using System.IO.Compression;
using TileServer.Domain.Tiles;

namespace TileServer.UnitTests;

public sealed class TileDataTests
{
    [Fact]
    public void Uncompressed_ReturnsRawBytesWhenNotGzipped()
    {
        var payload = new byte[] { 0x1A, 0x2B, 0x3C };
        var tile = new TileData(payload, false);

        Assert.Same(payload, tile.Uncompressed());
    }

    [Fact]
    public void Uncompressed_InflatesGzipPayload()
    {
        var raw = "mvt-payload"u8.ToArray();
        using var buffer = new MemoryStream();
        using (var gzip = new GZipStream(buffer, CompressionLevel.SmallestSize, leaveOpen: true))
        {
            gzip.Write(raw);
        }

        var tile = new TileData(buffer.ToArray(), true);
        Assert.True(TileData.IsGzip(tile.Bytes));
        Assert.Equal(raw, tile.Uncompressed());
    }
}