public void GroupWithSingleElementFilterArray()
{
var filter = new Filter <Person>();
filter.By("Birth.Country", Operation.IsEmpty, null, (object)null, Connector.And);
var andExpression = GroupBuilder.GetFilter(GroupBuilder.Group <Person>(Common.Connector.And, filter));
var orExpression = GroupBuilder.GetFilter(GroupBuilder.Group <Person>(Common.Connector.Or, filter));
var people1 = People.Where(andExpression);
var solution = People.Where(filter);
Assert.That(people1, Is.EquivalentTo(solution));
var people2 = People.Where(orExpression);
Assert.That(people2, Is.EquivalentTo(solution));
}