Hello,
Here i am tried to write a test class for importing csv file.THere is no code coverage.Plese help me on this.

Controller Class-
public class adminPriorSale {
    public list<Sales__c> accon{get;set;}
    public Sales__c agnt{get;set;}
    
    public Blob csvFileBody{get;set;}
    public string csvAsString{get;set;}
    public String[] csvFileLines{get;set;}
    
    public adminPriorSale(apexpages.standardcontroller controller )
   {
     agnt = new Distributor_Prior_Sales__c();
     accon = New List<Distributor_Prior_Sales__c>(); 
     accon=[selectid,Name,SMS_sales_amount__c,SMS_Year__c,Exhibit_A_Customer__c,Calculation_Type__c from Distributor_Prior_Sales__c]; 
     csvFileLines = new String[]{};
     
     }

public void importCSVFile(){
        
       try{
              csvAsString = csvFileBody.toString();
              csvFileLines = csvAsString.split('\n'); 
              for(Integer i=0;i<csvFileLines.size();i++){
               Sales__c prisale = new Sales__c () ;
               string[] csvRecordData = csvFileLines[i].split(',');
               prisale.Year__c= csvRecordData[0] ;             
               prisale.sales_amount__c= Decimal.valueof(csvRecordData[1]);
               prisale.Customer__c= csvRecordData[2];
               prisale.Calculation_Type__c = csvRecordData[3];   
               accon.add(prisale); 
             
           }
        upsert accon;
        
        }
        catch (Exception e)
        {
            ApexPages.Message errorMessage = new ApexPages.Message(ApexPages.severity.ERROR,e.getMessage());
            ApexPages.addMessage(errorMessage);
        } 
        
  } 
}   



Testclass-
 @isTest
private class test_ExhibitAadminPriorSale {
    static testMethod void test_ExhibitAadminPriorSale4()
    { 
      //  Distributor_Prior_Sales__c   t1= new Distributor_Prior_Sales__c  ();
        //t1.Name='test1';
        //t1.SMS_sales_amount__c =123;
        //t1.SMS_Year__c='2014';
       // insert t1;
  
      
        Document lstDoc = [select id,name,Body from Document where name = 'accttest'];
 
        ExhibitAadminPriorSale file=new ExhibitAadminPriorSale ();
        file.fileAccess();
        Blob content= lstDoc.Body;
        file.csvFileBody = content; 
        file.importCSVFile(); 

file.csvAsString =content.toString();
String[] csvFileLines = new String[]{};
List accon;

accon = new List();
for (Integer i=1;i<csvFileLines.size();i++)
{
String[] csvRecordData = new String[]{};
csvRecordData = csvFileLines [i].split(',');
//Distributor_Prior_Sales__c a = new Distributor_Prior_Sales__c ();
Distributor_Prior_Sales__c   t1= new Distributor_Prior_Sales__c  ();
        t1.Name='test1';
        t1.SMS_sales_amount__c =123;
        t1.SMS_Year__c='2012';
        t1.Exhibit_A_Customer__c='I Architects';
        t1.Calculation_Type__c='Estimated Prior sales';
        t1.RecordTypeId = '0011900000AFc6c';

accon.add(t1); 
try{
      insert accon;
}
catch (Exception e)
{
      ApexPages.Message errormsg = new ApexPages.Message(ApexPages.severity.ERROR,'An error has occured. Please check the template');
      ApexPages.addMessage(errormsg);
}

}
}