public void TestTrim()
        {
            OsmSharp.Math.Random.StaticRandomGenerator.Set(116542346);

            var box = new GeoCoordinateBox(
                new GeoCoordinate(90, 180),
                new GeoCoordinate(-90, -180));
            var size = 100;
            var maxCollectionSize = 4;
            var referenceDictionary = new Dictionary<long, ICoordinateCollection>();
            var coordinates = new HugeCoordinateCollectionIndex(400);
            for (int idx = 0; idx < size; idx++)
            {
                var currentSize = OsmSharp.Math.Random.StaticRandomGenerator.Get().Generate(maxCollectionSize) + 1;
                var coordinatesArray = new GeoCoordinate[currentSize];
                while (currentSize > 0)
                {
                    coordinatesArray[currentSize - 1] = box.GenerateRandomIn(OsmSharp.Math.Random.StaticRandomGenerator.Get());
                    currentSize--;
                }
                var coordinatesCollection = new CoordinateArrayCollection<GeoCoordinate>(coordinatesArray);
                referenceDictionary[idx] = coordinatesCollection;
                coordinates[idx] = coordinatesCollection;
            }

            // execute the trim.
            coordinates.Trim();

            // check result.
            for (int idx = 0; idx < size; idx++)
            {
                var referenceCollection = referenceDictionary[idx];
                var collection = coordinates[idx];

                referenceCollection.Reset();
                collection.Reset();

                while (referenceCollection.MoveNext())
                {
                    Assert.IsTrue(collection.MoveNext());
                    Assert.AreEqual(referenceCollection.Latitude, collection.Latitude);
                    Assert.AreEqual(referenceCollection.Longitude, collection.Longitude);
                }
                Assert.IsFalse(collection.MoveNext());
            }
        }
        public void TestSerialize()
        {
            OsmSharp.Math.Random.StaticRandomGenerator.Set(116542346);

            var box = new GeoCoordinateBox(
                new GeoCoordinate(90, 180),
                new GeoCoordinate(-90, -180));
            var size = 5;
            var maxCollectionSize = 4;
            var referenceDictionary = new Dictionary<long, ICoordinateCollection>();
            var coordinates = new HugeCoordinateCollectionIndex(100);
            for (int idx = 0; idx < size; idx++)
            {
                var currentSize = OsmSharp.Math.Random.StaticRandomGenerator.Get().Generate(maxCollectionSize) + 1;
                var coordinatesArray = new GeoCoordinate[currentSize];
                while (currentSize > 0)
                {
                    coordinatesArray[currentSize - 1] = box.GenerateRandomIn(OsmSharp.Math.Random.StaticRandomGenerator.Get());
                    currentSize--;
                }
                var coordinatesCollection = new CoordinateArrayCollection<GeoCoordinate>(coordinatesArray);
                referenceDictionary[idx] = coordinatesCollection;
                coordinates[idx] = coordinatesCollection;
            }

            coordinates.Trim();
            coordinates.Compress();

            byte[] data = null;
            using(var stream = new MemoryStream())
            {
                long length = coordinates.Serialize(stream);
                data = stream.ToArray();

                Assert.AreEqual(168, length);
                Assert.AreEqual(data.Length, length);
            }

            var result = HugeCoordinateCollectionIndex.Deserialize(new MemoryStream(data));

            // check result.
            for (int idx = 0; idx < size; idx++)
            {
                var referenceCollection = referenceDictionary[idx];
                var collection = result[idx];

                referenceCollection.Reset();
                collection.Reset();

                while (referenceCollection.MoveNext())
                {
                    Assert.IsTrue(collection.MoveNext());
                    Assert.AreEqual(referenceCollection.Latitude, collection.Latitude);
                    Assert.AreEqual(referenceCollection.Longitude, collection.Longitude);
                }
                Assert.IsFalse(collection.MoveNext());
            }

            result = HugeCoordinateCollectionIndex.Deserialize(new MemoryStream(data), true);

            // check result.
            for (int idx = 0; idx < size; idx++)
            {
                var referenceCollection = referenceDictionary[idx];
                var collection = result[idx];

                referenceCollection.Reset();
                collection.Reset();

                while (referenceCollection.MoveNext())
                {
                    Assert.IsTrue(collection.MoveNext());
                    Assert.AreEqual(referenceCollection.Latitude, collection.Latitude);
                    Assert.AreEqual(referenceCollection.Longitude, collection.Longitude);
                }
                Assert.IsFalse(collection.MoveNext());
            }
        }