1 files changed, 79 insertions, 0 deletions
diff --git a/Plugins/MonoGame.Extended/tests/MonoGame.Extended.Tests/BitmapFonts/BitmapFontTests.cs b/Plugins/MonoGame.Extended/tests/MonoGame.Extended.Tests/BitmapFonts/BitmapFontTests.cs
new file mode 100644
index 0000000..8f751bc
--- /dev/null
+++ b/Plugins/MonoGame.Extended/tests/MonoGame.Extended.Tests/BitmapFonts/BitmapFontTests.cs
@@ -0,0 +1,79 @@
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using MonoGame.Extended.BitmapFonts;
+using MonoGame.Extended.TextureAtlases;
+using Xunit;
+
+namespace MonoGame.Extended.Tests.BitmapFonts
+{
+    public class BitmapFontTests
+    {
+        [Fact]
+        public void BitmapFont_Constructor_Test()
+        {
+            var font = CreateTestFont();
+
+            Assert.Equal("Impact", font.Name);
+            Assert.Equal(22, font.LineHeight);
+        }
+
+        [Fact]
+        public void BitmapFont_MeasureString_SingleWord_Test()
+        {
+            var font = CreateTestFont();
+            var size = font.MeasureString("fox");
+
+            Assert.Equal(40, size.Width);
+            Assert.Equal(font.LineHeight, size.Height);
+        }
+
+        [Fact]
+        public void BitmapFont_MeasureString_WithLetterSpacing_Test()
+        {
+            var font = CreateTestFont();
+            font.LetterSpacing = 3;
+
+            var size = font.MeasureString("fox");
+
+            Assert.Equal(46, size.Width);
+            Assert.Equal(size.Height, font.LineHeight);
+        }
+
+        [Fact]
+        public void BitmapFont_MeasureString_MultipleLines_Test()
+        {
+            var font = CreateTestFont();
+            var size = font.MeasureString("box fox\nbox of fox");
+
+            Assert.Equal(123, size.Width);
+            Assert.Equal(size.Height, font.LineHeight * 2);
+        }
+
+        [Fact]
+        public void BitmapFont_MeasureString_EmptyString_Test()
+        {
+            var font = CreateTestFont();
+            var size = font.MeasureString(string.Empty);
+
+            Assert.Equal(0, size.Width);
+            Assert.Equal(0, size.Height);
+        }
+
+        private static BitmapFont CreateTestFont()
+        {
+            var textureRegion = new TextureRegion2D(null, x: 219, y: 61, width: 16, height: 18);
+            var regions = new[]
+            {
+                // extracted from 'Impact' font. 'x' is particularly interesting because it has a negative x offset
+                new BitmapFontRegion(textureRegion, character: ' ', xOffset: 0, yOffset: 0, xAdvance: 6),
+                new BitmapFontRegion(textureRegion, character: 'b', xOffset: 0, yOffset: 7, xAdvance: 17),
+                new BitmapFontRegion(textureRegion, character: 'f', xOffset: 0, yOffset: 7, xAdvance: 9),
+                new BitmapFontRegion(textureRegion, character: 'o', xOffset: 0, yOffset: 11, xAdvance: 16),
+                new BitmapFontRegion(textureRegion, character: 'x', xOffset: -1, yOffset: 11, xAdvance: 13),
+            };
+
+            var font = new BitmapFont("Impact", regions, lineHeight: 22);
+            return font;
+        }
+    }
+}