public void ClearAll_ShouldClearEverything()
{
var queryQueue = new QueryQueue();
var query1 = new TestQuery(1, QueryFunctionType.SingleQuote);
var query2 = new TestQuery(2, QueryFunctionType.IntraDay);
var query3 = new TestQuery(3, QueryFunctionType.Weekly);
queryQueue.Enqueue(query1);
queryQueue.Enqueue(query2);
queryQueue.Enqueue(query3);
queryQueue.ClearAll();
Assert.True(queryQueue.IsEmpty());
// can add query again which means duplication check is gone.
Assert.True(queryQueue.Enqueue(query1));
}