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SumaSuma 

Constructor error on test class for pagination

I have a visual force page to display a list of locations. I used pagination and wrote class for it and working finely. but the test class is giving me an error : Constructor not defined: [listView].()
Can you please help. Below is my code:
This is my Constructor class.

public class listView{
    ApexPages.StandardSetController con; 
    
  //controller
  public listView(ApexPages.StandardSetController con)
    {        
     this.con = con;
      con.setPageSize(20);   
     }   

    //Instantiate the StandardSetController   
    //public ApexPages.StandardSetController con{get; set;}   
       
    //Boolean to check if there are more records after the present displaying records   
    public Boolean hasNext   
    {   
        get   
        {   
            return con.getHasNext();   
        }   
        set;   
    }   
    
    //Boolean to check if there are more records before the present displaying records   
    public Boolean hasPrevious   
    {   
        get   
        {   
            return con.getHasPrevious();   
        }   
        set;   
    }   
    
    //Page number of the current displaying records   
    public Integer pageNumber   
    {   
        get   
        {   
            return con.getPageNumber();   
        }   
        set;   
    }   
  
    //Returns the previous page of records   
    public void previous()   
    {   
        con.previous();   
    }   
    
    //Returns the next page of records   
    public void next()   
    {   
        con.next();   
    }   
}


This is my Test class:

@isTest(SeeAllData=true)  
public class listViewTest {  

        public static testMethod void testlistView() {  
        PageReference pageRef = Page.DataCenterLocation;  
        Test.setCurrentPage(pageRef);

        // Instantiate a new controller with all parameters in the page

        
        listView lv =new listView();
               
        lv.Next();
       
       
        lv.Previous();
       
        lv.con.getHasPrevious();
        lv.con.getHasNext();
        lv.con.getPageNumber();


     }

}

This is my VF page


<apex:page standardController="Data_Center_Location__c" recordsetVar="dclocation" extensions="listView">
<apex:form > <apex:pageBlock title="Data Center Locations">
<apex:pageBlockSection columns="4">
<apex:pageBlockTable style="width:200%" value="{!dclocation}" var="dclitem">
<apex:column style="width:250px" headerValue="Yardi Location Code">
<apex:outputField value="{!dclitem.Yardi_Location_Code__c}"/> </apex:column>
<apex:column headerValue="Opportunity Location Code">
<apex:outputField style="width:250px" value="{!dclitem.Opportunity_Location_Code__c}"/>
</apex:column>
<apex:column headerValue="Address">
<apex:outputField style="width:250px" value="{!dclitem.Address__c}"/>
</apex:column>
<apex:column headerValue="City">
<apex:outputField style="width:250px" value="{!dclitem.City__c}"/>
</apex:column>
</apex:pageBlockTable>
</apex:pageBlockSection>
<apex:commandLink action="{!Previous}" value="Previous" rendered="{!HasPrevious}"/>&nbsp;&nbsp; <apex:commandLink action="{!Next}" value="Next" rendered="{!HasNext}"/> </apex:pageBlock> </apex:form> </apex:page>

 
Best Answer chosen by Suma
Vivek DeshmaneVivek Deshmane
Hi ,
Try below code and mark the answer if it works for you.
List<Opportunity> opps = new List<Opportunity>();
opps.add( [ Select Id From Opportunity Where Id = : cocr.Opportunity__c ] );
opportunityContactEntryExtension oCEE = new OpportunityContactEntryExtension(new ApexPages.StandardSetController( opps ));


@isTest(SeeAllData=false)  
public class listViewTest {  

        public static testMethod void testlistView() {  
        PageReference pageRef = Page.DataCenterLocation;  
        Test.setCurrentPage(pageRef);
        
		List<Data_Center_Location__c> dataLst = new List<Data_Center_Location__c>();
		Data_Center_Location__c newdataRecord1 = new Data_Center_Location__c();
		Data_Center_Location__c newdataRecord2 = new Data_Center_Location__c();
		newdataRecord1.name='test1';
		newdataRecord2.name='test1';
		dataLst.add(newdataRecord1);
		dataLst.add(newdataRecord2);
		insert dataLst;
                
        listView lv =new listView(new ApexPages.StandardSetController(dataLst));
               
        lv.Next();
       
       
        lv.Previous();
       
        lv.getHasPrevious();
        lv.getHasNext();
        lv.getPageNumber();


     }

}

Best Regards,
-Vivek

All Answers

Vivek DeshmaneVivek Deshmane
Hi ,
Try Below Code and let me know.
@isTest(SeeAllData=false)  
public class listViewTest {  

        public static testMethod void testlistView() {  
        PageReference pageRef = Page.DataCenterLocation;  
        Test.setCurrentPage(pageRef);
        
		List<Data_Center_Location__c> dataLst = new List<Data_Center_Location__c>();
		Data_Center_Location__c newdataRecord1 = new Data_Center_Location__c();
		Data_Center_Location__c newdataRecord2 = new Data_Center_Location__c();
		newdataRecord1.name='test1';
		newdataRecord2.name='test1';
		dataLst.add(newdataRecord1);
		dataLst.add(newdataRecord2);
		insert dataLst;
                
        listView lv =new listView(new ApexPages.StandardSetController(dataLst));
               
        lv.Next();
       
       
        lv.Previous();
       
        lv.con.getHasPrevious();
        lv.con.getHasNext();
        lv.con.getPageNumber();


