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POUnit testing passing arguments to base constructor
 

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    <p>I have the following code:</p> <pre><code> using System; using NUnit.Framework; using Rhino.Mocks; public class A { } public class B { } public interface IStatementExecutor { void Exec(string statement); } public abstract class Foo&lt;T&gt; { private readonly IStatementExecutor _statementExecutor; private readonly string _targetSegment; protected Foo(IStatementExecutor statementExecutor, string targetSegment) { _statementExecutor = statementExecutor; _targetSegment = targetSegment; } public void Update(T item) { _statementExecutor.Exec("sp_" + _targetSegment + "Update"); } } public class Bar : Foo&lt;A&gt; { public Bar(IStatementExecutor statementExecutor) : base(statementExecutor, "ATable") { } } public class Baz : Foo&lt;B&gt; { public Baz(IStatementExecutor statementExecutor) : base(statementExecutor, "BTable") { } } [TestFixture] public class Foo_Tests { [Test] public void Update_CallsStatementExecutorWithTableName() { const string tableName = "TestTable"; var mockStatementExecutor = MockRepository.GenerateMock&lt;IStatementExecutor&gt;(); mockStatementExecutor.Expect(m =&gt; m.Exec("sp_" + tableName + "Update")); var sut = MockRepository.GeneratePartialMock&lt;Foo&lt;A&gt;&gt;(mockStatementExecutor, tableName); var testModel = new A(); sut.Update(testModel); mockStatementExecutor.AssertWasCalled(m =&gt; m.Exec("sp_" + tableName + "Update")); } } </code></pre> <p>I already have unit tests for the base class <code>Foo&lt;T&gt;</code>. Since the base class is already covered, I don't want to write identical tests for the derived classes <code>Bar</code> and <code>Baz</code>. </p> <p>The only thing I really care about in the derived classes is that the correct string <code>target</code> is passed to the base class. </p> <p>I'm struggling on how to unit test this without breaking encapsulation of the derived classes or writing redundant unit tests. </p> <p>So, the question is, how do I test that the correct value gets passed to the base class from the derived classes for the <code>target</code> parameter?</p> <p>(If your answer is "use composition...", please back it up with a code sample modified from above.</p> <p>Thanks!</p>
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    1. USdrogon
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    1. COIs "ATable" hard-coded in your real situation? Is it a const?
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      1. USDavin Tryon
    2. COCould you please post your unit tests for the base class `Foo`? I see it is an `abstract` class (cannot create objects) and that `_target` is a private variable (not accessible in the test), curious to see how you were able to unit test it.
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      1. USChanns
    3. COfuther to @channs comment - Foo's methods are calling out to the console so how are you testing those?
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      1. USjames lewis
 

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