/V4/StockTrader RI/Desktop/StockTraderRI.Infrastructure.Tests/Behaviors/ReturnCommandBehaviorFixture.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 System;

using System.Windows.Controls;

using System.Windows.Input;

using Microsoft.VisualStudio.TestTools.UnitTesting;

using StockTraderRI.Infrastructure.Behaviors;



namespace StockTraderRI.Infrastructure.Tests.Behaviors

{

    [TestClass]

    public class ReturnCommandBehaviorFixture

    {

        [TestMethod]

        public void ShouldExecuteCommandOnEnter()

        {

            var textBox = new TextBox();

            textBox.Text = "MyParameter";

            textBox.AcceptsReturn = true;

            var command = new MockCommand();

            Assert.IsTrue(textBox.AcceptsReturn);



            TestableReturnCommandBehavior behavior = new TestableReturnCommandBehavior(textBox);

            Assert.IsFalse(textBox.AcceptsReturn);

            behavior.Command = command;



            behavior.InvokeKeyPressed(Key.Enter);



            Assert.IsTrue(command.ExecuteCalled);

            Assert.AreEqual("MyParameter", command.ExecuteParameter);

        }



        [TestMethod]

        public void ShouldNotExecuteCommandOnKeyDifferentThanEnter()

        {

            var textBox = new TextBox();

            textBox.Text = "MyParameter";

            TestableReturnCommandBehavior behavior = new TestableReturnCommandBehavior(textBox);

            var command = new MockCommand();

            behavior.Command = command;



            behavior.InvokeKeyPressed(Key.Space);



            Assert.IsFalse(command.ExecuteCalled);

        }



        [TestMethod]

        public void ShouldSetEmptyTextAfterCommandExecution()

        {

            var textBox = new TextBox();

            var command = new MockCommand();



            TestableReturnCommandBehavior behavior = new TestableReturnCommandBehavior(textBox);

            behavior.Command = command;

            behavior.DefaultTextAfterCommandExecution = "MyDefaultText";



            behavior.InvokeKeyPressed(Key.Enter);



            Assert.AreEqual(string.Empty, textBox.Text);

        }

    }



    internal class MockCommand : ICommand

    {

        public bool ExecuteCalled;

        public object ExecuteParameter;

        public event EventHandler CanExecuteChanged;



        public bool CanExecute(object parameter)

        {

            return true;

        }



        public void Execute(object parameter)

        {

            ExecuteCalled = true;

            ExecuteParameter = parameter;

        }

    }



    internal class TestableReturnCommandBehavior : ReturnCommandBehavior

    {

        public TestableReturnCommandBehavior(TextBox textBox)

            : base(textBox)

        {

        }



        public void InvokeKeyPressed(Key keyPressed)

        {

            base.KeyPressed(keyPressed);

        }

    }

}