Implement [BindableProperty] for ValidationBehaviors

src/CommunityToolkit.Maui.Core/Primitives/Defaults/MultiValidationBehaviorDefaults.cs

@@ -0,0 +1,7 @@
+namespace CommunityToolkit.Maui.Core;
+
+static class MultiValidationBehaviorDefaults
+{
+	public static List<object?>? Errors { get; } = null;
+	public static List<object?>? Error { get; } = null;
+}

src/CommunityToolkit.Maui.Core/Primitives/Defaults/NumericValidationBehaviorDefaults.cs

@@ -0,0 +1,9 @@
+namespace CommunityToolkit.Maui.Core;
+
+static class NumericValidationBehaviorDefaults
+{
+	public const double MinimumValue = double.NegativeInfinity;
+	public const double MaximumValue = double.PositiveInfinity;
+	public const int MinimumDecimalPlaces = 0;
+	public const int MaximumDecimalPlaces = int.MaxValue;
+}

src/CommunityToolkit.Maui.Core/Primitives/Defaults/RequiredStringValidationBehaviorDefaults.cs

@@ -0,0 +1,7 @@
+namespace CommunityToolkit.Maui.Core;
+
+static class RequiredStringValidationBehaviorDefaults
+{
+	public const string? RequiredString = null;
+	public const bool ExactMatch = true;
+}

src/CommunityToolkit.Maui.Core/Primitives/Defaults/UriValidationBehaviorDefaults.cs

@@ -0,0 +1,6 @@
+namespace CommunityToolkit.Maui.Core;
+
+static class UriValidationBehaviorDefaults
+{
+	public static UriKind UriKind { get; } = UriKind.RelativeOrAbsolute;
+}

src/CommunityToolkit.Maui.UnitTests/Behaviors/CharactersValidationBehaviorTests.cs

@@ -1,4 +1,5 @@
 using CommunityToolkit.Maui.Behaviors;
+using CommunityToolkit.Maui.Core;
 using Nito.AsyncEx;
 using Xunit;
 
@@ -125,4 +126,14 @@ public void EnsureObjectDisposedExceptionThrownWhenDisposedBehaviorAttachedToVis
 			});
 		});
 	}
+
+	[Fact]
+	public void VerifyDefaults()
+	{
+		var charactersValidationBehavior = new CharactersValidationBehavior();
+
+		Assert.Equal(CharactersValidationBehaviorDefaults.CharacterType, charactersValidationBehavior.CharacterType);
+		Assert.Equal(CharactersValidationBehaviorDefaults.MaximumCharacterTypeCount, charactersValidationBehavior.MaximumCharacterTypeCount);
+		Assert.Equal(CharactersValidationBehaviorDefaults.MinimumCharacterTypeCount, charactersValidationBehavior.MinimumCharacterTypeCount);
+	}
 }

src/CommunityToolkit.Maui.UnitTests/Behaviors/MultiValidationBehaviorTests.cs

@@ -1,4 +1,5 @@
 using CommunityToolkit.Maui.Behaviors;
+using CommunityToolkit.Maui.Core;
 using Xunit;
 
 namespace CommunityToolkit.Maui.UnitTests.Behaviors;
@@ -119,4 +120,15 @@ public async Task ForceValidateCancellationTokenCanceled()
 		// Assert
 		await Assert.ThrowsAsync<OperationCanceledException>(async () => await multiBehavior.ForceValidate(cts.Token));
 	}
+
+	[Fact]
+	public void VerifyDefaults()
+	{
+		// Arrange
+		var multiValidationBehavior = new MultiValidationBehavior();
+
+		// Act // Assert
+		Assert.Equal(MultiValidationBehaviorDefaults.Errors, multiValidationBehavior.Errors);
+		Assert.Equal(MultiValidationBehaviorDefaults.Error, MultiValidationBehavior.GetError(multiValidationBehavior));
+	}
 }

src/CommunityToolkit.Maui.UnitTests/Behaviors/NumericValidationBehaviorTests.cs

@@ -1,5 +1,6 @@
 using System.Globalization;
 using CommunityToolkit.Maui.Behaviors;
+using CommunityToolkit.Maui.Core;
 using FluentAssertions;
 using Xunit;
 
