public void LocationDisplayModelComparerClassCompareMethodReturnsZeroIfConstructedForDownAndBothParametersAreNull()
{
LocationDisplayModelComparer comparer = new LocationDisplayModelComparer(Direction.Down);
int result = comparer.Compare(null, null);
Assert.AreEqual(0, result);
}
public void LocationDisplayModelComparerClassCompareMethodReturnsOneIfConstructedForDownFirstParameterIsNotNullAndSecondParameterIsNull()
{
LocationDisplayModelComparer comparer = new LocationDisplayModelComparer(Direction.Down);
LocationDisplayModel location = new LocationDisplayModel {
Mileage = DistanceHelpers.GetDistance()
};
int result = comparer.Compare(location, null);
Assert.AreEqual(1, result);
}
public void LocationDisplayModelComparerClassCompareMethodReturnsOneIfConstructedForUpAndFirstParameterHasLowerMileageThanSecondParameter()
{
LocationDisplayModelComparer comparer = new LocationDisplayModelComparer(Direction.Up);
LocationDisplayModel x = new LocationDisplayModel {
Mileage = DistanceHelpers.GetDistance()
};
LocationDisplayModel y = new LocationDisplayModel {
Mileage = DistanceHelpers.GetDistanceGreaterThan(x.Mileage)
};
int result = comparer.Compare(x, y);
Assert.AreEqual(1, result);
}
public void LocationDisplayModelComparerClassCompareMethodReturnsMinusOneIfConstructedForDownAndParametersHaveSameMileageAndFirstParameterIsArrivalRowAndSecondParameterIsDepartureRow()
{
LocationDisplayModelComparer comparer = new LocationDisplayModelComparer(Direction.Down);
LocationDisplayModel x = new LocationDisplayModel {
Mileage = DistanceHelpers.GetDistance(), LocationKey = _rnd.NextHexString(8) + "-a"
};
LocationDisplayModel y = new LocationDisplayModel {
Mileage = new Distance {
Mileage = x.Mileage.Mileage, Chainage = x.Mileage.Chainage
}, LocationKey = _rnd.NextHexString(8) + "-d"
};
int result = comparer.Compare(x, y);
Assert.AreEqual(-1, result);
}
/// <summary>
/// Add an element to a sorted collection, using the given <see cref="IComparer{LocationDisplayModel}" /> to determine the location to insert the element at.
/// </summary>
/// <param name="item">The element to be added to the collection.</param>
/// <param name="comparer">The comparer to use when determining the location the element should be inserted at.</param>
public int AddSorted(LocationDisplayModel item, LocationDisplayModelComparer comparer)
{
if (item is null)
{
throw new ArgumentNullException(nameof(item));
}
lock (InnerCollection)
{
if (InnerCollection.Count == 0)
{
Add(item);
return(Count - 1);
}
if (comparer == null)
{
throw new ArgumentNullException(nameof(comparer));
}
InnerCollection.Add(item);
for (var i = InnerCollection.Count - 1; i > 0; i--)
{
var comparison = comparer.Compare(InnerCollection[i], InnerCollection[i - 1]);
if (comparison < 0)
{
LocationDisplayModel swap = InnerCollection[i];
InnerCollection[i] = InnerCollection[i - 1];
InnerCollection[i - 1] = swap;
}
else
{
SetDisplaySeparatorPropertiesOfGroup(item.LocationId);
OnAdd(item, i);
return(i);
}
}
SetDisplaySeparatorPropertiesOfGroup(item.LocationId);
OnAdd(item, 0);
return(0);
}
}
