalendar {
    public string eventsform{set;get;}
    public datetime startdate{set;get;}
    public boolean displayevent{get;set;}
    public time selectedtime {set;get;}
    public String selecteddt {set;get;}
    public string selectdt{set;get;}
    public string stage{set;get;}
    public boolean manualtimeslot {set;get;}
    // public Activity__c activityObj {set;get;}
    public Boolean displaypopup{set;get;} 
    public Boolean displaypopup2{set;get;}
    public Boolean displayPopUp3{set;get;}
    public Boolean displayPopUp4{set;get;}
    public Boolean displayPopUp5{set;get;}
    public blob Attach{set;get;} 
    public Boolean includeMyEvents {get;set;}
    public list<calEvent> events {get;set;}
    
    String dtFormat = 'd MMM yyyy HH:mm:ss z';
    
    public testcalendar()
    {
        // activityObj = new Activity__c();
        includeMyEvents = true;
    } 
    /* public testcalendar(apexpages.StandardController Controller)
{

}*/
    //showing the popup window for create a event
    public void showPopup()
    {       
        displayPopup = true; 
        displaypopup2=true;
    }  
    public PageReference toggleMyEvents() {
        if(includeMyEvents){
            includeMyEvents = false;
        }
        else{
            includeMyEvents = true;
        }
        pageload();
        return null;
    }
    
    /*  public list<event> myevent {set;get;}
public pagereference Editevent()
{

Event v=[select id,StartDateTime,EndDateTime,Start_Date__c,mounika__Event_Status__c from Event where Start_Date__c=:selectdt];
if(v.mounika__Event_Status__c =='Pending')
{
system.debug('v'+v);
myevent.add(v);
pagereference r=new pagereference('/apex/pdfcalendar');
return r;
}
else{
ApexPages.addMessage(new ApexPages.message(ApexPages.severity.WARNING,'The cant be Edited anymore as it was confirmed'));
return null;
}

}*/
    public void submit()
    {
        
        string selectmanualtime = string.valueOf(selectedtime);
        string starttime = selectdt+' '+selectmanualtime;
        displaypopup=false;
        
        list<Activity__c> TotalRec = [select Id,stage__c,User__c,Start_Date__c,End_Date__c,Scheduled_Date__c from Activity__c  where Scheduled_Date__c =:selectdt];
        Activity__c activitiy =new Activity__c();
        //for((Activity__c.Start_Date__c) >= system.today())
        
        if(selectdt>=String.valueof(system.today()))
            
        {
            system.debug('selectdt'+selectdt);
            system.debug('Today'+ system.today());
            
            if(TotalRec.size() == 0 )
            {   
                if(stage == 'Pending')
                {
                    activitiy.Start_Date__c = Datetime.valueOf(starttime);
                    activitiy.End_Date__c = activitiy.Start_Date__c;
                    activitiy.stage__c = Stage;  
                    activitiy.mounika__Scheduled_Date__c=selectdt;
                    activitiy.User__c=UserInfo.getUserId();
                    insert activitiy;
                    
                    user u = [select id, name, contactid from user where id =: userinfo.getUserId()];
                    contact c = [select id, name, phone, email from contact where id =: u.ContactId];
                    Event Event =new Event();
                    Event.Subject='Email';
                    Event.Location='Hyderbad';
                    Event.OwnerId=UserInfo.getUserId();
                    Event.WhoId = u.ContactId;
                    Event.mounika__Start_Date__c=activitiy.mounika__Scheduled_Date__c;
                    Event.Event_Status__c= activitiy.stage__c ;
                    Event.StartDateTime=activitiy.Start_Date__c;
                    Event.EndDateTime=activitiy.End_Date__c;
                    system.debug('Event'+Event);
                    insert Event;
                    ApexPages.addMessage(new ApexPages.message(ApexPages.severity.CONFIRM,'Event created succesfully'));
                    Event ee =[select ID,Subject,WhoId,WhatId,OwnerId,StartDateTime,EndDateTime from Event limit 1];
                    StaticResource sr = [Select id,body, name from StaticResource where Name = 'Edoc' limit 1];
                     //Document d=[select id,Name,Body,AuthorId,FolderId,ContentType from document where name ='MyPersonalDocuments'];
                    document document=new document();
                    document.Name=sr.Name;
                    document.Body=sr.Body;
                   // system.debug('Event ID ='+ee.Id);
                    document.AuthorId ='00528000001McCz'; //sr.Id;//UserInfo.getUserId();
                   // document.AuthorId =d.AuthorId;
                   system.debug('document.AuthorId =='+sr.Id);
                    document.FolderId = '00528000001McCz';//UserInfo.getUserId(); // put it in running user's folder
                    //document.FolderId=d.FolderId;
                    system.debug('document.FolderId =='+sr.Id);
                    system.debug('document ='+document);
                    
                    insert document;
                    
