How to pull opportunity owner name in test class

I wrote a batch class to send email to opps owner when opportunity'c close date passed.

global class SendEmailToopsowner implements Database.Batchable<sObject>  {
    global Database.QueryLocator start(Database.BatchableContext BC){
        return Database.getQueryLocator([SELECT Id, Name, StageName, CloseDate, Owner.name, Owner.Email FROM Opportunity WHERE CloseDate < TODAY  and (StageName != 'closed-Won' or StageName != 'closed-Lost' or StageName != 'In-Production')  ]);
    }
    global void execute(Database.BatchableContext BC, List<opportunity> scope){
            map<string,list<opportunity>> userEmailTasklistmap = new map<string,list<opportunity>>();
            for(opportunity opp : scope){
            if(!userEmailTasklistmap.Containskey(opp.owner.email)){
                userEmailTasklistmap.put(opp.owner.email, new list<opportunity>());
            }
            userEmailTasklistmap.get(opp.owner.email).add(opp);
          }  
        List<Messaging.SingleEmailMessage> mails = new List<Messaging.SingleEmailMessage>();
            for(string email : userEmailTasklistmap.keyset()){
                Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
                list<string> toAddresses = new list<string>();
                toAddresses.add(email);
                mail.setToAddresses(toAddresses);
                mail.setSubject('Opportunity close date passed');                
                String username = userEmailTasklistmap.get(email)[0].owner.name;
                String htmlBody = '';
                htmlBody = '<table width="100%" border="0" cellspacing="0" cellpadding="8" align="center" bgcolor="⌗F7F7F7">'+
                            +'<tr>'+
                              +'<td style="font-size: 14px; font-weight: normal; font-family:Calibri;line-height: 18px; color: ⌗333;"><br />'+
                                   +'<br />'+
                                    +'Dear '+username+',</td>'+
                            +'</tr>'+
                            +'<tr>'+
                                +'<td style="font-size: 14px; font-weight: normal; font-family:Calibri; line-height: 18px; color: ⌗333;"> Below are the list of opportunities under your name and the close dates have to be reviewed.Could you please advise new close date and insert your comments in the remarks section. </td>'+
                            +'</tr>'+
                        +'</table>';
                htmlBody +=  '<table border="1" style="border-collapse: collapse"><tr><th>Clickhere</th><th>Name</th><th>StageName</th><th>CloseDate</th><th>Remark</th><th>Expected Close Date</th></tr>';
                for(opportunity opp : userEmailTasklistmap.get(email)){
                    String CloseDate = '';
                    if (opp.CloseDate != null)
                        CloseDate = opp.CloseDate.format();                    
                    else
                        CloseDate = '';
                    String Name = opp.Name;
                    datetime dt = opp.CloseDate;
                    string ClosedDate = dt.format('M/d/yyyy');
                    string StageName = opp.StageName;
                    string View = URL.getSalesforceBaseUrl().toExternalForm()+'/'+ opp.id;
                    //string clickhere = view;
                    string Remark = '';
                    string Expectedclosedate = '';                    
                    htmlBody += '<tr><td>' + View +'</td><td>' + Name + '</td><td>' + StageName + '</td><td>' + CloseDate + '</td><td>' + Remark + '</td><td>' + Expectedclosedate + '</td></tr>';                    
                }
                 htmlBody += '</table><br>';
                 mail.sethtmlBody(htmlBody);
                 mails.add(mail);                    
            }
             if(mails.size()>0)
             Messaging.sendEmail(mails);
    }
    global void finish(Database.BatchableContext BC){        
    }
}

Then I tried to wrire Test class but not able to pull opportunity owner name and email  in test class. below is my test class

@isTest(seeAllData = true) 
public class SendEmailToopsownerTest  { 
static testMethod void testMethod1(){ 
        Profile pro = [SELECT Id FROM Profile WHERE Name='!Sales'];  
        User usr = new User( Alias = 'standt', Email='standarduser@tt.com',  
        EmailEncodingKey='UTF-8', LastName='Testing1', LanguageLocaleKey='en_US',  
        LocaleSidKey='en_US', ProfileId = pro.Id,  
        TimeZoneSidKey='America/Los_Angeles', UserName='standarduser@tt.com'); 
        System.runAs(usr) { 
            Account acc = new Account(); 
                acc.Name = 'Test Account'; 
                insert acc; 
                acc=[SELECT id,Name FROM account WHERE id=:acc.Id]; 
                System.assertEquals(acc.Name,'Test Account'); 
            Opportunity opp = new Opportunity(); 
                opp.AccountId = acc.Id;  
                opp.Name = 'Testing'; 
                opp.StageName = 'Prospecting'; 
                opp.CloseDate = System.Today(); 
                opp.Owner.name = 'Testing1';
                opp.Owner.Email = 'standarduser@tt.com';				
                insert opp ; 
                opp=[SELECT id,Name,StageName,CloseDate,Owner.name,Owner.Email FROM Opportunity WHERE id=:opp.Id]; 
                System.assertEquals(opp.StageName ,'Prospecting'); 
             }
             Test.StartTest(); 
                Database.executeBatch (new SendEmailToopsownerTest (),200); 
            Test.StopTest(); 
    } 
 }