public void CurrentMonthTotalExpenses_Works_Correctly()
{
var controller = new ExpenseController(_mockExpenseService.Object);
var apiCallValue = controller.CurrentMonthTotalExpenses(sampleEmployee.Id);
_mockExpenseService.Verify(x => x.StaffTotalExpensesForThisMonth(It.Is <string>(input =>
input == sampleEmployee.Id)));
Assert.IsInstanceOfType(apiCallValue, typeof(OkNegotiatedContentResult <int>));
}