                    
                    Attachment at= new attachment();
                    at.Name='event attachment';
                    at.ParentId=Event.id;
                    at.Body=document.body;
                    insert at;
                    
                    /*  List<Messaging.SingleEmailMessage> mails = new List<Messaging.SingleEmailMessage>();       
Messaging.EmailFileAttachment attach = new Messaging.EmailFileAttachment();
attach.setContentType('testcalendar/pdf');
attach.setFileName('pdfcalendar.pdf');        
blob body = at.Body;       
attach.Body = body;        
Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
mail.setToAddresses(new String[] {'mounika.kandala9@gmail.com'});
mail.setSubject('Event Attachment');
//messagebody='<html><body>' +Event.id+ <br></br>   'is </body></html>';
mail.setHtmlBody('Your Event ID:'+Event.id+'<br/>'+
'Start date and Time:'+Event.StartDateTime+'<br/> '+
'End Date and Time:'+Event.EndDateTime+'<br/> '+
'Stage:'+Event.mounika__Event_Status__c+'');
mail.setFileAttachments(new Messaging.EmailFileAttachment[] { attach });  
mails.add(mail);  
system.debug('mails ='+mails);
if(!mails.isEmpty()) 
{
//	Messaging.SendEmail(mails);
}*/
                    //ApexPages.addMessage(new ApexPages.message(ApexPages.severity.Confirm,'Event saved succesfully'));
                    displayPopUp5=true;
                }
                
                else{
                    //ApexPages.addMessage(new ApexPages.message(ApexPages.severity.Info,'Please select stage as  pending '));
                    displaypopup3=true;
                }
            }
            else
            {
                //ApexPages.addMessage(new ApexPages.message(ApexPages.severity.WARNING,'Event already exists'));
                displayPopUp4=true;
            }
        }
        
        else{
            displaypopup=false;
            displaypopup2=true;                
        }
        
        
    }
    public PageReference pageLoad() {
        
        events = new list<calEvent>();
        if(includeMyEvents)
        {
            
            for(Event Mypaln1 :[select Id,StartDateTime,EndDateTime, Subject, Location, WhoId, WhatId  from Event where Event_Status__c='Confirmed']){
                datetime startDT = Mypaln1.StartDateTime;            
                datetime endDT = Mypaln1.EndDateTime;
                calEvent MypalnEvent1 =new calEvent();  
                MypalnEvent1.title = 'Event:'+ Mypaln1.subject+ ' ';
                MypalnEvent1.allDay = true;
                MypalnEvent1.startString = startDT;
                MypalnEvent1.endString = endDT;
                MypalnEvent1.url = '/' + Mypaln1.Id;
                MypalnEvent1.className = 'event-Confirmed';
                events.add(MypalnEvent1);
                
            }
            
            for(Event Mypaln2 :[select Id,StartDateTime,EndDateTime, Subject, Location, WhoId, WhatId  from Event where Event_Status__c='pending']){
                datetime startDT = Mypaln2.StartDateTime;            
                datetime endDT = Mypaln2.EndDateTime;
                calEvent MypalnEvent2 =new calEvent();  
                MypalnEvent2.title = 'Event:'+ Mypaln2.subject+ ' ';
                MypalnEvent2.allDay = true;
                MypalnEvent2.startString = startDT;
                MypalnEvent2.endString = endDT;
                MypalnEvent2.url = '/' + Mypaln2.Id;
                MypalnEvent2.className = 'event-Pending';
                events.add(MypalnEvent2);
                
            }
            
        }
        return null;
    }
    
    public void Deleteevent(){
        string selectmanualtime = string.valueOf(selectedtime);
        string starttime = selectdt+' '+selectmanualtime;
        Event e=[select id,StartDateTime,EndDateTime,Start_Date__c from Event where Start_Date__c=:selectdt];
        Activity__c m=[select id,Start_Date__c,mounika__Scheduled_Date__c from Activity__c where mounika__Scheduled_Date__c =:selectdt];
        delete e;
        delete m;
        ApexPages.addMessage(new ApexPages.message(ApexPages.severity.Confirm,'Event Deleted succesfully'));
    }
    public void UpdateEvent()
    {
        Event e=[select id,StartDateTime,EndDateTime,Start_Date__c,mounika__Event_Status__c from Event where Start_Date__c=:selectdt];
        if(e.mounika__Event_Status__c== 'Pending')
        {
            if(stage == 'Confirmed'){
                e.mounika__Event_Status__c='Confirmed';
                update e;
                ApexPages.addMessage(new ApexPages.message(ApexPages.severity.Confirm,'Event saved succesfully'));
            }
            else{
                ApexPages.addMessage(new ApexPages.message(ApexPages.severity.Info,'Please select stage as confirmed to update'));
            }
        }
        else{
            ApexPages.addMessage(new ApexPages.message(ApexPages.severity.Info,'The stage cant be updated for already completed events'));  
        }
    }
    
