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Frank CarterFrank Carter 

problem with test class for search page

hi, I'm hoping someone can point me in the right direction.
I have a vf page to search child object related to Opportunity.
In input user have to insert two string Inputtext (owner and id opportunity).
In apex class there is a void method load data:
Apex class: 
public class SearchWithWrapperSS {
    
    public  Date StartDate {get;set;}
    public  Date EndDate {get;set;}
    public String inputValue1 {get;set;}
    public String inputValue2 {get;set;} 
    public List<WrapperClass> listBD {get;set;}
    
    public List<Billing_Detail__c> blst=new List<Billing_Detail__c>();
    
    
    public void loadData() {
        if ((! String.isBlank(inputValue1))&&(String.isBlank(inputValue2))){
            String Owner;
            
            List <User> userList = [Select id, Name from User where Email =: inputValue1];
            if(! userList.isEmpty()){ 
             Owner = userList[0].id; 
            
            
            
            List <Billing_Detail__c> billingList = [Select Id,Account_Name__c,SF_Opportunity_Id__c, Name,Billing_Type__c, 
                                                    Billing_Period__c , Monthly_Forecast__c,Billing_Competence_Forecast__c,End_of_Billing__c, Amount__c, Billing_Status__c 
                                                    from Billing_Detail__c 
                                                    Where Billing_Detail__c IN (select id from Opportunity where OwnerId=:Owner)and 
                                                    Monthly_Forecast__c>=:StartDate AND Monthly_Forecast__c <= :EndDate and Billing_Status__c !='Billed' 
                                                    Order by Monthly_Forecast__c ];
            
            
            listBD = new List<WrapperClass>();
            for(Billing_Detail__c  cr : billingList ){
                listBD.add(new WrapperClass (cr, false));
            }
            
            }
            
        }
        
        else if ((! String.isBlank(inputValue1))&&(! String.isBlank(inputValue2))){
            String Owner;
            List <User> userList = [Select id, Name from User where Email =: inputValue1];
          if(! userList.isEmpty()){ 
             Owner = userList[0].id; 
            
            List <Billing_Detail__c> listBilling = [Select Id,Account_Name__c,SF_Opportunity_Id__c, Name,Billing_Type__c, Billing_Period__c , Monthly_Forecast__c,Billing_Competence_Forecast__c,End_of_Billing__c, Amount__c, Billing_Status__c 
                                                    from Billing_Detail__c Where Billing_Detail__c IN (select id from Opportunity where OwnerId=:Owner)
                                                    and Monthly_Forecast__c>=:StartDate AND Monthly_Forecast__c <= :EndDate and SF_Opportunity_Id__c=:inputValue2 and Billing_Status__c !='Billed' Order by Monthly_Forecast__c ];
            
            listBD = new List<WrapperClass>();
            for(Billing_Detail__c  cr : listBilling){
                listBD.add(new WrapperClass (cr, false));
                
            }
        }
        }
        
        else if (! String.isBlank(inputValue2)){
            listBD = new List<WrapperClass>();

            for(Billing_Detail__c  cr : [Select Id,Account_Name__c,SF_Opportunity_Id__c, Name,Billing_Type__c, Billing_Period__c , Monthly_Forecast__c,Billing_Competence_Forecast__c,End_of_Billing__c, Amount__c, Billing_Status__c   from Billing_Detail__c Where Monthly_Forecast__c>=:StartDate AND Monthly_Forecast__c <= :EndDate and SF_Opportunity_Id__c=:inputValue2 and Billing_Status__c !='Billed' Order by Monthly_Forecast__c ]){
                listBD.add(new WrapperClass (cr, false));
            }
        }
        else{
            listBD = new List<WrapperClass>();
            for(Billing_Detail__c  cr : [Select Id,Account_Name__c,SF_Opportunity_Id__c, Name,Billing_Type__c, Billing_Period__c , Monthly_Forecast__c,Billing_Competence_Forecast__c,End_of_Billing__c, Amount__c, Billing_Status__c   from Billing_Detail__c Where Monthly_Forecast__c>=:StartDate AND Monthly_Forecast__c <= :EndDate and Billing_Status__c !='Billed'  Order by Monthly_Forecast__c ]){
                listBD.add(new WrapperClass (cr, false));
                
