feat(proj): init

tests/TileServer.UnitTests/TileCoordinateTests.cs

@@ -0,0 +1,49 @@
+using TileServer.Domain;
+using TileServer.Domain.Tiles;
+
+namespace TileServer.UnitTests;
+
+public sealed class TileCoordinateTests
+{
+    [Fact]
+    public void Ancestor_ShiftsToParentZoom()
+    {
+        var child = new TileCoordinate(3, 5, 6);
+        Assert.Equal(new TileCoordinate(1, 1, 1), child.Ancestor(1));
+        Assert.Equal(child, child.Ancestor(3));
+    }
+
+    [Fact]
+    public void ToTmsY_FlipsXyzOrigin()
+    {
+        var tile = new TileCoordinate(3, 1, 0);
+        Assert.Equal(7, tile.ToTmsY());
+    }
+
+    [Fact]
+    public void ClampMaxZoom_CapsAtPlanetilerLimit()
+    {
+        Assert.Equal(15, PlanetilerLimits.ClampMaxZoom(18));
+        Assert.Equal(15, PlanetilerLimits.ClampMaxZoom(15));
+        Assert.Equal(0, PlanetilerLimits.ClampMaxZoom(-1));
+    }
+
+    [Theory]
+    [InlineData(0, 0, 0, true)]
+    [InlineData(1, 2, 0, false)]
+    [InlineData(-1, 0, 0, false)]
+    public void IsValid_RespectsZoomBounds(int z, int x, int y, bool expected)
+        => Assert.Equal(expected, new TileCoordinate(z, x, y).IsValid);
+}
+
+public sealed class ResourceNameTests
+{
+    [Theory]
+    [InlineData("central-fed-district", true)]
+    [InlineData("osm-bright", true)]
+    [InlineData("Dark", false)]
+    [InlineData("1south", false)]
+    [InlineData("", false)]
+    public void IsValid_AcceptsLowercaseIds(string value, bool expected)
+        => Assert.Equal(expected, ResourceName.IsValid(value));
+}