Revert "Revert AsyncValueCommandSupport"

This reverts commit 07a178c.

Author: maxkoshevoi

src/CommunityToolkit/Xamarin.CommunityToolkit.UnitTests/ObjectModel/ICommandTests/CommandFactoryTests/CommandFactory_AsyncValueCommand_Tests.cs

@@ -0,0 +1,115 @@
+using System;
+using System.Threading.Tasks;
+using Xamarin.CommunityToolkit.Exceptions;
+using Xamarin.CommunityToolkit.ObjectModel;
+using Xamarin.CommunityToolkit.UnitTests.ObjectModel.ICommandTests.AsyncValueCommandTests;
+using Xunit;
+
+namespace Xamarin.CommunityToolkit.UnitTests.ObjectModel.ICommandTests.CommandFactoryTests
+{
+	public class CommandFactoryAsyncValueCommandTests : BaseAsyncValueCommandTests
+	{
+
+		[Fact]
+		public void NullExecuteParameter()
+		{
+			// Arrange
+			Func<ValueTask> execute = null;
+
+			// Act
+
+			// Assert
+			Assert.Throws<ArgumentNullException>(() => CommandFactory.Create(execute));
+		}
+
+		[Fact]
+		public void NullCanExecuteParameter()
+		{
+			// Arrange
+			var command = CommandFactory.Create(NoParameterTask, null);
+
+			// Act
+
+			// Assert
+			Assert.True(command.CanExecute(null));
+			Assert.True(command.CanExecute(string.Empty));
+			Assert.True(command.CanExecute(0));
+		}
+
+		[Fact]
+		public void IntExecuteNullCanExecuteParameter()
+		{
+			// Arrange
+			var command = CommandFactory.Create<int>(IntParameterTask, null);
+
+			// Act
+
+			// Assert
+			Assert.True(command.CanExecute(null));
+			Assert.True(command.CanExecute(string.Empty));
+			Assert.True(command.CanExecute(0));
+
+			command.Execute(0);
+			Assert.Throws<InvalidCommandParameterException>(() => command.Execute(null));
+			Assert.Throws<InvalidCommandParameterException>(() => command.Execute(string.Empty));
+		}
+
+		[Fact]
+		public void IntExecuteTrueCanExecuteParameter()
+		{
+			// Arrange
+			var command = CommandFactory.Create<int>(IntParameterTask, CanExecuteTrue);
+
+			// Act
+
+			// Assert
+			Assert.True(command.CanExecute(null));
+			Assert.True(command.CanExecute(string.Empty));
+			Assert.True(command.CanExecute(0));
+		}
+
+		[Fact]
+		public void IntExecuteFalseCanExecuteParameter()
+		{
+			// Arrange
+			var command = CommandFactory.Create<int>(IntParameterTask, CanExecuteFalse);
+
+			// Act
+
+			// Assert
+			Assert.False(command.CanExecute(null));
+			Assert.False(command.CanExecute(string.Empty));
+			Assert.False(command.CanExecute(0));
+		}
+
+		[Fact]
+		public void IntExecuteNullTypedCanExecuteParameter()
+		{
+			// Arrange
+			var command = CommandFactory.Create<int, bool>(IntParameterTask, null);
+
+			// Act
+
+			// Assert
+			Assert.True(command.CanExecute(true));
+			Assert.Throws<InvalidCommandParameterException>(() => command.CanExecute(null));
+			Assert.Throws<InvalidCommandParameterException>(() => command.CanExecute(string.Empty));
+			Assert.Throws<InvalidCommandParameterException>(() => command.CanExecute(0));
+		}
+
+		[Fact]
+		public void IntExecuteBoolCanExecuteParameter()
+		{
+			// Arrange
+			var command = CommandFactory.Create<int, bool>(IntParameterTask, CanExecuteTrue);
+
+			// Act
+
+			// Assert
+			Assert.True(command.CanExecute(true));
+			Assert.Throws<InvalidCommandParameterException>(() => command.CanExecute(null));
+			Assert.Throws<InvalidCommandParameterException>(() => command.CanExecute(string.Empty));
+			Assert.Throws<InvalidCommandParameterException>(() => command.CanExecute(0));
+		}
+	}
+}

src/CommunityToolkit/Xamarin.CommunityToolkit/ObjectModel/CommandFactory.shared.cs

@@ -41,6 +41,30 @@ public static IAsyncCommand<TExecute, TCanExecute> Create<TExecute, TCanExecute>
 			bool allowsMultipleExecutions = true) =>
 			new AsyncCommand<TExecute, TCanExecute>(execute, canExecute, onException, continueOnCapturedContext, allowsMultipleExecutions);
 
+		public static IAsyncValueCommand Create(
+			Func<ValueTask> execute,
+			Func<bool> canExecute = null,
+			Action<Exception> onException = null,
+			bool continueOnCapturedContext = false,
+			bool allowsMultipleExecutions = true) =>
+			new AsyncValueCommand(execute, canExecute, onException, continueOnCapturedContext, allowsMultipleExecutions);
+
+		public static IAsyncValueCommand<TExecute> Create<TExecute>(
+			Func<TExecute, ValueTask> execute,
+			Func<bool> canExecute = null,
+			Action<Exception> onException = null,
+			bool continueOnCapturedContext = false,
+			bool allowsMultipleExecutions = true) =>
+			new AsyncValueCommand<TExecute>(execute, canExecute, onException, continueOnCapturedContext, allowsMultipleExecutions);
+
+		public static IAsyncValueCommand<TExecute, TCanExecute> Create<TExecute, TCanExecute>(
+			Func<TExecute, ValueTask> execute,
+			Func<TCanExecute, bool> canExecute = null,
+			Action<Exception> onException = null,
+			bool continueOnCapturedContext = false,
+			bool allowsMultipleExecutions = true) =>
+			new AsyncValueCommand<TExecute, TCanExecute>(execute, canExecute, onException, continueOnCapturedContext, allowsMultipleExecutions);
+
 		static Action<object> ConvertExecute<T>(Action<T> execute)
 		{
 			if (execute == null)