@@ -159,4 +160,17 @@ await Assert.ThrowsAsync<OperationCanceledException>(async () =>
 			await behavior.ForceValidate(cts.Token);
 		});
 	}
+
+	[Fact]
+	public void VerifyDefaults()
+	{
+		// Arrange
+		var numericValidationBehavior = new NumericValidationBehavior();
+
+		// Act Assert
+		Assert.Equal(NumericValidationBehaviorDefaults.MaximumDecimalPlaces, numericValidationBehavior.MaximumDecimalPlaces);
+		Assert.Equal(NumericValidationBehaviorDefaults.MaximumValue, numericValidationBehavior.MaximumValue);
+		Assert.Equal(NumericValidationBehaviorDefaults.MinimumDecimalPlaces, numericValidationBehavior.MinimumDecimalPlaces);
+		Assert.Equal(NumericValidationBehaviorDefaults.MinimumValue, numericValidationBehavior.MinimumValue);
+	}
 }

src/CommunityToolkit.Maui.UnitTests/Behaviors/RequiredStringValidationBehaviorTests.cs

@@ -1,5 +1,6 @@
 using System.Globalization;
 using CommunityToolkit.Maui.Behaviors;
+using CommunityToolkit.Maui.Core;
 using Xunit;
 
 namespace CommunityToolkit.Maui.UnitTests.Behaviors;
@@ -157,4 +158,15 @@ public void IsValidFalseWhenEnterDifferentText_Test()
 		// Assert
 		Assert.False(confirmPasswordBehavior.IsValid);
 	}
+
+	[Fact]
+	public void VerifyDefaults()
+	{
+		// Arrange
+		var requiredStringValidationBehavior = new RequiredStringValidationBehavior();
+
+		// Act Assert
+		Assert.Equal(RequiredStringValidationBehaviorDefaults.ExactMatch, requiredStringValidationBehavior.ExactMatch);
+		Assert.Equal(RequiredStringValidationBehaviorDefaults.RequiredString, requiredStringValidationBehavior.RequiredString);
+	}
 }

src/CommunityToolkit.Maui.UnitTests/Behaviors/TextValidationBehaviorTests.cs

@@ -84,4 +84,18 @@ await Assert.ThrowsAsync<OperationCanceledException>(async () =>
 			await behavior.ForceValidate(cts.Token);
 		});
 	}
+
+	[Fact]
+	public void VerifyDefaults()
+	{
+		// Arrange
+		var textValidationBehavior = new TextValidationBehavior();
+
+		// Act Assert
+		Assert.Equal(TextValidationBehaviorDefaults.DecorationFlags, textValidationBehavior.DecorationFlags);
+		Assert.Equal(TextValidationBehaviorDefaults.MaximumLength, textValidationBehavior.MaximumLength);
+		Assert.Equal(TextValidationBehaviorDefaults.MinimumLength, textValidationBehavior.MinimumLength);
+		Assert.Equal(TextValidationBehaviorDefaults.RegexOptions, textValidationBehavior.RegexOptions);
+		Assert.Equal(TextValidationBehaviorDefaults.RegexPattern, textValidationBehavior.RegexPattern);
+	}
 }

src/CommunityToolkit.Maui.UnitTests/Behaviors/UriValidationBehaviorTests.cs

@@ -1,4 +1,5 @@
 using CommunityToolkit.Maui.Behaviors;
+using CommunityToolkit.Maui.Core;
 using Xunit;
 
 namespace CommunityToolkit.Maui.UnitTests.Behaviors;
@@ -75,4 +76,14 @@ await Assert.ThrowsAsync<OperationCanceledException>(async () =>
 			await behavior.ForceValidate(cts.Token);
 		});
 	}
+
+	[Fact]
+	public void VerifyDefaults()
+	{
+		// Arrange
+		var behavior = new UriValidationBehavior();
+
+		// Act Assert
+		Assert.Equal(UriValidationBehaviorDefaults.UriKind, behavior.UriKind);
+	}
 }

src/CommunityToolkit.Maui.UnitTests/Behaviors/ValidationBehaviorTests.cs

@@ -245,6 +245,24 @@ public void TestRemoveValidationBindingWithoutBindingContext()
 
