public async Task GroupByEmployeeIdentifierGetHighCountInOrders()
{
List <Employees> employeeList = await OrderOperations.GetEmployeesTask();
IGrouping <int, Employees> employee = OrderOperations.EmployeeMostOrders(employeeList);
// https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/builtin-types/default-values
Assert.IsTrue(employee != default);
Debug.WriteLine($"Order count: {employee.Count()} employee id: {employee.Key}");
SqlOperations.Server = ".\\SQLEXPRESS";
SqlOperations.Database = "NorthWind2020";
// | |
// V V <- Discards
var(_, _, dictionary) = SqlOperations.EmployeeMostOrders();
Assert.AreEqual(employee.Count(), dictionary.FirstOrDefault().Value);
}