(#63) WpfTeXFormulaExtensions: document and add tests

src/WpfMath.Tests/RenderingTests.fs

@@ -1,5 +1,7 @@
 module WpfMath.Tests.RenderingTests
 
+open System.Windows.Media
+
 open Xunit
 
 open WpfMath.Parsers
@@ -8,15 +10,15 @@ open WpfMath.Rendering
 let private parser = WpfTeXFormulaParser.Instance
 
 [<Fact>]
-let ``TexRenderer.RenderToBitmap should create an image of proper size``() =
+let ``WpfTeXFormulaExtensions::RenderToBitmap should create an image of proper size``(): unit =
     let formula = parser.Parse "2+2=2"
     let environment = WpfTeXEnvironment.Create()
     let bitmap = formula.RenderToBitmap environment
     Assert.Equal(82, bitmap.PixelWidth)
     Assert.Equal(17, bitmap.PixelHeight)
 
 [<Fact>]
-let ``TexRenderer.RenderToBitmap should create an image of proper size with offset``() =
+let ``WpfTeXFormulaExtensions::RenderToBitmap should create an image of proper size with offset``(): unit =
     let formula = parser.Parse "2+2=2"
     let environment = WpfTeXEnvironment.Create()
     let margin = 50
@@ -28,11 +30,18 @@ let ``TexRenderer.RenderToBitmap should create an image of proper size with offs
     Assert.Equal(formulaHeight + (margin * 2), bitmap.PixelHeight)
 
 [<Fact>]
-let ``TexRenderer.RenderToBitmap should work with different DPI``() =
+let ``WpfTeXFormulaExtensions::RenderToBitmap should work with different DPI``(): unit =
     let formula = parser.Parse "2+2=2"
     let environment = WpfTeXEnvironment.Create()
     let bitmap = formula.RenderToBitmap(environment, dpi = 192.0)
     Assert.Equal(163, bitmap.PixelWidth)
     Assert.Equal(34, bitmap.PixelHeight)
     Assert.Equal(192.0, bitmap.DpiX)
     Assert.Equal(192.0, bitmap.DpiY)
+
+[<Fact>]
+let ``WpfTeXFormulaExtensions::RenderToGeometry should work``() =
+    let formula = parser.Parse "2+2=2"
+    let environment = WpfTeXEnvironment.Create()
+    let geometry = formula.RenderToGeometry(environment) :?> GeometryGroup
+    Assert.Equal(5, geometry.Children.Count)

src/WpfMath/Rendering/WpfTeXFormulaExtensions.cs

@@ -9,7 +9,7 @@ public static class WpfTeXFormulaExtensions
     /// <summary>Default DPI for WPF.</summary>
     private const int DefaultDpi = 96;
 
-    public static Geometry RenderToGeometry( // TODO: Tests for this method.
+    public static Geometry RenderToGeometry(
         this TexFormula formula,
         TexEnvironment environment,
         double scale = 20.0,
@@ -22,7 +22,7 @@ public static class WpfTeXFormulaExtensions
         return geometry;
     }
 
-    public static BitmapSource RenderToBitmap( // TODO: Tests for this method.
+    public static BitmapSource RenderToBitmap(
         this TexFormula formula,
         TexEnvironment environment,
         double scale = 20.0,