public void TestFilterClause()
{
//---------------Set up test pack-------------------
_testBuilder.Operator = FilterClauseOperator.OpGreaterThan;
_testBuilder.UsingEnumTypeConstructor = true;
var filter = _testBuilder.CreateInstance();
var comboBox = (IComboBox)filter.Control;
var text = Convert.ToString(PurchaseOrderStatus.Processed);
comboBox.Text = text;
comboBox.SelectedIndex = 2;
//---------------Execute Test ----------------------
IFilterClause filterClause = filter.GetFilterClause(new DataViewFilterClauseFactory());
//---------------Test Result -----------------------
Assert.AreEqual(string.Format("{0} > '{1}'", _testBuilder.PropertyName, PurchaseOrderStatus.Processed), filterClause.GetFilterClauseString());
}