            }
        }
        
    }  
    public List<WrapperClass> getBilling() {
        if(listBD == null) {
            
            listBD = new List<WrapperClass>(); 
            for(Billing_Detail__c  cr : [Select Id,Account_Name__c,SF_Opportunity_Id__c, Name,Billing_Type__c, Billing_Period__c , Monthly_Forecast__c,Billing_Competence_Forecast__c,End_of_Billing__c, Amount__c, Billing_Status__c   from Billing_Detail__c Where Monthly_Forecast__c>=:StartDate AND Monthly_Forecast__c <= :EndDate and Billing_Status__c !='Billed' Order by Monthly_Forecast__c ]){
                listBD.add(new WrapperClass (cr, false));
            }
        }   
        return listBD;
    }
    
    
    
    
    
    public PageReference changeStatus() {
        
        List<Billing_Detail__c> selectedBD = new List<Billing_Detail__c>();
        for(WrapperClass bd: getBilling()){
            
            Billing_Detail__c billlingDetail ;
            if(bd.check_box== true){
                
                billlingDetail = new Billing_Detail__c(Id=bd.cs.Id);
                billlingDetail.Billing_Status__c= 'Authorized for Billing';
                
                
                selectedBD.add(billlingDetail);
                
            } 
        }
        
        update selectedBD;
        loadData();
        
        
        
        return null;
    }   
    public PageReference processSelected() {
        
        List<Billing_Detail__c> selectedBD = new List<Billing_Detail__c>();
        for(WrapperClass bd: getBilling()){
            
            Billing_Detail__c billlingDetail ;
            if(bd.check_box== true){
                
                billlingDetail = new Billing_Detail__c(Id=bd.cs.Id);
                if (bd.cs.Monthly_Forecast__c.month()==12)
                {
                    billlingDetail.Monthly_Forecast__c = Date.newinstance(  bd.cs.Monthly_Forecast__c.year()+1 , 01 ,  bd.cs.Monthly_Forecast__c.day() );
                    
                    billlingDetail.Billing_Competence_Forecast__c  = billlingDetail.Monthly_Forecast__c;
                    selectedBD.add(billlingDetail);
                }
                
                
                else{
                    
                    billlingDetail.Monthly_Forecast__c = Date.newinstance(  bd.cs.Monthly_Forecast__c.year() , bd.cs.Monthly_Forecast__c.month()+1,  bd.cs.Monthly_Forecast__c.day() );
                    
                    
                    billlingDetail.Billing_Competence_Forecast__c  = billlingDetail.Monthly_Forecast__c;
                    selectedBD.add(billlingDetail);
                }   
                
            } 
        }
        
        
        update selectedBD;
        loadData();
        
        return null;       
    }
    
    
    
    //save
    public PageReference toSave() {
        List<Billing_Detail__c> selectedBD = new List<Billing_Detail__c>();
        for(WrapperClass bd: getBilling()){
            
            Billing_Detail__c billlingDetail ;
            
            
            billlingDetail = new Billing_Detail__c(Id=bd.cs.Id,Amount__c=bd.cs.Amount__c, Billing_Type__c=bd.cs.Billing_Type__c,Billing_Competence_Forecast__c=bd.cs.Billing_Competence_Forecast__c, Billing_Period__c=bd.cs.Billing_Period__c, Billing_Status__c=bd.cs.Billing_Status__c, Monthly_Forecast__c=bd.cs.Monthly_Forecast__c,End_of_Billing__c=bd.cs.End_of_Billing__c );               
            
            selectedBD.add(billlingDetail);      
        }
        
        update selectedBD;
        loadData();
        
        return null;
    }
    

    public PageReference toDelete() {
        List<Billing_Detail__c> selectedBD = new List<Billing_Detail__c>();
        for(WrapperClass bd: getBilling()){
            
            Billing_Detail__c billlingDetail ;
            if(bd.check_box== true){
                
                billlingDetail = new Billing_Detail__c(Id=bd.cs.Id);               
                
                selectedBD.add(billlingDetail);
                
            } 
        }
        
        delete selectedBD;
        loadData();
        
        return null;
    }
    

    
    public class WrapperClass {
        public Billing_Detail__c  cs {get; set;}
        public Boolean check_box {get; set;}
        
        public WrapperClass(Billing_Detail__c  c, Boolean check_box){
            this.cs = c;
            this.check_box = false;
        }
    }
}

the test class: 
@isTest private class SearchWithWrapperSSTest {
@isTest static void testController() {
    Test.startTest();
    Id RecordTypeIdAccount = Schema.SObjectType.Account.getRecordTypeInfosByDeveloperName().get('Customer_user').getRecordTypeId();//get only macrostructure RT		
    // create the object in input of the class 
        Account a= new Account();
        a.name='Account test t';
        //a.RecordTypeId='012w0000000iROM';
        a.Branch__c='Italy';
        a.Status__c='Customer';
        a.BillingCountry='Italy';
        a.Public_Administration_Account__c='No';
        insert a;

