Added failing tests for #2372.

tests/Avalonia.Controls.UnitTests/Primitives/RangeBaseTests.cs

@@ -8,6 +8,7 @@ using Avalonia.Controls.Templates;
 using Avalonia.Data;
 using Avalonia.Markup.Data;
 using Avalonia.Styling;
+using Avalonia.UnitTests;
 using Xunit;
 
 namespace Avalonia.Controls.UnitTests.Primitives
@@ -160,6 +161,38 @@ namespace Avalonia.Controls.UnitTests.Primitives
             Assert.Equal(expected, track.Value);
         }
 
+        [Fact]
+        public void Coercion_Should_Not_Be_Done_During_Initialization()
+        {
+            var target = new TestRange();
+
+            target.BeginInit();
+
+            var root = new TestRoot(target);
+            target.Minimum = 1;
+            Assert.Equal(0, target.Value);
+
+            target.Value = 50;
+            target.EndInit();
+
+            Assert.Equal(50, target.Value);
+        }
+
+        [Fact]
+        public void Coercion_Should_Be_Done_After_Initialization()
+        {
+            var target = new TestRange();
+
+            target.BeginInit();
+
+            var root = new TestRoot(target);
+            target.Minimum = 1;
+
+            target.EndInit();
+
+            Assert.Equal(1, target.Value);
+        }
+
         private class TestRange : RangeBase
         {
         }
@@ -199,4 +232,4 @@ namespace Avalonia.Controls.UnitTests.Primitives
             }
         }
     }
-}
+}

tests/Avalonia.Markup.Xaml.UnitTests/Xaml/BasicTests.cs

@@ -907,6 +907,25 @@ do we need it?")]
             }
         }
 
+        [Fact]
+        public void Slider_Properties_Can_Be_Set_In_Any_Order()
+        {
+            using (UnitTestApplication.Start(TestServices.MockWindowingPlatform))
+            {
+                var xaml = @"
+<Window xmlns='https://github.com/avaloniaui'>
+    <Slider Width='400' Value='500' Minimum='0' Maximum='1000'/>
+</Window>";
+
+                var window = AvaloniaXamlLoader.Parse<Window>(xaml);
+                var slider = (Slider)window.Content;
+
+                Assert.Equal(0, slider.Minimum);
+                Assert.Equal(1000, slider.Maximum);
+                Assert.Equal(500, slider.Value);
+            }
+        }
+
         private class SelectedItemsViewModel : INotifyPropertyChanged
         {
             public string[] Items { get; set; }