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POFaking an enumerator in FakeItEasy
 

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    <p>How can I create a fake with <a href="http://code.google.com/p/fakeiteasy/" rel="nofollow">FakeItEasy</a> that allows different return values on successive calls. This is one example of what I would like to be able to do:</p> <pre><code>var enumerator = A.Fake&lt;IDictionaryEnumerator&gt;(); A.CallTo(() =&gt; enumerator.MoveNext()).Returns(true); //Expected value for first call A.CallTo(() =&gt; enumerator.Key).Returns("key1"); A.CallTo(() =&gt; enumerator.Value).Returns("value1"); A.CallTo(() =&gt; enumerator.MoveNext()).Returns(false); //Expected value for second call Assert.IsTrue(enumerator.MoveNext()); //Fails Assert.IsFalse(enumerator.MoveNext()); </code></pre> <p>The assertion will fail since it the last set up of MoveNext will overwrite the first one.</p> <p>Is it possible to do what I want in <a href="http://code.google.com/p/fakeiteasy/" rel="nofollow">FakeItEasy</a>?</p> <p>.</p> <p><strong>[Edit]</strong><br> Clarified the original question's example and provided a working example below.</p> <p>Based on Patrik's answer this code shows how you can set up the fake. The trick is to reverse all setups and use <code>Once()</code>.</p> <pre><code>var enumerator = A.Fake&lt;IDictionaryEnumerator&gt;(); A.CallTo(() =&gt; enumerator.MoveNext()).Returns(false).Once(); A.CallTo(() =&gt; enumerator.MoveNext()).Returns(true).NumberOfTimes(2); A.CallTo(() =&gt; enumerator.Key).Returns("key2").Once(); A.CallTo(() =&gt; enumerator.Value).Returns("value2").Once(); A.CallTo(() =&gt; enumerator.Key).Returns("key1").Once(); A.CallTo(() =&gt; enumerator.Value).Returns("value1").Once(); while(enumerator.MoveNext()) { Debug.WriteLine(enumerator.Key + ": "+ enumerator.Value); } </code></pre> <p>This will print:</p> <pre><code>key1: value1 key2: value2 </code></pre>
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