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POStrategy pattern with Factory class Unit testing
 

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  1. POStrategy pattern with Factory class Unit testing
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    <p>I was looking for some sample code for unit testing the strategy pattern method invocation. </p> <p>I have a strategy pattern class LeaveCalculator and based on the leave type the factory class will instantiate the specific calculator.<br> For the Unit Test part I am trying to verify the proper Leave type calculation is invoked when we call the LeaveCalculator calculate method.</p> <p>I am using C# for mocking RhinoMocks. </p> <p>Please let me know any code samples to do this?</p> <pre><code>public static class LeaveCategoryFactory { private static List&lt;ILeaveCalculation&gt; categories = new List&lt;ILeaveCalculation&gt;(); public static ILeaveCalculation GetCategory(LeaveCalculationType calculationType) { if (categories.Count == 0) { categories = Assembly.GetExecutingAssembly() .GetTypes() .Where(type =&gt; typeof(ILeaveCalculation).IsAssignableFrom(type) &amp;&amp; type.IsClass) .Select(type =&gt; Activator.CreateInstance(type)) .Cast&lt;ILeaveCalculation&gt;() .ToList(); } return categories.Where(x =&gt; x.CalculationType == calculationType).FirstOrDefault() as ILeaveCalculation; } } [TestMethod] public void ShouldReturnOneWhenAvailableLeaveCountIs12AndWorkedForAMonth() { leaveCount.StartDate = systemDateTime.Now.Date.AddMonths(-1); leaveCount.EndDate = systemDateTime.Now.Date.AddMonths(11); leaveCount.Count = 12; var proRataClass = MockRepository.GenerateMock&lt;ProRata&gt;(); var availableLeaveCount = proRataClass.Calculate(employee, systemDateTime.Now.Date, leaveCount); Assert.AreEqual(1, availableLeaveCount); } </code></pre>
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    1. USSaanch
    1. USSaanch
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    1. COIt's probably just easier to post the relevant code and tests that show what you're trying to do. It'll be easier for people to help.
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      1. USChris Mantle
    2. COI don't see how these `LeaveCategoryFactory` and your test method relate to each other at all. I assume `ProRata` is a class? Perhaps it implements `ILeaveCalculation`? One thing does instantly leap out, though: `LeaveCategoryFactory` is static. It's incredibly difficult to test *anything* when you have static classes around.
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      1. POStrategy pattern with Factory class Unit testing
      1. USChris Mantle
    3. COI would like to know what it the best option to create instance of Strategy pattern classes. if I use the static initiator how can I make sure the relevant classes are initiated?
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      1. POStrategy pattern with Factory class Unit testing
      1. USSaanch
 

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