		Opportunity testOpportunity = new Opportunity(
		AccountID = a.Id,
		Name = 'Test Opportunity',
		StageName = 'Needs Analysis',
		CloseDate = date.today().addDays(15)       		
		);
		insert testOpportunity;
    
    
    
    Billing_Detail__c c= new Billing_Detail__c(); 
		c.Amount__c= 100;
		c.Billing_Type__c='FEE';
		c.Billing_Period__c='monthly';
		c.Billing_Status__c='Authorized for Billing'; 
		c.Product_Line__c='Interactive Experience (iX)'; 
		c.Product__c='Chat Delivery'; 
		c.Monthly_Forecast__c=Date.newInstance(2018, 7, 9); 
		c.End_of_Billing__c=Date.newInstance(2019, 7, 9); 
		c.Billing_Detail__c=testOpportunity.Id;

		insert c;
         
        User u = new user();
        u.LastName = 'Admin';
        u.Email = 'test1@test.com';
        u.Alias = 'Tcode';
        u.Username = 'test123@test.com.testClass';
        u.CommunityNickname = 'test121';
        u.LocaleSidKey = 'en_US';
        u.TimeZoneSidKey = 'GMT';
        u.ProfileId = [Select id, name from Profile where name = 'System Administrator' OR name = 'Amministratore del sistema'].id;
        u.LanguageLocaleKey = 'en_US';
        u.EmailEncodingKey = 'UTF-8';
        u.IsActive = true;
      
        insert u;
           
    	Date StartDate= Date.newInstance( 2018, 07,1);
    	Date EndDate= Date.newInstance(  2019,10,18 );
    	String inputValue1= 'test1@test.com';
    	String inputValue2= testOpportunity.SFDC_Opportunity_Id__c;

    
    list<WrapperClassTest> wrp= new  list<WrapperClassTest>();
   
    	ApexPages.StandardController sc = new ApexPages.StandardController(c);
SearchWithWrapperSS x =new  SearchWithWrapperSS();		
    	x.loadData();

    	x.listBD[0].check_box=true;
    for(WrapperClassTest wTest :wrp)
       
  {
   wTest.check_box=true;    
  }
    	
    	x.changeStatus();
    	x.processSelected(); 
    	x.toSave();
    	x.toDelete();
    
	
	
     Test.stopTest();
}
    Public class WrapperClassTest{
        public Billing_Detail__c  cs {get;set;}
        public Boolean check_box {get;set;}
        public WrapperClassTest(Billing_Detail__c  c, Boolean check_box)
        {
            this.cs = c;
            this.check_box = false;
        }
       public WrapperClassTest(Billing_Detail__c c) {
            this.cs = c;
            this.check_box = false;
        }
    }

}


The code coverage is 61% but i don't understand why it's like it doesn't see the content of the inputValue1 and inputValue2.
I'm hoping someone could have a look at my test class and let me know how I should go about passing these parameters.
any help would be appreciated 
Thanks
 
Frank CarterFrank Carter
User-added image
Ashish Singh SFDCAshish Singh SFDC
Hi Frank,

Can you try making SOQL query on  Opportunity afer its created and then use Opportunity Id in your inputvalue 2. Additionally put System.debug log for inputValue2 after x.loadData();.Then check the status in the log. My assumption here is, there is something wrong with inputValue2.

Thanks,
Ashish Singh.
Frank CarterFrank Carter
Hello Ashish,
thanks for answering.
the inpuvalue2 is an autonumber (SF-Opty-2668) in opportunity and is overturned on billing details with a process builder. So inputvalue1 is taken from opportunity  while inputvalue2 is take in billing details. I don't understand why it doesn't go into the second if. 

thanks
Frank
 
Maharajan CMaharajan C
Hi Frank,

You have to assign the values for the property inputValue1, inputValue2  in controller  before calling the loadData method from testclass .

