How to cover List<Schema.picklistEntry> in test Class

Question

The Below is the code for getting Multiselect picklist. Currently its returning null when i Run test class.

Class

 public List<string> Category{
    get; set;
    }

    public List < SelectOption > listcategory{
        get; set;
    }
           Schema.DescribeFieldResult fieldResult = Master__c.Type__c.getDescribe();    
            List<Schema.picklistEntry> ple = fieldResult.getPicklistValues(); 

             for(Schema.picklistEntry f:ple)    
            {    
                listcategory.add(new selectOption(f.getLabel(),f.getValue()));                                           
            } 

Where as the the Master__c.Type__c contains the values like

Actives,Passives,Misc and others

My Complete Controller runs on this snippet if its covered then my class will cover 100%.

So some one can let me know how to Pass the Above values into the Category field.

Test Class

@isTest
public class Testgenerate5 {

    static testMethod void testgenerate() {
             CreateDataHelper h = new CreateDataHelper();

             Product2 pr = h.CreateSingleproduct();
             insert pr;
             ProcurementAppSetup__c pba = h.createbilling();
             insert pba;



             Oper15 gbom = new Oper15 ();

             ApexPages.StandardController sc = new ApexPages.StandardController(boo);
             Oper15 ac = new Oper15 (sc);


             account a = h.CreateSingleAccount();
             insert a;

             Product2 p = h.CreateSingleproduct();
             insert p;

             Contact c = h.CreateSingleContact(a.id);
             insert c;

             MasterItem__c Mi = h.createMi();
             insert Mi;


             string indexParam = ApexPages.currentPage().getParameters().put('rowIndex', '0');

             Bom__c bb = h.createBom(p.id, pb.id);
             insert bb;

             Boolean disppop = false;

             gbom.setmallSelected();

     }
}

Answer 1

You could add this line in test class to assign value to Category before calling the method which executes the query.

gbom.Category = new List<String>{'Actives','Passives','Misc','others'};