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using Microsoft.VisualStudio.TestTools.UnitTesting;

using GeoJSON.Net.Geometry;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Serialization;

using System;

using System.Collections.Generic;

using System.Globalization;

using System.Linq;

using System.Text.RegularExpressions;

namespace GeoJSON.Net.Tests

{

[TestClass]

public class SerializationTest : TestBase

{

[TestMethod]

public void PolygonSerialization()

{

var coordinates = new List<GeographicPosition>

{

new GeographicPosition(52.370725881211314, 4.889259338378906),

new GeographicPosition(52.3711451105601, 4.895267486572266),

new GeographicPosition(52.36931095278263, 4.892091751098633),

new GeographicPosition(52.370725881211314, 4.889259338378906)

}.ToList<IPosition>();

var model = new Polygon(new List<LineString> { new LineString(coordinates) });

var serializedData = JsonConvert.SerializeObject(model, Formatting.Indented, DefaultJsonSerializerSettings);

var matches = Regex.Matches(serializedData, @"(?<coordinates>[0-9]+([.,][0-9]+))");

double lng;

double.TryParse(matches[0].Value, NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out lng);

//Double precision can pose a problem

Assert.IsTrue(Math.Abs(lng - 4.889259338378906) < 0.0000001);

Assert.IsTrue(!serializedData.Contains("latitude"));

}

[TestMethod]

public void MultiLineStringSerialization()

{

var coordinates = new[]

{

new List<IPosition>

{

new GeographicPosition(52.370725881211314, 4.889259338378906),

new GeographicPosition(52.3711451105601, 4.895267486572266),

new GeographicPosition(52.36931095278263, 4.892091751098633),

new GeographicPosition(52.370725881211314, 4.889259338378906)

},

new List<IPosition>

{

new GeographicPosition(52.370725881211314, 4.989259338378906),

new GeographicPosition(52.3711451105601, 4.995267486572266),

new GeographicPosition(52.36931095278263, 4.992091751098633),

new GeographicPosition(52.370725881211314, 4.989259338378906)

},

};

var model = new MultiLineString(coordinates.Select(ca => new LineString(ca)).ToList());

var serializedData = JsonConvert.SerializeObject(model, DefaultJsonSerializerSettings);

var matches = Regex.Matches(serializedData, @"(?<coordinates>[0-9]+([.,][0-9]+))");

double lng;

double.TryParse(matches[0].Value, NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out lng);

//Double precision can pose a problem

Assert.IsTrue(Math.Abs(lng - 4.889259338378906) < 0.0000001);

Assert.IsTrue(!serializedData.Contains("latitude"));

}

[TestMethod]

public void GeographicPositionSerialization()

{

var model = new GeographicPosition(112.12, 10);

var serialized = JsonConvert.SerializeObject(model, new JsonSerializerSettings { ContractResolver = new CamelCasePropertyNamesContractResolver() });

var matches = Regex.Matches(serialized, @"(\d+.\d+)");

Assert.IsTrue(matches.Count == 2);

double lng;

Assert.IsTrue(double.TryParse(matches[0].Value, NumberStyles.AllowDecimalPoint | NumberStyles.AllowLeadingSign, CultureInfo.InvariantCulture, out lng));

Assert.AreEqual(lng, 112.12);

}

[TestMethod]

public void MultiPolygonSerialization()

{

var expectedJson = "{\"geometry\":{\"coordinates\":[[[[0.0,0.0],[1.0,0.0],[1.0,1.0],[0.0,1.0],[0.0,0.0]]],[[[100.0,100.0],[101.0,100.0],[101.0,101.0],[100.0,101.0],[100.0,100.0]],[[200.0,200.0],[201.0,200.0],[201.0,201.0],[200.0,201.0],[200.0,200.0]]]],\"type\":\"MultiPolygon\"},\"properties\":{},\"type\":\"Feature\"}";

var polygon1 = new Polygon(new List<LineString>

{

new LineString((new List<GeographicPosition>

{

new GeographicPosition(0, 0),

new GeographicPosition(0, 1),

new GeographicPosition(1, 1),

new GeographicPosition(1, 0),

new GeographicPosition(0, 0)

}).ToList<IPosition>())

});

var polygon2 = new Polygon(new List<LineString>

{

new LineString((new List<GeographicPosition>

{

new GeographicPosition(100, 100),

new GeographicPosition(100, 101),

new GeographicPosition(101, 101),

new GeographicPosition(101, 100),

new GeographicPosition(100, 100)

}).ToList<IPosition>()),

new LineString((new List<GeographicPosition>

{

new GeographicPosition(200, 200),

new GeographicPosition(200, 201),

new GeographicPosition(201, 201),

new GeographicPosition(201, 200),

new GeographicPosition(200, 200)

}).ToList<IPosition>())

});

var multipolygon = new MultiPolygon(new List<Polygon> { polygon1, polygon2 });

var newFeature = new Feature.Feature(multipolygon);

var serializedData = JsonConvert.SerializeObject(newFeature, Formatting.Indented, DefaultJsonSerializerSettings);

var serializedDataWithouWhiteSpace = Regex.Replace(serializedData, @"(\s|$)+", "");

Assert.IsTrue(serializedDataWithouWhiteSpace == expectedJson);

}

}

public static class JsonAssert

{

public static void AssertCoordinates(string geojson, int expectedNesting, IEnumerable<object> coords)

{

var coordMatch = Regex.Matches(geojson, "\"coordinates\":(.+?)(,\\s*\"|})");

Assert.AreEqual(1, coordMatch.Count);

var deserializedCoords = JsonConvert.DeserializeObject<JArray>(coordMatch[0].Groups[1].Value);

AssertCoordInternal(deserializedCoords, expectedNesting, coords);

}

public static void AssertCoordInternal(JArray coords, int expectedNesting, IEnumerable<object> expectedCoords)

{

Assert.IsTrue(expectedNesting >= 0);

if (expectedNesting == 0)

{

AssertCoordinate((GeographicPosition)expectedCoords.First(), coords);

}

else

{

var enumerator = expectedCoords.GetEnumerator();

var moveNext = enumerator.MoveNext();

var i = 0;

foreach (var deserializedCoord in coords)

{

Assert.IsTrue(moveNext);

var array = deserializedCoord as JArray;

if (array != null && array.Count > 0 && !(array[0] is JValue))

{

AssertCoordInternal(array, expectedNesting - 1, (IEnumerable<object>)enumerator.Current);

}

else if (array != null)

{

var expectedCoord = (GeographicPosition)enumerator.Current;

AssertCoordinate(expectedCoord, array);

}

moveNext = enumerator.MoveNext();

i++;

}

}

}

public static void AssertCoordinate(GeographicPosition expectedCoord, JArray array)

{

Assert.AreEqual(expectedCoord.Latitude, (double)array[1], 1e-6);

Assert.AreEqual(expectedCoord.Longitude, (double)array[0], 1e-6);

}

}

}