 		Assert.Empty(view.Behaviors);
 	}
+
+	[Fact]
+	public void VerifyDefaults()
+	{
+		// Arrange
+		var behavior = new MockValidationBehavior();
+
+		// Act Assert
+		Assert.Equal(ValidationBehaviorDefaults.IsNotValid, behavior.IsNotValid);
+		Assert.Equal(ValidationBehaviorDefaults.IsValid, behavior.IsValid);
+		Assert.Equal(ValidationBehaviorDefaults.IsRunning, behavior.IsRunning);
+		Assert.Equal(ValidationBehaviorDefaults.ValidStyle, behavior.ValidStyle);
+		Assert.Equal(ValidationBehaviorDefaults.InvalidStyle, behavior.InvalidStyle);
+		Assert.Equal(ValidationBehaviorDefaults.Value, behavior.Value);
+		Assert.Equal(ValidationBehaviorDefaults.ValuePropertyName, behavior.ValuePropertyName);
+		Assert.Equal(ValidationBehaviorDefaults.Flags, behavior.Flags);
+
+	}
 }
 
 public class StyleSetterComparer(ITestOutputHelper testOutputHelper) : IEqualityComparer<Setter>

src/CommunityToolkit.Maui/Behaviors/Validators/CharactersValidationBehavior.shared.cs

@@ -1,4 +1,5 @@
-using System.Diagnostics.CodeAnalysis;
+using System.ComponentModel;
+using System.Diagnostics.CodeAnalysis;
 namespace CommunityToolkit.Maui.Behaviors;
 
 /// <summary>The allowed character types used to determine if a value is valid in the <see cref="CharactersValidationBehavior"/>. Since this is a flag, multiple flags cane be combined.</summary>
@@ -47,25 +48,7 @@ public enum CharacterType
 [RequiresUnreferencedCode($"{nameof(CharactersValidationBehavior)} is not trim safe because it uses bindings with string paths.")]
 public partial class CharactersValidationBehavior : TextValidationBehavior
 {
-	List<Predicate<char>> characterPredicates = Enumerable.Empty<Predicate<char>>().ToList();
-
-	/// <summary>
-	/// Backing BindableProperty for the <see cref="CharacterType"/> property.
-	/// </summary>
-	public static readonly BindableProperty CharacterTypeProperty =
-		BindableProperty.Create(nameof(CharacterType), typeof(CharacterType), typeof(CharactersValidationBehavior), CharacterType.Any, propertyChanged: OnCharacterTypePropertyChanged);
-
-	/// <summary>
-	/// Backing BindableProperty for the <see cref="MinimumCharacterTypeCount"/> property.
-	/// </summary>
-	public static readonly BindableProperty MinimumCharacterTypeCountProperty =
-		BindableProperty.Create(nameof(MinimumCharacterTypeCount), typeof(int), typeof(CharactersValidationBehavior), 0, propertyChanged: OnValidationPropertyChanged);
-
-	/// <summary>
-	/// Backing BindableProperty for the <see cref="MaximumCharacterTypeCount"/> property.
-	/// </summary>
-	public static readonly BindableProperty MaximumCharacterTypeCountProperty =
-		BindableProperty.Create(nameof(MaximumCharacterTypeCount), typeof(int), typeof(CharactersValidationBehavior), int.MaxValue, propertyChanged: OnValidationPropertyChanged);
+	List<Predicate<char>> characterPredicates = [];
 
 	/// <summary>
 	/// Constructor for this behavior
@@ -75,29 +58,20 @@ public partial class CharactersValidationBehavior : TextValidationBehavior
 	/// <summary>
 	/// Provides an enumerated value to use to set how to handle comparisons. This is a bindable property.
 	/// </summary>
-	public CharacterType CharacterType
-	{
-		get => (CharacterType)GetValue(CharacterTypeProperty);
-		set => SetValue(CharacterTypeProperty, value);
-	}
+	[BindableProperty(PropertyChangedMethodName = nameof(OnCharacterTypePropertyChanged))]
+	public partial CharacterType CharacterType { get; set; } = CharactersValidationBehaviorDefaults.CharacterType;
 