Please consider the below changes in your test class:

String inputValue1= 'test1@test.com';  
String inputValue2= testOpportunity.SFDC_Opportunity_Id__c;    // use the soql here to get the auto number field value [select  SFDC_Opportunity_Id__c from Opportunity where  Id =:testOpportunity.Id  limit 1]

SearchWithWrapperSS x =new  SearchWithWrapperSS();   
x.inputValue1  = inputValue1;
x.inputValue2  = inputValue2;
x.loadData();

Similarly you have to pass the Startdate and Enddate to class.

Thanks,
Maharajan.C
Frank CarterFrank Carter
Goof morning,
I have modifed test class according to your specifications:
  
@isTest private class SearchWithWrapperSSTest {
@isTest static void testController() {
    Test.startTest();
    Id RecordTypeIdAccount = Schema.SObjectType.Account.getRecordTypeInfosByDeveloperName().get('Customer_user').getRecordTypeId();//get only macrostructure RT		
    // create the object in input of the class 
        Account a= new Account();
        a.name='Account test t';
        //a.RecordTypeId='012w0000000iROM';
        a.Branch__c='Italy';
        a.Status__c='Customer';
        a.BillingCountry='Italy';
        a.Public_Administration_Account__c='No';
        insert a;

		Opportunity testOpportunity = new Opportunity(
		AccountID = a.Id,
		Name = 'Test Opportunity',
		StageName = 'Needs Analysis',
		CloseDate = date.today().addDays(15)       		
		);
		insert testOpportunity;
    
    
    
    Billing_Detail__c c= new Billing_Detail__c(); 
		c.Amount__c= 100;
		c.Billing_Type__c='FEE';
		c.Billing_Period__c='monthly';
		c.Billing_Status__c='Authorized for Billing'; 
		c.Product_Line__c='Interactive Experience (iX)'; 
		c.Product__c='Chat Delivery'; 
		c.Monthly_Forecast__c=Date.newInstance(2018, 7, 9); 
		c.End_of_Billing__c=Date.newInstance(2019, 7, 9); 
		c.Billing_Detail__c=testOpportunity.Id;

		insert c;
         
        User u = new user();
        u.LastName = 'Admin';
        u.Email = 'test1@test.com';
        u.Alias = 'Tcode';
        u.Username = 'test123@test.com.testClass';
        u.CommunityNickname = 'test121';
        u.LocaleSidKey = 'en_US';
        u.TimeZoneSidKey = 'GMT';
        u.ProfileId = [Select id, name from Profile where name = 'System Administrator' OR name = 'Amministratore del sistema'].id;
        u.LanguageLocaleKey = 'en_US';
        u.EmailEncodingKey = 'UTF-8';
        u.IsActive = true;
      
        insert u;
           
    	Date StartDate= Date.newInstance( 2018, 07,1);
    	Date EndDate= Date.newInstance(  2019,10,18 );
    	String inputValue1= 'test1@test.com';
    	 List <Opportunity> opp = [select  SFDC_Opportunity_Id__c from Opportunity where  Id =:testOpportunity.Id  limit 1];
    	String inputValue2= opp[0].SFDC_Opportunity_Id__c;

    
    list<WrapperClassTest> wrp= new  list<WrapperClassTest>();
   
    	ApexPages.StandardController sc = new ApexPages.StandardController(c);
SearchWithWrapperSS x =new  SearchWithWrapperSS();		
    	
    x.inputValue1  = inputValue1;
	x.inputValue2  = inputValue2;
    x.StartDate = StartDate;
    x.EndDate = EndDate;
    x.loadData();

	System.debug('##> in1 ' +inputValue1 );
    System.debug('##> in2 ' +inputValue2 );
    
    	x.listBD[0].check_box=true;
    for(WrapperClassTest wTest :wrp)

  {
   wTest.check_box=true;    
  }
   	x.changeStatus();
   	x.processSelected(); 
    x.toSave();
    x.toDelete();

    
	
	
     Test.stopTest();
}
    Public class WrapperClassTest{
        public Billing_Detail__c  cs {get;set;}
        public Boolean check_box {get;set;}
        public WrapperClassTest(Billing_Detail__c  c, Boolean check_box)
        {
            this.cs = c;
            this.check_box = false;
        }
       public WrapperClassTest(Billing_Detail__c c) {
            this.cs = c;
            this.check_box = false;
        }
    }

}

Now it enters in the second if correctly but from line 51 of the apex class on out the code is note covered, others methods are note executed. Code coverage now is 19%. :(
Maharajan CMaharajan C
Hi Frank,

You have to write multi methods in test class also to enter if/else logics. 

