using System.IO.Compression;
using System.Text;
using Xunit;
namespace LehrerApp.Api.Tests;
public sealed class DwdWeatherServiceTests
{
[Fact]
public void ParseStationCatalog_LiestFestbreitenformatUndFindetNaechsteStation()
{
const string catalog = """
ID ICAO NAME LAT LON ELEV
----- ---- -------------------- ----- ------- -----
10641 EDDF OFFENBACH-WETTERPARK 50.08 8.78 119
10382 EDDT BERLIN-TEGEL 52.56 13.31 37
""";
var stations = DwdWeatherService.ParseStationCatalog(catalog);
var nearest = DwdWeatherService.FindNearestStation(stations, 50.1, 8.7);
Assert.Equal(2, stations.Count);
Assert.Equal("10641", nearest!.Id);
Assert.Equal("OFFENBACH-WETTERPARK", nearest.Name);
}
[Fact]
public void ParseMosmix_KonvertiertEinheitenUndBehaeltFehlwerteAlsNull()
{
var now = DateTime.UtcNow.AddHours(1).ToString("yyyy-MM-dd'T'HH:00:00.000'Z'");
var kml = $$"""
2026-08-23T15:00:00Z
{{now}}
293.15
5
-
1.25
67.6
1800
75
61
""";
var parsed = DwdWeatherService.ParseMosmix(Zip("forecast.kml", kml));
var hour = Assert.Single(parsed.Hours);
Assert.Equal(20, hour.TemperatureC);
Assert.Equal(18, hour.WindSpeedKmh);
Assert.Null(hour.WindGustKmh);
Assert.Equal(1.3, hour.PrecipitationMm);
Assert.Equal(68, hour.PrecipitationProbabilityPercent);
Assert.Equal(30, hour.SunshineDurationMinutes);
Assert.Equal(61, hour.WeatherCode);
}
[Fact]
public void ParseMosmix_LiefertMehrAlsDreiTageFuerFolgewoche()
{
var start = DateTime.UtcNow.AddHours(1);
var timeSteps = string.Join("", Enumerable.Range(0, 100)
.Select(i => $"{start.AddHours(i):yyyy-MM-dd'T'HH:mm:ss'Z'}"));
var values = string.Join(' ', Enumerable.Repeat("293.15", 100));
var kml = $$"""
{{timeSteps}}
{{values}}
""";
var parsed = DwdWeatherService.ParseMosmix(Zip("forecast.kml", kml));
Assert.Equal(100, parsed.Hours.Count);
}
[Fact]
public void ParseCapArchive_OrdnetWarnpolygonGeografischZu()
{
var xml = """
warnung-1Actual
de-DEGEWITTERSevere
2026-08-23T18:00:00Z2099-08-23T20:00:00Z
Amtliche WarnungTest
50.0,8.0 50.0,9.0 51.0,9.0 51.0,8.0 50.0,8.0
""";
var warning = Assert.Single(DwdWeatherService.ParseCapArchive(
Zip("warning.xml", xml), DateTime.UtcNow));
Assert.True(DwdWeatherService.PointInPolygon(warning.Polygons[0], 50.5, 8.5));
Assert.False(DwdWeatherService.PointInPolygon(warning.Polygons[0], 52.0, 8.5));
Assert.Equal("GEWITTER", warning.Warning.Event);
}
private static byte[] Zip(string fileName, string content)
{
using var memory = new MemoryStream();
using (var archive = new ZipArchive(memory, ZipArchiveMode.Create, leaveOpen: true))
{
var entry = archive.CreateEntry(fileName);
using var writer = new StreamWriter(entry.Open(), new UTF8Encoding(false));
writer.Write(content);
}
return memory.ToArray();
}
}