 	/// <summary>
 	/// The minimum number of <see cref="CharacterType"/> required. This is a bindable property.
 	/// </summary>
-	public int MinimumCharacterTypeCount
-	{
-		get => (int)GetValue(MinimumCharacterTypeCountProperty);
-		set => SetValue(MinimumCharacterTypeCountProperty, value);
-	}
+	[BindableProperty(PropertyChangedMethodName = nameof(OnValidationPropertyChanged))]
+	public partial int MinimumCharacterTypeCount { get; set; } = CharactersValidationBehaviorDefaults.MinimumCharacterTypeCount;
 
 	/// <summary>
 	/// The maximum number of <see cref="CharacterType"/> allowed. This is a bindable property.
 	/// </summary>
-	public int MaximumCharacterTypeCount
-	{
-		get => (int)GetValue(MaximumCharacterTypeCountProperty);
-		set => SetValue(MaximumCharacterTypeCountProperty, value);
-	}
+	[BindableProperty(PropertyChangedMethodName = nameof(OnValidationPropertyChanged))]
+	public partial int MaximumCharacterTypeCount { get; set; } = CharactersValidationBehaviorDefaults.MaximumCharacterTypeCount;
 
 	/// <inheritdoc/>
 	protected override async ValueTask<bool> ValidateAsync(string? value, CancellationToken token)

src/CommunityToolkit.Maui/Behaviors/Validators/MultiValidationBehavior.shared.cs

@@ -1,5 +1,6 @@
 using System.Collections.ObjectModel;
 using System.Diagnostics.CodeAnalysis;
+using CommunityToolkit.Maui.Core;
 
 namespace CommunityToolkit.Maui.Behaviors;
 
@@ -11,18 +12,12 @@ namespace CommunityToolkit.Maui.Behaviors;
 [ContentProperty(nameof(Children))]
 public partial class MultiValidationBehavior : ValidationBehavior
 {
-	/// <summary>
-	/// Backing BindableProperty for the <see cref="Errors"/> property.
-	/// </summary>
-	public static readonly BindableProperty ErrorsProperty =
-		BindableProperty.Create(nameof(Errors), typeof(List<object?>), typeof(MultiValidationBehavior), null, BindingMode.OneWayToSource);
-
 	/// <summary>
 	/// BindableProperty for getting the error.
 	/// </summary>
 	public static readonly BindableProperty ErrorProperty =
 		BindableProperty.CreateAttached(nameof(GetError), typeof(object), typeof(MultiValidationBehavior), null);
-
+	
 	readonly ObservableCollection<ValidationBehavior> children = [];
 
 	/// <summary>
@@ -33,11 +28,8 @@ public partial class MultiValidationBehavior : ValidationBehavior
 	/// <summary>
 	/// Holds the errors from all the nested invalid validators in <see cref="Children"/>. This is a bindable property.
 	/// </summary>
-	public List<object?>? Errors
-	{
-		get => (List<object?>?)GetValue(ErrorsProperty);
-		set => SetValue(ErrorsProperty, value);
-	}
+	[BindableProperty(DefaultBindingMode = BindingMode.OneWayToSource)]
+	public partial List<object?>? Errors { get; set; } = MultiValidationBehaviorDefaults.Errors;
 
 	/// <summary>
 	/// Method to extract the error from the attached property for a child behavior in <see cref="Children"/>.
@@ -61,7 +53,7 @@ await Task.WhenAll(children.Select(async validationBehavior =>
 			validationBehavior.Value = value;
 			await validationBehavior.ValidateNestedAsync(token);
 		})).ConfigureAwait(false);
-
+		
 		var errors = children.Where(static c => c.IsNotValid).Select(GetError).ToList();
 
 		if (errors.Count is 0)