/V2.2/trunk/CAL/Desktop/Composite.Presentation.Tests/Commands/ClickFixture.cs

//===================================================================================

// Microsoft patterns & practices

// Composite Application Guidance for Windows Presentation Foundation and Silverlight

//===================================================================================

// Copyright (c) Microsoft Corporation.  All rights reserved.

// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY

// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT

// LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND

// FITNESS FOR A PARTICULAR PURPOSE.

//===================================================================================

// The example companies, organizations, products, domain names,

// e-mail addresses, logos, people, places, and events depicted

// herein are fictitious.  No association with any real company,

// organization, product, domain name, email address, logo, person,

// places, or events is intended or should be inferred.

//===================================================================================

using Microsoft.Practices.Composite.Presentation.Commands;

using Microsoft.Practices.Composite.Presentation.Tests.Mocks;

using Microsoft.VisualStudio.TestTools.UnitTesting;



namespace Microsoft.Practices.Composite.Presentation.Tests.Commands

{

    [TestClass]

    public class ClickFixture

    {

        [TestMethod]

        public void ShouldHookUpClickCommandBehaviorWhenSettingProperty()

        {

            var clickableObject = new MockClickableObject();

            var command = new MockCommand();



            Click.SetCommand(clickableObject, command);

            Assert.IsFalse(command.ExecuteCalled);



            clickableObject.RaiseClick();



            Assert.IsTrue(command.ExecuteCalled);

            Assert.AreSame(command, Click.GetCommand(clickableObject));

        }



        [TestMethod]

        public void ShouldUpdateCommandOnBehaviorWhenChangingProperty()

        {

            var clickableObject = new MockClickableObject();

            var oldCommand = new MockCommand();

            var newCommand = new MockCommand();



            Click.SetCommand(clickableObject, oldCommand);

            Click.SetCommand(clickableObject, newCommand);



            clickableObject.RaiseClick();



            Assert.IsTrue(newCommand.ExecuteCalled);

            Assert.IsFalse(oldCommand.ExecuteCalled);

        }



        [TestMethod]

        public void ShouldExecuteWithCommandParameter()

        {

            var clickableObject = new MockClickableObject();

            var command = new MockCommand();

            var parameter = new object();



            Click.SetCommand(clickableObject, command);

            Click.SetCommandParameter(clickableObject, parameter);

            Assert.IsNull(command.ExecuteParameter);



            clickableObject.RaiseClick();



            Assert.IsTrue(command.ExecuteCalled);

            Assert.IsNotNull(command.ExecuteParameter);

            Assert.AreSame(parameter, command.ExecuteParameter);

        }



        [TestMethod]

        public void ShouldCallCanExecuteOnParameterChange()

        {

            var clickableObject = new MockClickableObject();



            var command = new MockCommand();

            var parameter = new object();

            Click.SetCommand(clickableObject, command);

            Assert.IsNull(command.CanExecuteParameter);

            Assert.IsTrue(clickableObject.IsEnabled);



            command.CanExecuteReturnValue = false;

            Click.SetCommandParameter(clickableObject, parameter);



            Assert.IsNotNull(command.CanExecuteParameter);

            Assert.AreSame(parameter, command.CanExecuteParameter);

            Assert.IsFalse(clickableObject.IsEnabled);

        }

    }

}