protected void AssertRoundTrip(Geometry inputGeometry, Geometry expectedGeometry,
string?name = null, IAttributesTable?properties = null, uint?id = null,
double expectedNumFeatures = 1, IAttributesTable?expectedProperties = null)
{
if (inputGeometry == null)
{
inputGeometry = FeatureGeometry;
}
if (expectedGeometry == null)
{
expectedGeometry = inputGeometry;
}
if (string.IsNullOrWhiteSpace(name))
{
name = LayerName;
}
if (properties == null)
{
properties = FeatureProperties;
}
if (expectedProperties == null)
{
expectedProperties = properties;
}
var featureS = new Feature(inputGeometry, properties);
if (id.HasValue)
{
featureS.Attributes[UID] = id;
}
var vtS = new VectorTile {
TileId = 0
};
var lyrS = new Layer {
Name = name
};
lyrS.Features.Add(featureS);
vtS.Layers.Add(lyrS);
VectorTile?vtD = null;
using (var ms = new MemoryStream())
{
vtS.Write(ms, Extent);
ms.Position = 0;
vtD = new MapboxTileReader(Factory).Read(ms, new VectorTiles.Tiles.Tile(0));
}
Assert.NotNull(vtD);
Assert.False(vtD.IsEmpty);
Assert.Equal(1, vtD.Layers.Count);
Assert.Equal(expectedNumFeatures, vtD.Layers[0].Features.Count);
var featureD = vtD.Layers[0].Features[0];
// Perform geometry checks
CheckGeometry(expectedGeometry, featureD.Geometry);
// Perform attribute checks
CheckAttributes(expectedProperties, featureD.Attributes);
}
private void FeatureIdReadWriteTest(Features.Feature featureS, ulong expectedId, string?idAttributeName = null)
{
var vtS = new VectorTile {
TileId = 0
};
var lyrS = new Layer {
Name = "test"
};
lyrS.Features.Add(featureS);
vtS.Layers.Add(lyrS);
using (var ms = new MemoryStream())
{
if (string.IsNullOrEmpty(idAttributeName))
{
//No ID property specified when writing.
vtS.Write(ms);
}
else
{
vtS.Write(ms, 4096, idAttributeName);
}
ms.Position = 0;
//Get the raw Mapbox Tile Feature Id value and compare to expected.
var tile = ProtoBuf.Serializer.Deserialize <NetTopologySuite.IO.VectorTiles.Mapbox.Tile>(ms);
var id = tile.Layers[0].Features[0].Id;
//Verify the id values match.
Assert.Equal(expectedId, id);
//Now test the Mapbox reader.
if (string.IsNullOrEmpty(idAttributeName))
{
idAttributeName = "id";
}
//Clear the keys and the feature's tags from the vector tiles. This will remove attribute values from the Mapbox feature.
//This ensures we are testing the Mapbox Features ID value, and not features attributes.
tile.Layers[0].Keys.Clear();
tile.Layers[0].Features[0].Tags.Clear();
using (var ms2 = new MemoryStream())
{
//Serialize the modified tile.
ProtoBuf.Serializer.Serialize <NetTopologySuite.IO.VectorTiles.Mapbox.Tile>(ms2, tile);
ms2.Position = 0;
//Read the tile. Specify the ID attribute name we want the ID value to be stored.
//By default the reader won't capture the ID value unless specified what attribute to store it in.
//The reason for this is that all Mapbox features have a default ID of 0, and it may be undesirable to capture this. This also ensures backwords compatibility.
var vtD = new MapboxTileReader().Read(ms2, new VectorTiles.Tiles.Tile(0), idAttributeName);
//Get the first feature. The ID value should be captured in it's attributes.
var f = vtD.Layers[0].Features[0];
//Compare with the expected ID.
Assert.Equal(expectedId, f.Attributes[idAttributeName]);
}
}
}