    
    
    //Class to hold calendar event data
    public void GetEvents(){
        
    }
    public void cancelevent(){
        displaypopup=false;
        displaypopup2=false; 
        displaypopup3=false;
        displaypopup4=false; 
        displayPopUp5=false;
    }
    public void Rerendertop(){
        displaypopup=true;
        
    }
    public class calEvent{
        public String title {get;set;}
        public Boolean allDay {get;set;}
        public dateTime startString {get;set;}
        public dateTime endString {get;set;}
        public String url {get;set;}
        public String className {get;set;}     
    }
}

Test Class:



@isTest
public class testm {
    
    public static testmethod void test(){
        Id p = [select id from profile where name='Partner Community User'].id;
        
        Account ac = new Account(name ='Grazitti') ;
        insert ac; 
        
        Contact con = new Contact(LastName ='testCon',Email='tester@noemail.com',AccountId = ac.Id);
        insert con;  
        
        User user = new User(alias = 'test123', email='test123@noemail.com',
                             emailencodingkey='UTF-8', lastname='Testing', languagelocalekey='en_US',
                             localesidkey='en_US', profileid = p, country='United States',IsActive =true,
                             ContactId = con.Id,
                             timezonesidkey='America/Los_Angeles', username='tester@noemail.com');
        
        insert user;
        
        system.runAs(user) 
        {
            testcalendar TravelCalendar =new testcalendar(); 
            time t = system.now().time();
            TravelCalendar.selectedtime = t;// Time.newInstance(18, 30, 2, 20);
            TravelCalendar.selecteddt= String.valueof(system.today());//'7/07/2016';
            TravelCalendar.manualtimeslot=true;
            TravelCalendar.Attach=Null;
            TravelCalendar.eventsform='dsf';
            TravelCalendar.selectdt=String.valueof(Datetime.now());
            TravelCalendar.displayevent=true;
            TravelCalendar.startdate=system.now();
            TravelCalendar.displaypopup=true;
            TravelCalendar.displaypopup2=true;   
            TravelCalendar.includeMyEvents=true;
            TravelCalendar.stage='pending';
            TravelCalendar.displaypopup3=true;
            TravelCalendar.displaypopup4=true;
            TravelCalendar.displaypopup5=true;
            TravelCalendar.showPopup();
            TravelCalendar.toggleMyEvents();
            
            TravelCalendar.submit();
            //TravelCalendar.pageLoad();
            
            
            
            activity__c  activitiy1 =new activity__c();
            activitiy1.stage__c='Pending';        
            activitiy1.Start_Date__c= system.today();
            activitiy1.End_Date__c=system.now();
            activitiy1.User__c=user.id;
            insert activitiy1;
            system.debug('act'+activitiy1);
            
            Event e =new Event();
            //e.WhoId=Null;
            e.Event_Status__c='Pending';
            e.OwnerId=User.Id;
            e.StartDateTime=system.today();
            e.EndDateTime= system.now();
            e.Subject='call';
            insert e;
            
            Event OrderUpdate = [SELECT Id, Event_Status__c, StartDateTime FROM Event WHERE Id=:e.Id];
            OrderUpdate.Event_Status__c='Confirmed';
            update OrderUpdate;
            
            Document document;
            
            document = new Document();
            document.Body = Blob.valueOf('Some Text');
            document.IsPublic = true;
            document.Name = 'Edoc';
            document.FolderId = userinfo.getUserId();
            document.AuthorId=userinfo.getUserId();
            insert document;   
            
            Attachment at=new Attachment();
            at.Name='event attachment';
                    at.ParentId=e.id;
                    at.Body=document.body;
                    insert at;
            
           
            TravelCalendar.pageLoad();
            TravelCalendar.Deleteevent();
            TravelCalendar.UpdateEvent();
            TravelCalendar.GetEvents();
            TravelCalendar.cancelevent();
            TravelCalendar.Rerendertop();
           }
    }
}