Fix Stepper control fails to reach maximum value when increment exceeds remaining threshold (#29763)

* Fix for 29740

* Update Issue29740.cs

* Update src/Controls/tests/TestCases.HostApp/Issues/Issue29740.cs

indentation changes

Co-authored-by: MartyIX <203266+MartyIX@users.noreply.github.com>

* Update src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue29740.cs

Co-authored-by: MartyIX <203266+MartyIX@users.noreply.github.com>

---------

Co-authored-by: MartyIX <203266+MartyIX@users.noreply.github.com>

Author: 2 people

src/Controls/tests/TestCases.HostApp/Issues/Issue29740.cs

@@ -0,0 +1,64 @@
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 29740, "[Windows] Stepper control fails to reach maximum value when increment exceeds remaining threshold",
+	PlatformAffected.UWP)]
+public class Issue29740 : ContentPage
+{
+	Label stepperValueLabel;
+	Stepper myStepper;
+
+	public Issue29740()
+	{
+		// Initialize the label
+		stepperValueLabel = new Label
+		{
+			AutomationId = "29740StepperValueLabel",
+			Text = "Stepper Value: 0",
+			FontSize = 18,
+			HorizontalOptions = LayoutOptions.Center
+		};
+
+		// Initialize the stepper
+		myStepper = new Stepper
+		{
+			AutomationId = "29740Stepper",
+			Minimum = 0,
+			Maximum = 10,
+			Increment = 3,
+			HorizontalOptions = LayoutOptions.Center
+		};
+		myStepper.ValueChanged += OnStepperValueChanged;
+
+		// Create the layout
+		var verticalStack = new VerticalStackLayout
+		{
+			Padding = new Thickness(30, 0),
+			Spacing = 25,
+			Children =
+				{
+					stepperValueLabel,
+					myStepper
+				}
+		};
+
+		// Embed in a ScrollView
+		Content = new ScrollView
+		{
+			Content = verticalStack
+		};
+
+		// Optionally update initial value display
+		UpdateLabel(myStepper.Value);
+	}
+
+	private void OnStepperValueChanged(object sender, ValueChangedEventArgs e)
+	{
+		UpdateLabel(e.NewValue);
+	}
+
+	private void UpdateLabel(double value)
+	{
+		stepperValueLabel.Text = $"Stepper Value: {value}";
+	}
+}
+

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue29740.cs

@@ -0,0 +1,28 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+
+public class Issue29740 : _IssuesUITest
+{
+	public Issue29740(TestDevice device) : base(device)
+	{
+	}
+
+	public override string Issue => "[Windows] Stepper control fails to reach maximum value when increment exceeds remaining threshold";
+
+	[Test]
+	[Category(UITestCategories.Stepper)]
+	public void GestureRecognizersOnLabelSpanShouldWork()
+	{
+		var initialvalue = App.WaitForElement("29740StepperValueLabel").GetText();
+		Assert.That(initialvalue, Is.EqualTo("Stepper Value: 0"));
+		for (int i = 0; i < 4; i++)
+		{
+			App.IncreaseStepper("29740Stepper");
+		}
+		var finalvalue = App.WaitForElement("29740StepperValueLabel").GetText();
+		Assert.That(finalvalue, Is.EqualTo("Stepper Value: 10"));
+	}
+}

src/Core/src/Platform/Windows/MauiStepper.cs

@@ -258,9 +258,6 @@ void UpdateEnabled(double value)
 		void UpdateValue(double delta)
 		{
 			double newValue = Value + delta;
-			if (newValue > Maximum || newValue < Minimum)
-				return;
-
 			Value = newValue;
 		}