Improve slider integration tests.

They are now failing due to #11015.

samples/IntegrationTestApp/MainWindow.axaml

@@ -170,10 +170,21 @@
           </StackPanel>
         </Grid>
       </TabItem>
-      <TabItem Header="SliderTab">
-          <Slider VerticalAlignment="Top" Name="Slider" Value="30"/>
+      
+      <TabItem Header="Slider">
+          <DockPanel>
+            <DockPanel DockPanel.Dock="Top">
+              <TextBox Name="HorizontalSliderValue"
+                       DockPanel.Dock="Right"
+                       Text="{Binding #HorizontalSlider.Value, Mode=OneWay, StringFormat=\{0:0\}}"
+                       VerticalAlignment="Top"/>
+              <Slider Name="HorizontalSlider" Value="50"/>
+            </DockPanel>
+            <Button Name="ResetSliders">Reset</Button>
+          </DockPanel>
       </TabItem>
-      <TabItem Header="ScrollBarTab">
+      
+      <TabItem Header="ScrollBar">
         <ScrollBar Name="MyScrollBar" Orientation="Horizontal" AllowAutoHide="False" Width="200" Height="30" Value="20"/>
       </TabItem>
     </TabControl>

samples/IntegrationTestApp/MainWindow.axaml.cs

@@ -270,6 +270,8 @@ namespace IntegrationTestApp
                 this.Get<ListBox>("BasicListBox").SelectedIndex = -1;
             if (source?.Name == "MenuClickedMenuItemReset")
                 this.Get<TextBlock>("ClickedMenuItem").Text = "None";
+            if (source?.Name == "ResetSliders")
+                this.Get<Slider>("HorizontalSlider").Value = 50;
             if (source?.Name == "ShowTransparentWindow")
                 ShowTransparentWindow();
             if (source?.Name == "ShowTransparentPopup")

tests/Avalonia.IntegrationTests.Appium/ScrollBarTests.cs

@@ -13,7 +13,7 @@ namespace Avalonia.IntegrationTests.Appium
             _session = fixture.Session;
 
             var tabs = _session.FindElementByAccessibilityId("MainTabs");
-            var tab = tabs.FindElementByName("ScrollBarTab");
+            var tab = tabs.FindElementByName("ScrollBar");
             tab.Click();
         }
 

tests/Avalonia.IntegrationTests.Appium/SliderTests.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Globalization;
 using OpenQA.Selenium.Appium;
 using OpenQA.Selenium.Interactions;
 using Xunit;
@@ -15,21 +16,95 @@ namespace Avalonia.IntegrationTests.Appium
             _session = fixture.Session;
 
             var tabs = _session.FindElementByAccessibilityId("MainTabs");
-            var tab = tabs.FindElementByName("SliderTab");
+            var tab = tabs.FindElementByName("Slider");
             tab.Click();
+
+            var reset = _session.FindElementByAccessibilityId("ResetSliders");
+            reset.Click();
+        }
+
+        [Fact]
+        public void Horizontal_Changes_Value_Dragging_Thumb_Right()
+        {
+            var slider = _session.FindElementByAccessibilityId("HorizontalSlider");
+            var thumb = slider.FindElementByAccessibilityId("thumb");
+            var initialThumbRect = thumb.Rect;
+
+            new Actions(_session).ClickAndHold(thumb).MoveByOffset(100, 0).Release().Perform();
+
+            var value = Math.Round(double.Parse(slider.Text, CultureInfo.InvariantCulture));
+            var boundValue = double.Parse(
+                _session.FindElementByAccessibilityId("HorizontalSliderValue").Text,
+                CultureInfo.InvariantCulture);
+
+            Assert.True(value > 50);
+            Assert.Equal(value, boundValue);
+
+            var currentThumbRect = thumb.Rect;
+            Assert.True(currentThumbRect.Left > initialThumbRect.Left);
+        }
+
+        [Fact]
+        public void Horizontal_Changes_Value_Dragging_Thumb_Left()
+        {
+            var slider = _session.FindElementByAccessibilityId("HorizontalSlider");
+            var thumb = slider.FindElementByAccessibilityId("thumb");
+            var initialThumbRect = thumb.Rect;
+
+            new Actions(_session).ClickAndHold(thumb).MoveByOffset(-100, 0).Release().Perform();
+
+            var value = Math.Round(double.Parse(slider.Text, CultureInfo.InvariantCulture));
+            var boundValue = double.Parse(
+                _session.FindElementByAccessibilityId("HorizontalSliderValue").Text,
+                CultureInfo.InvariantCulture);
+
+            Assert.True(value < 50);
+            Assert.Equal(value, boundValue);
+
+            var currentThumbRect = thumb.Rect;
+            Assert.True(currentThumbRect.Left < initialThumbRect.Left);
         }
 
         [Fact]
-        public void Changes_Value_When_Clicking_Increase_Button()
+        public void Horizontal_Changes_Value_When_Clicking_Increase_Button()
         {
-            var slider = _session.FindElementByAccessibilityId("Slider");
+            var slider = _session.FindElementByAccessibilityId("HorizontalSlider");
+            var thumb = slider.FindElementByAccessibilityId("thumb");
+            var initialThumbRect = thumb.Rect;
+
+            new Actions(_session).MoveToElement(slider).MoveByOffset(100, 0).Click().Perform();
+
+            var value = Math.Round(double.Parse(slider.Text, CultureInfo.InvariantCulture));
+            var boundValue = double.Parse(
+                _session.FindElementByAccessibilityId("HorizontalSliderValue").Text,
+                CultureInfo.InvariantCulture);
+
+            Assert.True(value > 50);
+            Assert.Equal(value, boundValue);
+
+            var currentThumbRect = thumb.Rect;
+            Assert.True(currentThumbRect.Left > initialThumbRect.Left);
+        }
+
+        [Fact]
+        public void Horizontal_Changes_Value_When_Clicking_Decrease_Button()
+        {
+            var slider = _session.FindElementByAccessibilityId("HorizontalSlider");
+            var thumb = slider.FindElementByAccessibilityId("thumb");
+            var initialThumbRect = thumb.Rect;
+
+            new Actions(_session).MoveToElement(slider).MoveByOffset(-100, 0).Click().Perform();
 
-            // slider.Text gets the Slider value
-            Assert.True(double.Parse(slider.Text) == 30);
+            var value = Math.Round(double.Parse(slider.Text, CultureInfo.InvariantCulture));
+            var boundValue = double.Parse(
+                _session.FindElementByAccessibilityId("HorizontalSliderValue").Text,
+                CultureInfo.InvariantCulture);
 
-            new Actions(_session).Click(slider).Perform();
+            Assert.True(value < 50);
+            Assert.Equal(value, boundValue);
 
-            Assert.Equal(50, Math.Round(double.Parse(slider.Text)));
+            var currentThumbRect = thumb.Rect;
+            Assert.True(currentThumbRect.Left < initialThumbRect.Left);
         }
     }
 }