text: describe("Expense objects", function(){
  
      var expenseItem, expense;
  
      beforeEach(function(){
          expenseItem = new ExpenseItem(100);
          expense = new Expense(expenseItem);
      });
  
     it("should be of type ExpenseItem", function(){
         expect(expense.expenseItem).toBe(expenseItem);
     });
  
      it("should have the correct expense amount", function(){
          expect(expense.expenseItem.amount).toEqual(100);
      });
  });