Use Name for AutomationId.

samples/IntegrationTestApp/MainWindow.axaml

@@ -5,16 +5,24 @@
         mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
         x:Class="IntegrationTestApp.MainWindow"
         Title="IntegrationTestApp">
-  <TabControl TabStripPlacement="Left" AutomationProperties.AutomationId="MainTabs">
+  <TabControl TabStripPlacement="Left" Name="MainTabs">
+    <TabItem Header="Automation">
+      <StackPanel>
+        <TextBlock Name="TextBlockWithName">TextBlockWithName</TextBlock>
+        <TextBlock Name="NotTheAutomationId" AutomationProperties.AutomationId="TextBlockWithNameAndAutomationId">
+          TextBlockWithNameAndAutomationId
+        </TextBlock>
+      </StackPanel>
+    </TabItem>
     <TabItem Header="Button">
       <StackPanel>
-        <Button AutomationProperties.AutomationId="DisabledButton" IsEnabled="False">
+        <Button Name="DisabledButton" IsEnabled="False">
           Disabled Button
         </Button>
-        <Button AutomationProperties.AutomationId="BasicButton">
+        <Button Name="BasicButton">
           Basic Button
         </Button>
-        <Button AutomationProperties.AutomationId="ButtonWithTextBlock">
+        <Button Name="ButtonWithTextBlock">
           <TextBlock>Button with TextBlock</TextBlock>
         </Button>
       </StackPanel>
@@ -22,23 +30,23 @@
 
     <TabItem Header="CheckBox">
       <StackPanel>
-        <CheckBox AutomationProperties.AutomationId="UncheckedCheckBox">Unchecked</CheckBox>
-        <CheckBox AutomationProperties.AutomationId="CheckedCheckBox" IsChecked="True">Checked</CheckBox>
-        <CheckBox AutomationProperties.AutomationId="ThreeStateCheckBox" IsThreeState="True" IsChecked="{x:Null}">ThreeState</CheckBox>
+        <CheckBox Name="UncheckedCheckBox">Unchecked</CheckBox>
+        <CheckBox Name="CheckedCheckBox" IsChecked="True">Checked</CheckBox>
+        <CheckBox Name="ThreeStateCheckBox" IsThreeState="True" IsChecked="{x:Null}">ThreeState</CheckBox>
       </StackPanel>
     </TabItem>
-      
+
     <TabItem Header="ComboBox">
       <StackPanel>
-        <ComboBox AutomationProperties.AutomationId="UnselectedComboBox">
+        <ComboBox Name="UnselectedComboBox">
           <ComboBoxItem>Foo</ComboBoxItem>
           <ComboBoxItem>Bar</ComboBoxItem>
         </ComboBox>
-        <ComboBox AutomationProperties.AutomationId="SelectedIndex0ComboBox" SelectedIndex="0">
+        <ComboBox Name="SelectedIndex0ComboBox" SelectedIndex="0">
           <ComboBoxItem>Foo</ComboBoxItem>
           <ComboBoxItem>Bar</ComboBoxItem>
         </ComboBox>
-        <ComboBox AutomationProperties.AutomationId="SelectedIndex1ComboBox" SelectedIndex="1">
+        <ComboBox Name="SelectedIndex1ComboBox" SelectedIndex="1">
           <ComboBoxItem>Foo</ComboBoxItem>
           <ComboBoxItem>Bar</ComboBoxItem>
         </ComboBox>

src/Avalonia.Controls/Automation/Peers/ControlAutomationPeer.cs

@@ -43,7 +43,7 @@ namespace Avalonia.Automation.Peers
         }
 
         protected override void BringIntoViewCore() => Owner.BringIntoView();
-        protected override string? GetAutomationIdCore() => AutomationProperties.GetAutomationId(Owner);
+        protected override string? GetAutomationIdCore() => AutomationProperties.GetAutomationId(Owner) ?? Owner.Name;
         protected override Rect GetBoundingRectangleCore() => GetBounds(Owner.TransformedBounds);
 
         protected virtual IReadOnlyList<AutomationPeer>? GetChildrenCore()

tests/Avalonia.IntegrationTests.Win32/AutomationTests.cs

@@ -0,0 +1,29 @@
+using OpenQA.Selenium.Appium.Windows;
+using Xunit;
+
+namespace Avalonia.IntegrationTests.Win32
+{
+    [Collection("Default")]
+    public class AutomationTests
+    {
+        private WindowsDriver<WindowsElement> _session;
+
+        public AutomationTests(TestAppFixture fixture)
+        {
+            _session = fixture.Session;
+
+            var tabs = _session.FindElementByAccessibilityId("MainTabs");
+            var tab = tabs.FindElementByName("Automation");
+            tab.Click();
+        }
+
+        [Fact]
+        public void AutomationId()
+        {
+            // AutomationID can be specified by the Name or AutomationProperties.AutomationId
+            // properties, with the latter taking precedence.
+            var byName = _session.FindElementByAccessibilityId("TextBlockWithName");
+            var byAutomationId = _session.FindElementByAccessibilityId("TextBlockWithNameAndAutomationId");
+        }
+    }
+}