Create one more method in test class and add the existing code you have used before my above comment wit out inputValue1, inputValue2, Startdate and EndDate like below.
SearchWithWrapperSS x =new  SearchWithWrapperSS();   
x.loadData();

So similarly you can write multiple methods to execute the loaddata with different data to meet the if else logics in Apex Class.

Thanks,
Maharajan.C
Frank CarterFrank Carter
Hello,
Thanks for answering me.I tried to inser other method but testController and testController and testController4 go in error: list index out of buonds:0 
@isTest private class SearchWithWrapperSSTest {
@isTest static void testController() {
    Test.startTest();
    Id RecordTypeIdAccount = Schema.SObjectType.Account.getRecordTypeInfosByDeveloperName().get('Customer_user').getRecordTypeId();//get only macrostructure RT		
    // create the object in input of the class 
        Account a= new Account();
        a.name='Account test t';
        //a.RecordTypeId='012w0000000iROM';
        a.Branch__c='Italy';
        a.Status__c='Customer';
        a.BillingCountry='Italy';
        a.Public_Administration_Account__c='No';
        insert a;

		Opportunity testOpportunity = new Opportunity(
		AccountID = a.Id,
		Name = 'Test Opportunity',
		StageName = 'Needs Analysis',
		CloseDate = date.today().addDays(15)       		
		);
		insert testOpportunity;
    
    
    
    Billing_Detail__c c= new Billing_Detail__c(); 
		c.Amount__c= 100;
		c.Billing_Type__c='FEE';
		c.Billing_Period__c='monthly';
		c.Billing_Status__c='Authorized for Billing'; 
		c.Product_Line__c='Interactive Experience (iX)'; 
		c.Product__c='Chat Delivery'; 
		c.Monthly_Forecast__c=Date.newInstance(2018, 7, 9); 
		c.End_of_Billing__c=Date.newInstance(2019, 7, 9); 
		c.Billing_Detail__c=testOpportunity.Id;

		insert c;
         
        User u = new user();
        u.LastName = 'Admin';
        u.Email = 'test1@test.com';
        u.Alias = 'Tcode';
        u.Username = 'test123@test.com.testClass';
        u.CommunityNickname = 'test121';
        u.LocaleSidKey = 'en_US';
        u.TimeZoneSidKey = 'GMT';
        u.ProfileId = [Select id, name from Profile where name = 'System Administrator' OR name = 'Amministratore del sistema'].id;
        u.LanguageLocaleKey = 'en_US';
        u.EmailEncodingKey = 'UTF-8';
        u.IsActive = true;
      
        insert u;
           
    	Date StartDate= Date.newInstance( 2018, 07,1);
    	Date EndDate= Date.newInstance(  2019,10,18 );
    	String inputValue1= 'test1@test.com';
    	 List <Opportunity> opp = [select  SFDC_Opportunity_Id__c from Opportunity where  Id =:testOpportunity.Id  limit 1];
    	String inputValue2= opp[0].SFDC_Opportunity_Id__c;

    
    list<WrapperClassTest> wrp= new  list<WrapperClassTest>();
   
    	ApexPages.StandardController sc = new ApexPages.StandardController(c);
SearchWithWrapperSS x =new  SearchWithWrapperSS();		
    	
    x.inputValue1  = inputValue1;
	x.inputValue2  = inputValue2;
    x.StartDate = StartDate;
    x.EndDate = EndDate;
    x.loadData();

	System.debug('##> in1 ' +inputValue1 );
    System.debug('##> in2 ' +inputValue2 );
    
    	x.listBD[0].check_box=true;
    for(WrapperClassTest wTest :wrp)
	
  {
   wTest.check_box=true;    
  }
    
   	x.changeStatus();
   	x.processSelected(); 
    x.toSave();
    x.toDelete();

    
	
	
     Test.stopTest();
}
    Public class WrapperClassTest{
        public Billing_Detail__c  cs {get;set;}
        public Boolean check_box {get;set;}
        public WrapperClassTest(Billing_Detail__c  c, Boolean check_box)
        {
            this.cs = c;
            this.check_box = false;
        }
       public WrapperClassTest(Billing_Detail__c c) {
            this.cs = c;
            this.check_box = false;
        }
    }
@isTest static void testController1() {
    Test.startTest();
    Id RecordTypeIdAccount = Schema.SObjectType.Account.getRecordTypeInfosByDeveloperName().get('Customer_user').getRecordTypeId();//get only macrostructure RT		
    // create the object in input of the class 
        Account a= new Account();
        a.name='Account test t';
        //a.RecordTypeId='012w0000000iROM';
        a.Branch__c='Italy';
        a.Status__c='Customer';
        a.BillingCountry='Italy';
        a.Public_Administration_Account__c='No';
        insert a;

