/// <summary>
/// Build a merged list of safes.
/// </summary>
/// <param name="leftItems">List of safes from the left repository, whose order has precedence.</param>
/// <param name="rightItems">List of safes from the right side repository.</param>
/// <returns>List of safes for the new merged repository.</returns>
private static SafeListModel BuildMergedListOfSafes(SafeListModel leftItems, SafeListModel rightItems)
{
SafeListModel result = new SafeListModel();
var map = OuterJoin(leftItems, rightItems, item => item.Id);
foreach (Tuple <SafeModel, SafeModel> pair in map)
{
if (pair.Item1 == null)
{
// Only available on the right side
result.Add(pair.Item2.Clone());
}
else if (pair.Item2 == null)
{
// Only available on the left side
result.Add(pair.Item1.Clone());
}
else
{
// Take the more recent
SafeModel lastModifiedItem = ChooseLastModified(
pair.Item1, pair.Item2, item => item.ModifiedAt, null);
result.Add(lastModifiedItem.Clone());
}
}
return(result);
}
public void FindOldestOpenSafeWorksCorrectly()
{
SafeListModel list = new SafeListModel();
byte[] testKey = new byte[0];
// Search in empty list
Assert.IsNull(list.FindOldestOpenSafe());
// Search with only one element
SafeModel safe2002 = new SafeModel {
CreatedAt = new DateTime(2002, 02, 02), Key = testKey
};
list.Add(safe2002);
Assert.AreSame(safe2002, list.FindOldestOpenSafe());
// Add newer element
SafeModel safe2003 = new SafeModel {
CreatedAt = new DateTime(2003, 03, 03), Key = testKey
};
list.Add(safe2003);
Assert.AreSame(safe2002, list.FindOldestOpenSafe());
// Add closed safe
SafeModel safe2000 = new SafeModel {
CreatedAt = new DateTime(2000, 01, 01), Key = null
};
list.Add(safe2000);
Assert.AreSame(safe2002, list.FindOldestOpenSafe());
// Add older element
SafeModel safe2001 = new SafeModel {
CreatedAt = new DateTime(2001, 01, 01), Key = testKey
};
list.Add(safe2001);
Assert.AreSame(safe2001, list.FindOldestOpenSafe());
}