Misc unit test fixes

* FontTests.cs: Added test for font weight rendering

* LabelTests.cs: Minor unit test issue

* Label.AlignCenterWrappedChangeText.png: Update test images

* TransformTests.cs: Use a bigger delta when comparing results,
  required for Mac.

6 files changed, 22 insertions, 2 deletions

diff --git a/Testing/GtkTestRunner/ReferenceImages/Label.AlignCenterWrappedChangeText.png b/Testing/GtkTestRunner/ReferenceImages/Label.AlignCenterWrappedChangeText.png
index f1398bc9..08dfe2eb 100644
--- a/Testing/GtkTestRunner/ReferenceImages/Label.AlignCenterWrappedChangeText.png
+++ b/Testing/GtkTestRunner/ReferenceImages/Label.AlignCenterWrappedChangeText.png
diff --git a/Testing/MacTestRunner/ReferenceImages/Label.AlignCenterWrappedChangeText.png b/Testing/MacTestRunner/ReferenceImages/Label.AlignCenterWrappedChangeText.png
index 7d2660e6..edea2d19 100644
--- a/Testing/MacTestRunner/ReferenceImages/Label.AlignCenterWrappedChangeText.png
+++ b/Testing/MacTestRunner/ReferenceImages/Label.AlignCenterWrappedChangeText.png
diff --git a/Testing/Tests/FontTests.cs b/Testing/Tests/FontTests.cs
index be62198a..5c306348 100644
--- a/Testing/Tests/FontTests.cs
+++ b/Testing/Tests/FontTests.cs
@@ -31,7 +31,7 @@ using Xwt.Drawing;
 namespace Xwt
 {
 	[TestFixture]
-	public class FontTests
+	public class FontTests: DrawingTestsBase
 	{
 		[Test]
 		public void FromNameEmpty ()
@@ -228,6 +228,25 @@ namespace Xwt
 			var f2 = Font.FromName ("Arial expanded Oblique Light 33");
 			Assert.IsTrue (f1.Equals (f2));
 		}
+
+		[Test]
+		public void RenderWeight ()
+		{
+			var font = "Avenir Next";
+
+			InitBlank (150, 200);
+			TextLayout la = new TextLayout ();
+			double y = 0;
+
+			foreach (FontWeight w in Enum.GetValues (typeof(FontWeight))) {
+				la.Font = Font.FromName (font).WithSize (20).WithWeight (w);
+				la.Text = "Test " + w.ToString ();
+				context.DrawTextLayout (la, 0, y + 3);
+				y += la.GetSize ().Height;
+			}
+
+			CheckImage ("FontTests.RenderWeight.png");
+		}
 	}
 }
 
diff --git a/Testing/Tests/LabelTests.cs b/Testing/Tests/LabelTests.cs
index abb168dd..601237b5 100644
--- a/Testing/Tests/LabelTests.cs
+++ b/Testing/Tests/LabelTests.cs
@@ -72,6 +72,7 @@ namespace Xwt
 			la.TextAlignment = Alignment.Center;
 			la.Wrap = WrapMode.Word;
 			la.WidthRequest = 200;
+			la.BackgroundColor = Xwt.Drawing.Colors.LightGray;
 
 			using (var win = new Window { Width = 200, Height = 100 }) {
 				win.Content = la;
diff --git a/Testing/Tests/ReferenceImages/Label.AlignCenterWrappedChangeText.png b/Testing/Tests/ReferenceImages/Label.AlignCenterWrappedChangeText.png
index f1398bc9..08dfe2eb 100644
--- a/Testing/Tests/ReferenceImages/Label.AlignCenterWrappedChangeText.png
+++ b/Testing/Tests/ReferenceImages/Label.AlignCenterWrappedChangeText.png
diff --git a/Testing/Tests/TransformTests.cs b/Testing/Tests/TransformTests.cs
index 92c07c85..e4a7a94b 100644
--- a/Testing/Tests/TransformTests.cs
+++ b/Testing/Tests/TransformTests.cs
@@ -44,7 +44,7 @@ namespace Xwt
 		// There is only a single context used in all tests,
 		// so it MUST be Saved and Restored for each test.
 
-		const double DELTA = 0.000000001d;
+		const double DELTA = 0.000001d;
 
 		ImageBuilder ib = null;
 		Context context = null;