#region Copyright (c) 2009 S. van Deursen
/* The CuttingEdge.Conditions library enables developers to validate pre- and postconditions in a fluent
* manner.
*
* To contact me, please visit my blog at http://www.cuttingedge.it/blogs/steven/
*
* Copyright (c) 2009 S. van Deursen
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
* associated documentation files (the "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the
* following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
* LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
* EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#endregion
using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace CuttingEdge.Conditions.UnitTests.UseCases
{
internal static class UseCaseTestHelper
{
public static void Test(Action useCase, Action conditions)
{
Condition.Requires(useCase, "useCase").IsNotNull();
Condition.Requires(conditions, "conditions").IsNotNull();
Exception useCaseException = ReturnExceptionOrNull(useCase);
Exception conditionsException = ReturnExceptionOrNull(conditions);
AssertWhenTypesDiffer(useCaseException, conditionsException);
}
private static void AssertWhenTypesDiffer(Exception useCaseException, Exception conditionsException)
{
if (useCaseException == null && conditionsException == null)
{
return;
}
if (useCaseException != null && conditionsException != null)
{
if (useCaseException.GetType() == conditionsException.GetType())
{
return;
}
Assert.Fail(string.Format("Both cases throw a different type of exception. " +
"The use case threw a {0} and conditions threw a {1}.", useCaseException.GetType().Name,
conditionsException.GetType().Name));
}
if (useCaseException == null)
{
Assert.Fail("The use case action didn't throw an exception, while the conditions action did.");
}
else
{
Assert.Fail("The use case action threw an exception, while the conditions action didn't.");
}
}
private static Exception ReturnExceptionOrNull(Action action)
{
try
{
action();
}
catch (Exception ex)
{
return ex;
}
return null;
}
}
}