		Opportunity testOpportunity = new Opportunity(
		AccountID = a.Id,
		Name = 'Test Opportunity',
		StageName = 'Needs Analysis',
		CloseDate = date.today().addDays(15)       		
		);
		insert testOpportunity;
    
    
    
    Billing_Detail__c c= new Billing_Detail__c(); 
		c.Amount__c= 100;
		c.Billing_Type__c='FEE';
		c.Billing_Period__c='monthly';
		c.Billing_Status__c='Authorized for Billing'; 
		c.Product_Line__c='Interactive Experience (iX)'; 
		c.Product__c='Chat Delivery'; 
		c.Monthly_Forecast__c=Date.newInstance(2018, 7, 9); 
		c.End_of_Billing__c=Date.newInstance(2019, 7, 9); 
		c.Billing_Detail__c=testOpportunity.Id;

		insert c;
         
        User u = new user();
        u.LastName = 'Admin';
        u.Email = 'test1@test.com';
        u.Alias = 'Tcode';
        u.Username = 'test123@test.com.testClass';
        u.CommunityNickname = 'test121';
        u.LocaleSidKey = 'en_US';
        u.TimeZoneSidKey = 'GMT';
        u.ProfileId = [Select id, name from Profile where name = 'System Administrator' OR name = 'Amministratore del sistema'].id;
        u.LanguageLocaleKey = 'en_US';
        u.EmailEncodingKey = 'UTF-8';
        u.IsActive = true;
      
        insert u;
           
    	Date StartDate= Date.newInstance( 2018, 07,1);
    	Date EndDate= Date.newInstance(  2019,10,18 );
    	String inputValue1= 'test1@test.com';
    	String inputValue2= testOpportunity.SFDC_Opportunity_Id__c;

    
    list<WrapperClassTest> wrp= new  list<WrapperClassTest>();
   
    	ApexPages.StandardController sc = new ApexPages.StandardController(c);
SearchWithWrapperSS x =new  SearchWithWrapperSS();		
    	x.loadData();

    	x.listBD[0].check_box=true;
    for(WrapperClassTest wTest :wrp)
       
  {
   wTest.check_box=true;    
  }
    	
    	x.changeStatus();
    	x.processSelected(); 
    	x.toSave();
    	x.toDelete();
    
	
	
     Test.stopTest();
}
    Public class WrapperClassTest1{
        public Billing_Detail__c  cs {get;set;}
        public Boolean check_box {get;set;}
        public WrapperClassTest1(Billing_Detail__c  c, Boolean check_box)
        {
            this.cs = c;
            this.check_box = false;
        }
       public WrapperClassTest1(Billing_Detail__c c) {
            this.cs = c;
            this.check_box = false;
        }
    }
@isTest static void testController3() {
    Test.startTest();
    Id RecordTypeIdAccount = Schema.SObjectType.Account.getRecordTypeInfosByDeveloperName().get('Customer_user').getRecordTypeId();//get only macrostructure RT		
    // create the object in input of the class 
        Account a= new Account();
        a.name='Account test t';
        //a.RecordTypeId='012w0000000iROM';
        a.Branch__c='Italy';
        a.Status__c='Customer';
        a.BillingCountry='Italy';
        a.Public_Administration_Account__c='No';
        insert a;

		Opportunity testOpportunity = new Opportunity(
		AccountID = a.Id,
		Name = 'Test Opportunity',
		StageName = 'Needs Analysis',
		CloseDate = date.today().addDays(15)       		
		);
		insert testOpportunity;
    
    
    
    Billing_Detail__c c= new Billing_Detail__c(); 
		c.Amount__c= 100;
		c.Billing_Type__c='FEE';
		c.Billing_Period__c='monthly';
		c.Billing_Status__c='Authorized for Billing'; 
		c.Product_Line__c='Interactive Experience (iX)'; 
		c.Product__c='Chat Delivery'; 
		c.Monthly_Forecast__c=Date.newInstance(2018, 7, 9); 
		c.End_of_Billing__c=Date.newInstance(2019, 7, 9); 
		c.Billing_Detail__c=testOpportunity.Id;

		insert c;
         
