Hi All,

pls help me in code coverage 
This is my controller class
 

public with sharing class Solution{

    public Boolean displayPopup {get;set;}
    public List<Object__c> Records {get; set;} 
    public User username {get; set;} 
    public string userid {get; set;}
    public String searchTerm {get; set;}
    public String selecteduser {get; set;}
    public String uId {get; set;}
    public List<User> UserTemp = new List<User>();
    
    // To load data into the table
    public PACV_SolutionsTab_CC(ApexPages.StandardController controller) 
    {
        userid = Userinfo.getUserId();       
        Records =   [SELECT Name,some fields,Owner.name FROM Object__c WHERE CreatedById = :userid]; 
        system.debug(Records);
    } 
     
    
    // User Auto Complete related code
    public String getSearchTerm() 
    {
        return null;
    }
     // For auto complete functionality
    
        @RemoteAction
        public static List<User> searchuser(String searchTerm) {
       
       // System.debug('user Name is: '+searchTerm );
        List<User> user = Database.query('SELECT Name,Id FROM User where Name like \'%' + String.escapeSingleQuotes(searchTerm) + '%\' Limit 20');  
            system.debug('user'+user);
        return user;
    }
    // Assigns permission sets to the appropriate users
    // This is run as part of the setup wizard and after installations.       
            
      public  PageReference AssignPermissionSets()
        {
          PermissionSet ps = [SELECT ID From PermissionSet WHERE Name = 'Custom_Permissionset'];
          list <PermissionSetAssignment> PSAssignments = new list <PermissionSetAssignment>();
          List<User> users = [SELECT ID,(Select id,AssigneeId FROM PermissionSetAssignments WHERE PermissionSetID = :ps.Id) FROM User WHERE Profile.UserLicense.Name= 'Salesforce Platform' AND IsActive = true AND Id = :selecteduser];
            for( User u : users ){
                if(u.PermissionSetAssignments.size() == 0) 
                PSAssignments.add( new PermissionSetAssignment(AssigneeId = u.id,PermissionSetId = ps.ID ) );
                }
                insert PSAssignments;
              displayPopup = false;
                return null;
        }
    
    // To show popup and its functionality
    
    public void showPopup()
    {       
        displayPopup = true;    
    }
    
    public void closePopup() 
    {
        displayPopup = false;        
    }
    
}

This is my test class
 

@isTest
public class PACV_SolutionTabTest
{
public static testMethod void SolutionTabMethod() {
        
     
        Object__c o = new Object__c (Name='Test',Contact_Phone__c='0987654321',Supplier_Phone__c='1234567890');
        insert o;
       Profile p1 = [select id from Profile where name='Standard Platform User']; 

        User opUser = new user(alias = 'test123', email='test123@noemail.com',emailencodingkey='UTF-8', firstName='Pawan', lastname='Testing', 
                               languagelocalekey='en_US',localesidkey='en_US', profileid = p1.Id, country='United States',
                               timezonesidkey='America/Los_Angeles', username='test01@noemail.com'); 
            insert opUser;
            PermissionSet ps = [SELECT ID From PermissionSet WHERE Name = 'Custom_Permissionset'];
            insert new PermissionSetAssignment(AssigneeId = opUser.id, PermissionSetId = ps.Id );
        
            PageReference myPage = Page.Solution;
            myPage.getParameters().put('id', o.Id);  
            Test.setCurrentPage(myPage);    
            ApexPages.StandardController control = new ApexPages.Standardcontroller(o);
           Solution pageControl = new Solution(control); 
            pageControl.AssignPermissionSets();
            pageControl.showPopup();   
            pageControl.closePopup();
    }

}

Here i am not able to cover 43, 46 and 47 lines .
please help me