public void TestGetValue()
{
ExprEvaluatorContext exprEvaluatorContext = SupportStatementContextFactory.MakeEvaluatorContext();
// apply 3 rows to group key 1, all aggregators evaluated their sub-expressions(constants 5 and 2)
_service.ApplyEnter(new EventBean[1], _groupOneKey, exprEvaluatorContext);
_service.ApplyEnter(new EventBean[1], _groupOneKey, exprEvaluatorContext);
_service.ApplyEnter(new EventBean[1], _groupTwoKey, exprEvaluatorContext);
_service.SetCurrentAccess(_groupOneKey, -1, null);
Assert.AreEqual(10, _service.GetValue(0, -1, EvaluateParams.EmptyTrue));
Assert.AreEqual(4, _service.GetValue(1, -1, EvaluateParams.EmptyTrue));
_service.SetCurrentAccess(_groupTwoKey, -1, null);
Assert.AreEqual(5, _service.GetValue(0, -1, EvaluateParams.EmptyTrue));
Assert.AreEqual(2, _service.GetValue(1, -1, EvaluateParams.EmptyTrue));
_service.ApplyLeave(new EventBean[1], _groupTwoKey, exprEvaluatorContext);
_service.ApplyLeave(new EventBean[1], _groupTwoKey, exprEvaluatorContext);
_service.ApplyLeave(new EventBean[1], _groupTwoKey, exprEvaluatorContext);
_service.ApplyLeave(new EventBean[1], _groupOneKey, exprEvaluatorContext);
_service.SetCurrentAccess(_groupOneKey, -1, null);
Assert.AreEqual(10 - 5, _service.GetValue(0, -1, EvaluateParams.EmptyTrue));
Assert.AreEqual(4 - 2, _service.GetValue(1, -1, EvaluateParams.EmptyTrue));
_service.SetCurrentAccess(_groupTwoKey, -1, null);
Assert.AreEqual(5 - 15, _service.GetValue(0, -1, EvaluateParams.EmptyTrue));
Assert.AreEqual(2 - 6, _service.GetValue(1, -1, EvaluateParams.EmptyTrue));
}