Add WindowsBase tests

Author: hughbe

Microsoft.Dotnet.Wpf.sln

@@ -249,6 +249,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "UnitTests", "UnitTests", "{
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.Xaml.Tests", "src\Microsoft.DotNet.Wpf\tests\UnitTests\System.Xaml.Tests\System.Xaml.Tests.csproj", "{B2F2A89C-55C9-41B1-A645-0948609BD8BE}"
 EndProject
+Project("{6FFF8BB3-74D1-4860-BEF1-5B307BCDBB95}") = "WindowsBase.Tests", "src\Microsoft.DotNet.Wpf\tests\UnitTests\WindowsBase.Tests\WindowsBase.Tests.csproj", "{A5DC575D-EC10-445B-94C1-98015F926FFA}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -1942,6 +1944,28 @@ Global
 		{B2F2A89C-55C9-41B1-A645-0948609BD8BE}.Release|x86.ActiveCfg = Release|Win32
 		{B2F2A89C-55C9-41B1-A645-0948609BD8BE}.Release|x86.Build.0 = Release|Win32
 		{B2F2A89C-55C9-41B1-A645-0948609BD8BE}.Release|x86.Deploy.0 = Release|Win32
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Debug|Any CPU.ActiveCfg = Debug|Win32
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Debug|Any CPU.Build.0 = Debug|Win32
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Debug|Any CPU.Deploy.0 = Debug|Win32
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Debug|ARM64.ActiveCfg = Debug|ARM64
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Debug|ARM64.Build.0 = Debug|ARM64
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Debug|x64.ActiveCfg = Debug|x64
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Debug|x64.Build.0 = Debug|x64
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Debug|x64.Deploy.0 = Debug|x64
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Debug|x86.ActiveCfg = Debug|Win32
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Debug|x86.Build.0 = Debug|Win32
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Debug|x86.Deploy.0 = Debug|Win32
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Release|Any CPU.ActiveCfg = Release|Win32
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Release|Any CPU.Build.0 = Release|Win32
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Release|Any CPU.Deploy.0 = Release|Win32
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Release|ARM64.ActiveCfg = Release|ARM64
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Release|ARM64.Build.0 = Release|ARM64
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Release|x64.ActiveCfg = Release|x64
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Release|x64.Build.0 = Release|x64
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Release|x64.Deploy.0 = Release|x64
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Release|x86.ActiveCfg = Release|Win32
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Release|x86.Build.0 = Release|Win32
+		{A5DC575D-EC10-445B-94C1-98015F926FFA}.Release|x86.Deploy.0 = Release|Win32
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -2062,6 +2086,7 @@ Global
 		{34B64A4A-7C83-4F92-8C47-80E9FA10D660} = {C9ECC1A1-917F-43D3-B340-2035B4938507}
 		{A48B585E-6AB0-4F8D-8484-77F37CB44437} = {34B64A4A-7C83-4F92-8C47-80E9FA10D660}
 		{B2F2A89C-55C9-41B1-A645-0948609BD8BE} = {A48B585E-6AB0-4F8D-8484-77F37CB44437}
+		{A5DC575D-EC10-445B-94C1-98015F926FFA} = {A48B585E-6AB0-4F8D-8484-77F37CB44437}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {B4340004-DAC0-497D-B69D-CFA7CD93F567}

src/Microsoft.DotNet.Wpf/tests/UnitTests/WindowsBase.Tests/Helpers.cs

@@ -0,0 +1,125 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Collections.Specialized;
+using System.ComponentModel;
+using System.IO;
+using System.Runtime.ExceptionServices;
+using System.Text;
+using System.Threading;
+using System.Windows;
+using System.Windows.Media;
+using Xunit.Sdk;
+
+public static class Helpers
+{
+#pragma warning disable xUnit1013
+    public static string GetResourcePath(string name) => Path.GetFullPath(Path.Combine("Resources", name));
+
+    public static void ExecuteOnDifferentThread(Action action, ApartmentState? state = null)
+    {
+        ExceptionDispatchInfo? edi = null;
+        var t = new Thread(() =>
+        {
+            try
+            {
+                action();
+            }
+            catch (Exception e)
+            {
+                edi = ExceptionDispatchInfo.Capture(e);
+            }
+        });
+        if (state is not null)
+        {
+            t.SetApartmentState(state.Value);
+        }
+        t.Start();
+        t.Join();
+
+        if (edi is not null)
+        {
+            edi.Throw();
+        }
+    }
+    
+    public static T ExecuteOnDifferentThread<T>(Func<T> action, ApartmentState? state = null)
+    {
+        T? result = default;
+        ExceptionDispatchInfo? edi = null;
+        var t = new Thread(() =>
+        {
+            try
+            {
+                result = action();
+            }
+            catch (Exception e)
+            {
+                edi = ExceptionDispatchInfo.Capture(e);
+            }
+        });
+        if (state is not null)
+        {
+            t.SetApartmentState(state.Value);
+        }
+        t.Start();
+        t.Join();
+
+        if (edi is not null)
+        {
+            edi.Throw();
+            throw new Exception("Not reachable.");
+        }
+        else
+        {
+            return result!;
+        }
+    }
+    
+    public static void AssertEqualRounded(Matrix expected, Matrix actual, int precision = 5)
+    {
+        if (expected.Equals(actual))
+        {
+            return;
+        }
+
+        try
+        {
+            Assert.Equal(expected.M11, actual.M11, precision);
+            Assert.Equal(expected.M12, actual.M12, precision);
+            Assert.Equal(expected.M21, actual.M21, precision);
+            Assert.Equal(expected.M22, actual.M22, precision);
+            Assert.Equal(expected.OffsetX, actual.OffsetX, precision);
+            Assert.Equal(expected.OffsetY, actual.OffsetY, precision);
+        }
+        catch (Exception)
+        {
+            // Throw main AssertException with formatting.
+            //Assert.Equal(expected, actual);
+        }
+    }
+
+    public static void AssertEqualRounded(Rect expected, Rect actual, int precision)
+    {
+        if (expected.Equals(actual))
+        {
+            return;
+        }
+
+        try
+        {
+            Assert.Equal(expected.X, actual.X, precision);
+            Assert.Equal(expected.Y, actual.Y, precision);
+            Assert.Equal(expected.Width, actual.Width, precision);
+            Assert.Equal(expected.Height, actual.Height, precision);
+        }
+        catch (Exception)
+        {
+            // Throw main AssertException with formatting.
+            Assert.Equal(expected, actual);
+        }
+    }
+#pragma warning restore xUnit1013
+}