        User u = new user();
        u.LastName = 'Admin';
        u.Email = 'test1@test.com';
        u.Alias = 'Tcode';
        u.Username = 'test123@test.com.testClass';
        u.CommunityNickname = 'test121';
        u.LocaleSidKey = 'en_US';
        u.TimeZoneSidKey = 'GMT';
        u.ProfileId = [Select id, name from Profile where name = 'System Administrator' OR name = 'Amministratore del sistema'].id;
        u.LanguageLocaleKey = 'en_US';
        u.EmailEncodingKey = 'UTF-8';
        u.IsActive = true;
      
        insert u;
           
    	Date StartDate= Date.newInstance( 2018, 07,1);
    	Date EndDate= Date.newInstance(  2019,10,18 );
    	
    	 List <Opportunity> opp = [select  SFDC_Opportunity_Id__c from Opportunity where  Id =:testOpportunity.Id  limit 1];
    	String inputValue2= opp[0].SFDC_Opportunity_Id__c;

    
    list<WrapperClassTest> wrp= new  list<WrapperClassTest>();
   
    	ApexPages.StandardController sc = new ApexPages.StandardController(c);
SearchWithWrapperSS x =new  SearchWithWrapperSS();		
    	
  
	x.inputValue2  = inputValue2;
    x.StartDate = StartDate;
    x.EndDate = EndDate;
    x.loadData();

	
    System.debug('##> in2 ' +inputValue2 );
    
    	x.listBD[0].check_box=true;
    for(WrapperClassTest wTest :wrp)

  {
   wTest.check_box=true;    
  }
   	x.changeStatus();
   	x.processSelected(); 
    x.toSave();
    x.toDelete();

    
	
	
     Test.stopTest();
}
    Public class WrapperClassTest3{
        public Billing_Detail__c  cs {get;set;}
        public Boolean check_box {get;set;}
        public WrapperClassTest3(Billing_Detail__c  c, Boolean check_box)
        {
            this.cs = c;
            this.check_box = false;
        }
       public WrapperClassTest3(Billing_Detail__c c) {
            this.cs = c;
            this.check_box = false;
        }
    }
    
@isTest static void testController4() {
    Test.startTest();
    Id RecordTypeIdAccount = Schema.SObjectType.Account.getRecordTypeInfosByDeveloperName().get('Customer_user').getRecordTypeId();//get only macrostructure RT		
    // create the object in input of the class 
        Account a= new Account();
        a.name='Account test t';
        //a.RecordTypeId='012w0000000iROM';
        a.Branch__c='Italy';
        a.Status__c='Customer';
        a.BillingCountry='Italy';
        a.Public_Administration_Account__c='No';
        insert a;

		Opportunity testOpportunity = new Opportunity(
		AccountID = a.Id,
		Name = 'Test Opportunity',
		StageName = 'Needs Analysis',
		CloseDate = date.today().addDays(15)       		
		);
		insert testOpportunity;
    
    
    
    Billing_Detail__c c= new Billing_Detail__c(); 
		c.Amount__c= 100;
		c.Billing_Type__c='FEE';
		c.Billing_Period__c='monthly';
		c.Billing_Status__c='Authorized for Billing'; 
		c.Product_Line__c='Interactive Experience (iX)'; 
		c.Product__c='Chat Delivery'; 
		c.Monthly_Forecast__c=Date.newInstance(2018, 7, 9); 
		c.End_of_Billing__c=Date.newInstance(2019, 7, 9); 
		c.Billing_Detail__c=testOpportunity.Id;

		insert c;
         
        User u = new user();
        u.LastName = 'Admin';
        u.Email = 'test1@test.com';
        u.Alias = 'Tcode';
        u.Username = 'test123@test.com.testClass';
        u.CommunityNickname = 'test121';
        u.LocaleSidKey = 'en_US';
        u.TimeZoneSidKey = 'GMT';
        u.ProfileId = [Select id, name from Profile where name = 'System Administrator' OR name = 'Amministratore del sistema'].id;
        u.LanguageLocaleKey = 'en_US';
        u.EmailEncodingKey = 'UTF-8';
        u.IsActive = true;
      
        insert u;
           
    	Date StartDate= Date.newInstance( 2018, 07,1);
    	Date EndDate= Date.newInstance(  2019,10,18 );
    	String inputValue1= 'test1@test.com';


    
    list<WrapperClassTest> wrp= new  list<WrapperClassTest>();
   