     }

}

Please follow below salesforce Best Practice for Test Classes :-

1. Test class must start with @isTest annotation if class class version is more than 25
2. Test environment support @testVisible , @testSetUp as well
3. Unit test is to test particular piece of code working properly or not .
4. Unit test method takes no argument ,commit no data to database ,send no email ,flagged with testMethod keyword .
5. To deploy to production at-least 75% code coverage is required 
6. System.debug statement are not counted as a part of apex code limit.
7. Test method and test classes are not counted as a part of code limit
9. We should not focus on the  percentage of code coverage ,we should make sure that every use case should covered including positive, negative,bulk and single record .
Single Action -To verify that the the single record produces the correct an expected result .
Bulk action -Any apex record trigger ,class or extension must be invoked for 1-200 records .
Positive behavior : Test every expected behavior occurs through every expected permutation , i,e user filled out every correctly data and not go past the limit .
Negative Testcase :-Not to add future date , Not to specify negative amount.
Restricted User :-Test whether a user with restricted access used in your code .10. Test class should be annotated with @isTest .
11 . @isTest annotation with test method  is equivalent to testMethod keyword .
12. Test method should static and no void return type .
13. Test class and method default access is private ,no matter to add access specifier .
14. classes with @isTest annotation can't be a interface or enum .
15. Test method code can't be invoked by non test request .
16. Stating with salesforce API 28.0 test method can not reside inside non test classes .
17. @Testvisible annotation to make visible private methods inside test classes.
18. Test method can not be used to test web-service call out . Please use call out mock .
19. You can't  send email from test method.
20.User, profile, organization, AsyncApexjob, Corntrigger, RecordType, ApexClass, ApexComponent ,ApexPage we can access without (seeAllData=true) .
21. SeeAllData=true will not work for API 23 version eailer .
22. Accessing static resource test records in test class e,g List<Account> accList=Test.loadData(Account,SobjectType,'ResourceName').
23. Create TestFactory class with @isTest annotation to exclude from organization code size limit .
24. @testSetup to create test records once in a method  and use in every test method in the test class .
25. We can run unit test by using Salesforce Standard UI,Force.com IDE ,Console ,API.
26. Maximum number of test classes run per 24 hour of period is  not grater of 500 or 10 multiplication of test classes of your organization.
27. As apex runs in system mode so the permission and record sharing are not taken into account . So we need to use system.runAs to enforce record sharing .
28. System.runAs will not enforce user permission or field level permission .
29. Every test to runAs count against the total number of DML issued in the process .




 
Best Regards,
-Vivek
SumaSuma
Hi Vivek,

Thank you for the reply. I tried this code and now getting the error:
Error: Compile Error: Variable is not visible: con at line 47 column 9
 
Vivek DeshmaneVivek Deshmane
Hi ,
Try below code and mark the answer if it works for you.
List<Opportunity> opps = new List<Opportunity>();
opps.add( [ Select Id From Opportunity Where Id = : cocr.Opportunity__c ] );
opportunityContactEntryExtension oCEE = new OpportunityContactEntryExtension(new ApexPages.StandardSetController( opps ));


@isTest(SeeAllData=false)  
public class listViewTest {  

        public static testMethod void testlistView() {  
        PageReference pageRef = Page.DataCenterLocation;  
        Test.setCurrentPage(pageRef);
        
		List<Data_Center_Location__c> dataLst = new List<Data_Center_Location__c>();
		Data_Center_Location__c newdataRecord1 = new Data_Center_Location__c();
		Data_Center_Location__c newdataRecord2 = new Data_Center_Location__c();
		newdataRecord1.name='test1';
		newdataRecord2.name='test1';
		dataLst.add(newdataRecord1);
		dataLst.add(newdataRecord2);
		insert dataLst;
                
        listView lv =new listView(new ApexPages.StandardSetController(dataLst));
               
        lv.Next();
       
       
        lv.Previous();
       
        lv.getHasPrevious();
        lv.getHasNext();
        lv.getPageNumber();


     }

}

Best Regards,
-Vivek
This was selected as the best answer
SumaSuma
Vivek,
I tried that before posting it here...this is the error getting now
Compile Error: Method does not exist or incorrect signature: [listView].getHasPrevious() 
SumaSuma
got it right.
just need this :
 boolean t1 = lv.hasNext;
        boolean t2= lv.hasPrevious;
        integer t3 = lv.pageNumber;
 
Vivek DeshmaneVivek Deshmane
Hi,
Try below code and it should work,let me know.
@isTest(SeeAllData=false)  
public class listViewTest {  

        public static testMethod void testlistView() {  
        PageReference pageRef = Page.DataCenterLocation;  
        Test.setCurrentPage(pageRef);
        
		List<Data_Center_Location__c> dataLst = new List<Data_Center_Location__c>();
		Data_Center_Location__c newdataRecord1 = new Data_Center_Location__c();
		Data_Center_Location__c newdataRecord2 = new Data_Center_Location__c();
		newdataRecord1.name='test1';
		newdataRecord2.name='test1';
		dataLst.add(newdataRecord1);
		dataLst.add(newdataRecord2);
		insert dataLst;
                
        listView lv =new listView(new ApexPages.StandardSetController(dataLst));
               
        lv.Next();
       
       
        lv.Previous();
        lv.hasPrevious;
        lv.hasNext;
		lv.next();
        lv.PageNumber;


     }

}

Best Regards,
-Vivek