Provide a RenderInterface for controls which use shapes.

tests/Avalonia.Controls.UnitTests/CanvasTests.cs

@@ -1,5 +1,6 @@
 using System;
 using Avalonia.Controls.Shapes;
+using Avalonia.UnitTests;
 using Xunit;
 
 namespace Avalonia.Controls.UnitTests
@@ -9,6 +10,8 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Left_Property_Should_Work()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             Rectangle rect;
             var target = new Canvas
             {
@@ -34,6 +37,8 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Top_Property_Should_Work()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             Rectangle rect;
             var target = new Canvas
             {
@@ -59,6 +64,8 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Right_Property_Should_Work()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             Rectangle rect;
             var target = new Canvas
             {
@@ -84,6 +91,8 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Bottom_Property_Should_Work()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             Rectangle rect;
             var target = new Canvas
             {

tests/Avalonia.Controls.UnitTests/LayoutTransformControlTests.cs

@@ -1,5 +1,6 @@
 using Avalonia.Controls.Shapes;
 using Avalonia.Media;
+using Avalonia.UnitTests;
 using Xunit;
 
 namespace Avalonia.Controls.UnitTests
@@ -171,6 +172,8 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Should_Generate_RotateTransform_90_degrees()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             LayoutTransformControl lt = CreateWithChildAndMeasureAndTransform(
                                         100,
                                         25,
@@ -193,6 +196,8 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Should_Generate_RotateTransform_minus_90_degrees()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             LayoutTransformControl lt = CreateWithChildAndMeasureAndTransform(
                                         100,
                                         25,
@@ -215,6 +220,8 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Should_Generate_ScaleTransform_x2()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             LayoutTransformControl lt = CreateWithChildAndMeasureAndTransform(
                                         100,
                                         50,
@@ -236,6 +243,8 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Should_Generate_SkewTransform_45_degrees()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             LayoutTransformControl lt = CreateWithChildAndMeasureAndTransform(
                                         100,
                                         100,
@@ -258,6 +267,8 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Should_Generate_SkewTransform_minus_45_degrees()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             LayoutTransformControl lt = CreateWithChildAndMeasureAndTransform(
                                         100,
                                         100,
@@ -279,6 +290,8 @@ namespace Avalonia.Controls.UnitTests
 
         private static void TransformMeasureSizeTest(Size size, Transform transform, Size expectedSize)
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             LayoutTransformControl lt = CreateWithChildAndMeasureAndTransform(
                 size.Width,
                 size.Height,
@@ -292,6 +305,8 @@ namespace Avalonia.Controls.UnitTests
 
         private static void TransformRootBoundsTest(Size size, Transform transform, Rect expectedBounds)
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             LayoutTransformControl lt = CreateWithChildAndMeasureAndTransform(size.Width, size.Height, transform);
 
             Rect outBounds = lt.TransformRoot.Bounds;

tests/Avalonia.Controls.UnitTests/RelativePanelTests.cs

@@ -1,4 +1,5 @@
 using Avalonia.Controls.Shapes;
+using Avalonia.UnitTests;
 using Xunit;
 
 namespace Avalonia.Controls.UnitTests
@@ -8,6 +9,7 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Lays_Out_1_Child_Next_the_other()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
             var rect1 = new Rectangle { Height = 20, Width = 20 };
             var rect2 = new Rectangle { Height = 20, Width = 20 };
 
@@ -34,6 +36,7 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Lays_Out_1_Child_Below_the_other()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
             var rect1 = new Rectangle { Height = 20, Width = 20 };
             var rect2 = new Rectangle { Height = 20, Width = 20 };
 
@@ -60,6 +63,7 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void RelativePanel_Can_Center()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
             var rect1 = new Rectangle { Height = 20, Width = 20 };
             var rect2 = new Rectangle { Height = 20, Width = 20 };
 
@@ -86,6 +90,7 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void LeftOf_Measures_Correctly()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
             var rect1 = new Rectangle { Height = 20, Width = 20 };
             var rect2 = new Rectangle { Height = 20, Width = 20 };
 
@@ -111,6 +116,7 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Above_Measures_Correctly()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
             var rect1 = new Rectangle { Height = 20, Width = 20 };
             var rect2 = new Rectangle { Height = 20, Width = 20 };
 

tests/Avalonia.Controls.UnitTests/ViewboxTests.cs

@@ -1,5 +1,6 @@
 using Avalonia.Controls.Shapes;
 using Avalonia.Media;
+using Avalonia.UnitTests;
 using Xunit;
 
 namespace Avalonia.Controls.UnitTests
@@ -9,6 +10,8 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Viewbox_Stretch_Uniform_Child()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             var target = new Viewbox() { Child = new Rectangle() { Width = 100, Height = 50 } };
 
             target.Measure(new Size(200, 200));
@@ -25,6 +28,8 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Viewbox_Stretch_None_Child()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             var target = new Viewbox() { Stretch = Stretch.None, Child = new Rectangle() { Width = 100, Height = 50 } };
 
             target.Measure(new Size(200, 200));
@@ -41,6 +46,8 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Viewbox_Stretch_Fill_Child()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             var target = new Viewbox() { Stretch = Stretch.Fill, Child = new Rectangle() { Width = 100, Height = 50 } };
 
             target.Measure(new Size(200, 200));
@@ -57,6 +64,8 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Viewbox_Stretch_UniformToFill_Child()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             var target = new Viewbox() { Stretch = Stretch.UniformToFill, Child = new Rectangle() { Width = 100, Height = 50 } };
 
             target.Measure(new Size(200, 200));
@@ -73,6 +82,8 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Viewbox_Stretch_Uniform_Child_With_Unrestricted_Width()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             var target = new Viewbox() { Child = new Rectangle() { Width = 100, Height = 50 } };
 
             target.Measure(new Size(double.PositiveInfinity, 200));
@@ -89,6 +100,8 @@ namespace Avalonia.Controls.UnitTests
         [Fact]
         public void Viewbox_Stretch_Uniform_Child_With_Unrestricted_Height()
         {
+            using var app = UnitTestApplication.Start(TestServices.MockPlatformRenderInterface);
+
             var target = new Viewbox() { Child = new Rectangle() { Width = 100, Height = 50 } };
 
             target.Measure(new Size(200, double.PositiveInfinity));