/V4/Quickstarts/MVVM/MVVM.Test/Model/MultipleSelectionQuestionFixture.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.ComponentModel;

using System.Linq;

using MVVM.Model;

using Microsoft.VisualStudio.TestTools.UnitTesting;



namespace MVVM.Test.Model

{

    [TestClass]

    public class MultipleSelectionQuestionFixture

    {

        [TestMethod]

        public void WhenQuestionIsNew_ThenItIsNotComplete()

        {

            var question =

                new MultipleSelectionQuestion()

                {

                    Range = new[] { "one", "two", "three" },

                    MaxSelections = 2

                };



            Assert.IsFalse(question.IsComplete);

        }



        [TestMethod]

        public void WhenQuestionHasInvalidValue_ThenItIsNotComplete()

        {

            var question =

                new MultipleSelectionQuestion()

                {

                    Range = new[] { "one", "two", "three" },

                    MaxSelections = 2

                };

            question.Response = new[] { "one", "two", "three" };



            Assert.IsFalse(question.IsComplete);

        }



        [TestMethod]

        public void WhenQuestionHasNullValue_ThenItIsNotComplete()

        {

            var question =

                new MultipleSelectionQuestion()

                {

                    Range = new[] { "one", "two", "three" },

                    MaxSelections = 2

                };



            question.Response = new[] { "one" };

            question.Response = null;



            Assert.IsFalse(question.IsComplete);

        }



        [TestMethod]

        public void WhenQuestionHasValidValue_ThenItIsComplete()

        {

            var question =

                new MultipleSelectionQuestion()

                {

                    Range = new[] { "one", "two", "three" },

                    MaxSelections = 2

                };



            question.Response = new[] { "one" };



            Assert.IsTrue(question.IsComplete);

        }



        [TestMethod]

        public void WhenResponseHasLessElementsThanMax_ThenIndicatesNoErrorOnResponse()

        {

            var question =

                new MultipleSelectionQuestion()

                {

                    Range = new[] { "one", "two", "three" },

                    MaxSelections = 2

                };



            var notifyErrorInfo = (INotifyDataErrorInfo)question;



            question.Response = new[] { "one" };



            Assert.IsFalse(notifyErrorInfo.GetErrors("Response").Cast<string>().Any());

        }



        [TestMethod]

        public void WhenResponseHasMoreElementsThanMax_ThenIndicatesErrorOnResponse()

        {

            var question =

                new MultipleSelectionQuestion()

                {

                    Range = new[] { "one", "two", "three" },

                    MaxSelections = 2

                };



            var notifyErrorInfo = (INotifyDataErrorInfo)question;



            question.Response = new[] { "one", "two", "three" };



            Assert.IsTrue(notifyErrorInfo.GetErrors("Response").Cast<string>().Any());

        }



        [TestMethod]

        public void WhenSettingResponseToNull_ThenIndicatesErrorOnResponse()

        {

            var question =

                new MultipleSelectionQuestion()

                {

                    Range = new[] { "one", "two", "three" },

                    MaxSelections = 2

                };



            var notifyErrorInfo = (INotifyDataErrorInfo)question;



            question.Response = new[] { "one" };

            Assert.IsFalse(notifyErrorInfo.GetErrors("Response").Cast<string>().Any());



            question.Response = null;

            Assert.IsTrue(notifyErrorInfo.GetErrors("Response").Cast<string>().Any());

        }

    }

}