public void LetSubQueryTest()
{
AQuery subquery = _db.Query
.For("y", AValue.Field(TestDocumentCollectionName))
.Collect()
.Aggregate("max", ANumeric.Max(AValue.Field("y.value")))
.Return(AReturn.Variable("max"));
AQuery query = _db.Query
.Let("x", AValue.Subquery <int>(subquery));
Assert.AreEqual("LET x = (FOR y IN " + TestDocumentCollectionName + " COLLECT AGGREGATE max = MAX(y.value) RETURN max)", query.GetExpression());
}