    	ApexPages.StandardController sc = new ApexPages.StandardController(c);
SearchWithWrapperSS x =new  SearchWithWrapperSS();		
    	
    x.inputValue1  = inputValue1;

    x.StartDate = StartDate;
    x.EndDate = EndDate;
    x.loadData();

	System.debug('##> in1 ' +inputValue1 );

    
    	x.listBD[0].check_box=true;
    for(WrapperClassTest wTest :wrp)

  {
   wTest.check_box=true;    
  }
   	x.changeStatus();
   	x.processSelected(); 
    x.toSave();
    x.toDelete();

    
	
	
     Test.stopTest();
}
    Public class WrapperClassTest4{
        public Billing_Detail__c  cs {get;set;}
        public Boolean check_box {get;set;}
        public WrapperClassTest4(Billing_Detail__c  c, Boolean check_box)
        {
            this.cs = c;
            this.check_box = false;
        }
       public WrapperClassTest4(Billing_Detail__c c) {
            this.cs = c;
            this.check_box = false;
        }
    }    
    
}

the problem seems to be on the list of billing details on this 
I think it can be this instruction User-added image
listBD.add(new WrapperClass (cr, false));


Thanks,
Frank
Maharajan CMaharajan C
Hi Frank,

You have to use the system.runAs()  inside the method. Because you are using opportunity owner Id in filter based on the user email. Now you running the test class so the system will automatically consider you as the owner for all inserted records in test class and  below query will not return any data. because the owner email is you but it need the owner of user record you are inserting in test method. 

select id from Opportunity where OwnerId=:Owner  

So use the below syntax to run the method as specific user am using your testController4 method . And don't create wrappper in test class because those wrapper class will be automatically covered if you're billing records are found.

Understand the class properly then you can easily complete the test class.
  
@isTest static void testController4() {

User u = new user();
        u.LastName = 'Admin';
        u.Email = 'test1@test.com';
        u.Alias = 'Tcode';
        u.Username = 'test123@test.com.testClass';
        u.CommunityNickname = 'test121';
        u.LocaleSidKey = 'en_US';
        u.TimeZoneSidKey = 'GMT';
        u.ProfileId = [Select id, name from Profile where name = 'System Administrator' OR name = 'Amministratore del sistema'].id;
        u.LanguageLocaleKey = 'en_US';
        u.EmailEncodingKey = 'UTF-8';
        u.IsActive = true;
      
        insert u;
		
	system.runAs(){
    Id RecordTypeIdAccount = Schema.SObjectType.Account.getRecordTypeInfosByDeveloperName().get('Customer_user').getRecordTypeId();//get only macrostructure RT		
    // create the object in input of the class 
        Account a= new Account();
        a.name='Account test t';
        //a.RecordTypeId='012w0000000iROM';
        a.Branch__c='Italy';
        a.Status__c='Customer';
        a.BillingCountry='Italy';
        a.Public_Administration_Account__c='No';
        insert a;

		Opportunity testOpportunity = new Opportunity(
		AccountID = a.Id,
		Name = 'Test Opportunity',
		StageName = 'Needs Analysis',
		CloseDate = date.today().addDays(15)       		
		);
		insert testOpportunity;
    
    
    
    Billing_Detail__c c= new Billing_Detail__c(); 
		c.Amount__c= 100;
		c.Billing_Type__c='FEE';
		c.Billing_Period__c='monthly';
		c.Billing_Status__c='Authorized for Billing'; 
		c.Product_Line__c='Interactive Experience (iX)'; 
		c.Product__c='Chat Delivery'; 
		c.Monthly_Forecast__c=Date.newInstance(2018, 7, 9); 
		c.End_of_Billing__c=Date.newInstance(2019, 7, 9); 
		c.Billing_Detail__c=testOpportunity.Id;

		insert c;
         
           
    	Date StartDate= Date.newInstance( 2018, 07,1);
    	Date EndDate= Date.newInstance(  2019,10,18 );
    	String inputValue1= 'test1@test.com';


    
   
    	ApexPages.StandardController sc = new ApexPages.StandardController(c);
		SearchWithWrapperSS x =new  SearchWithWrapperSS();		
    	
    x.inputValue1  = inputValue1;

    x.StartDate = StartDate;
    x.EndDate = EndDate;
    x.loadData();
	
}
}




Thanks,
Maharajan.C