Add unit tests for ControlDesigner.ControlDesignerAccessibleObject (#…

…12664)

Related #10773

Proposed changes
Add unit test ControlDesigner.ControlDesignerAccessibleObjectTests.cs for public properties and method of the ControlDesigner.ControlDesignerAccessibleObject.

Enable nullability in ControlDesigner.ControlDesignerAccessibleObjectTests.cs.

src/System.Windows.Forms.Design/tests/UnitTests/System/Windows/Forms/Design/ControlDesignerAccessibleObjectTests.cs

@@ -0,0 +1,153 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+#nullable enable
+
+using Moq;
+using System.ComponentModel.Design;
+using System.Drawing;
+
+namespace System.Windows.Forms.Design.Tests;
+
+public class ControlDesignerAccessibleObjectTests : IDisposable
+{
+    private class TestControl : Control
+    {
+        private readonly AccessibleObject _accessibilityObject;
+
+        public TestControl(AccessibleObject accessibilityObject)
+        {
+            _accessibilityObject = accessibilityObject;
+        }
+
+        protected override AccessibleObject CreateAccessibilityInstance() => _accessibilityObject;
+    }
+
+    private readonly ControlDesigner _designer;
+
+    public ControlDesignerAccessibleObjectTests() => _designer = new();
+
+    public void Dispose() => _designer.Dispose();
+
+    private ControlDesigner.ControlDesignerAccessibleObject CreateAccessibleObject(Action<Mock<AccessibleObject>>? configureMock = null)
+    {
+        Mock<AccessibleObject> mockAccessibleObject = new();
+
+        configureMock?.Invoke(mockAccessibleObject);
+
+        TestControl control = new(mockAccessibleObject.Object);
+        return new ControlDesigner.ControlDesignerAccessibleObject(_designer, control);
+    }
+
+    [Fact]
+    public void ControlDesignerAccessibleObject_Bounds_ReturnsExpectedValue()
+    {
+        Rectangle expectedBounds = new(10, 10, 100, 100);
+        var accessibleObject = CreateAccessibleObject(mock => mock.Setup(a => a.Bounds).Returns(expectedBounds));
+        accessibleObject.Bounds.Should().Be(expectedBounds);
+    }
+
+    [Fact]
+    public void ControlDesignerAccessibleObject_Description_ReturnsExpectedValue()
+    {
+        string expectedDescription = "Test Description";
+        var accessibleObject = CreateAccessibleObject(mock => mock.Setup(a => a.Description).Returns(expectedDescription));
+
+        accessibleObject.Description.Should().Be(expectedDescription);
+    }
+
+    [Fact]
+    public void ControlDesignerAccessibleObject_Value_ReturnsExpectedValue()
+    {
+        string expectedValue = "Test Value";
+        var accessibleObject = CreateAccessibleObject(mock => mock.Setup(a => a.Value).Returns(expectedValue));
+        accessibleObject.Value.Should().Be(expectedValue);
+    }
+
+    [Fact]
+    public void ControlDesignerAccessibleObject_Role_ReturnsExpectedValue()
+    {
+        var accessibleObject = CreateAccessibleObject(mock => mock.Setup(a => a.Role).Returns(AccessibleRole.PushButton));
+        accessibleObject.Role.Should().Be(AccessibleRole.PushButton);
+    }
+
+    [Fact]
+    public void ControlDesignerAccessibleObject_Parent_ReturnsExpectedValue()
+    {
+        Mock<AccessibleObject> mockParent = new();
+        var accessibleObject = CreateAccessibleObject(mock => mock.Setup(a => a.Parent).Returns(mockParent.Object));
+
+        accessibleObject.Parent.Should().Be(mockParent.Object);
+    }
+
+    [Fact]
+    public void ControlDesignerAccessibleObject_DefaultAction_ReturnsEmptyString()
+    {
+        CreateAccessibleObject().DefaultAction.Should().BeEmpty();
+    }
+
+    [Fact]
+    public void ControlDesignerAccessibleObject_Name_ReturnsExpectedValue()
+    {
+        Control control = new() { Name = "TestControl" };
+        var accessibleObject = new ControlDesigner.ControlDesignerAccessibleObject(_designer, control);
+
+        accessibleObject.Name.Should().Be("TestControl");
+    }
+
+    [Theory]
+    [InlineData(AccessibleStates.Selected, true, true)]
+    [InlineData(AccessibleStates.Focused, true, true)]
+    public void ControlDesignerAccessibleObject_State_ReturnsExpectedValue(AccessibleStates state, bool isSelected, bool isPrimarySelection)
+    {
+        Control control = new();
+        var accessibleObject = new ControlDesigner.ControlDesignerAccessibleObject(_designer, control);
+
+        dynamic accessor = accessibleObject.TestAccessor().Dynamic;
+        accessor._selectionService = Mock.Of<ISelectionService>(s =>
+            s.GetComponentSelected(control) == isSelected &&
+            s.PrimarySelection == (isPrimarySelection ? control : null));
+
+        accessibleObject.State.Should().HaveFlag(state);
+    }
+
+    [Fact]
+    public void ControlDesignerAccessibleObject_GetChild_ReturnsExpectedValue()
+    {
+        Mock<AccessibleObject> mockChild = new();
+        var accessibleObject = CreateAccessibleObject(mock => mock.Setup(a => a.GetChild(It.IsAny<int>())).Returns(mockChild.Object));
+
+        accessibleObject.GetChild(0).Should().Be(mockChild.Object);
+    }
+
+    [Fact]
+    public void ControlDesignerAccessibleObject_GetChildCount_ReturnsExpectedValue()
+    {
+        int expectedChildCount = 3;
+        var accessibleObject = CreateAccessibleObject(mock => mock.Setup(a => a.GetChildCount()).Returns(expectedChildCount));
+        accessibleObject.GetChildCount().Should().Be(expectedChildCount);
+    }
+
+    [Fact]
+    public void ControlDesignerAccessibleObject_GetFocused_ReturnsExpectedValue()
+    {
+        var accessibleObject = CreateAccessibleObject(mock => mock.Setup(a => a.State).Returns(AccessibleStates.Focused));
+        accessibleObject.GetFocused().Should().Be(accessibleObject);
+    }
+
+    [Fact]
+    public void ControlDesignerAccessibleObject_GetSelected_ReturnsExpectedValue()
+    {
+        var accessibleObject = CreateAccessibleObject(mock => mock.Setup(a => a.State).Returns(AccessibleStates.Selected));
+        accessibleObject.GetSelected().Should().Be(accessibleObject);
+    }
+
+    [Fact]
+    public void ControlDesignerAccessibleObject_HitTest_ReturnsExpectedValue()
+    {
+        Mock<AccessibleObject> mockAccessibleObject = new();
+        var accessibleObject = CreateAccessibleObject(mock => mock.Setup(a => a.HitTest(It.IsAny<int>(), It.IsAny<int>())).Returns(mockAccessibleObject.Object));
+
+        accessibleObject.HitTest(10, 10).Should().Be(mockAccessibleObject.Object);
+    }
+}