/V2/trunk/RI/Desktop/StockTraderRI.Infrastructure.Tests/Converters/ErrorConverterFixture.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.Collections.Generic;

using System.Reflection;

using System.Windows.Controls;

using Microsoft.VisualStudio.TestTools.UnitTesting;

using StockTraderRI.Infrastructure.Converters;



namespace StockTraderRI.Infrastructure.Tests.Converters

{

    [TestClass]

    public class ErrorConverterFixture

    {

        [TestMethod]

        public void ShouldReturnEmptyStringIfValueIsNull()

        {

            ErrorConverter converter = new ErrorConverter();

            object errors = null;



            object result = converter.Convert(errors, null, null, null);



            Assert.AreEqual(string.Empty, result);

        }



        [TestMethod]

        public void ShouldReturnEmptyStringIfCollectionIsEmpty()

        {

            ErrorConverter converter = new ErrorConverter();



            List<ValidationError> errors = new List<ValidationError>();



            object result = converter.Convert(errors.AsReadOnly(), null, null, null);



            Assert.AreEqual(string.Empty, result);

        }



        [TestMethod]

        public void ShouldReturnTheExceptionMessageOfTheFirstItemInTheCollection()

        {

            ErrorConverter converter = new ErrorConverter();



            List<ValidationError> errors = new List<ValidationError>();

            ValidationError error = new ValidationError(new ExceptionValidationRule(), new object());

            error.Exception = new Exception("TestError");

            errors.Add(error);



            object result = converter.Convert(errors.AsReadOnly(), null, null, null);



            Assert.AreEqual("TestError", result);

        }



        [TestMethod]

        public void ShouldReturnTheInnerExceptionMessageOfATargetInvocationException()

        {

            ErrorConverter converter = new ErrorConverter();



            List<ValidationError> errors = new List<ValidationError>();

            ValidationError error = new ValidationError(new ExceptionValidationRule(), new object());

            error.Exception = new TargetInvocationException(null, new Exception("TestError"));

            errors.Add(error);



            object result = converter.Convert(errors.AsReadOnly(), null, null, null);



            Assert.AreEqual("TestError", result);

        }



        [TestMethod]

        public void ShouldReturnTheErrorContentOfTheFirstItemInTheCollection()

        {

            ErrorConverter converter = new ErrorConverter();



            List<ValidationError> errors = new List<ValidationError>();

            ValidationError error = new ValidationError(new ExceptionValidationRule(), new object());

            error.ErrorContent = "TestError";

            errors.Add(error);



            object result = converter.Convert(errors.AsReadOnly(), null, null, null);



            Assert.AreEqual("TestError", result);

        }

    }

}