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POUnit Testing With Computer Owned States
 

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    <p>I am writing a unit test for when my computer receives/makes a phone call.</p> <p>The methods being tested are the events that handle the incoming/outgoing call. If the caller is not an approved caller then the call is rejected.</p> <p>The code works fine, but I can't really find anything to test against for my unit test. The problem is that the actual state of "if my computer is in a call or not" is <strong>not</strong> controlled my by class. Only the computer knows if a call is currently connected or not.</p> <p>I am hoping that there are some Unit Test Guru's out there than can tell me what to do to test this scenario. I do not want to create a dummy var that has no relation to my code just to make my unit test pass.</p> <p>To make this a bit more concrete here is my unit test:</p> <pre><code> private DeviceMediator deviceMediator; private IDeviceControlForm deviceControlForm; private IDataAccess data; private ICallMonitor callMonitor; // Use TestInitialize to run code before running each test [TestInitialize()] public void MyTestInitialize() { deviceControlForm = MockRepository.GenerateStub&lt;IDeviceControlForm&gt;(); data = MockRepository.GenerateStub&lt;IDataAccess&gt;(); callMonitor = MockRepository.GenerateStub&lt;ICallMonitor&gt;(); deviceMediator = new DeviceMediator(deviceControlForm, data) {CallMonitor = callMonitor}; } [TestMethod] public void TestHandleIncomingCall() { //Arrange //Act deviceMediator.OnIncomingCall(null, new CallState(), new CallInfoState()); //Assert // I could not find anything to feasably test on this. Assert.IsTrue(true); } </code></pre> <p>and here is the method it is calling:</p> <pre><code>public void OnIncomingCall(Call call, CallState callState, CallInfoState callInfoState) { // See if this call is on our list of approved callers bool callApproved = false; foreach (PhoneContact phoneContact in Whitelist) { if (phoneContact.PhoneNumber == call.CallerID) callApproved = true; } // If this is not an approved call then if (!callApproved) CallMonitor.Hangup(); } </code></pre>
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    1. COCan you elaborate on what your Call, CallState and CallInfoState classes do?
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    2. COIn rhis case they are doing nothing. When in a real call they would have the call info and the handle the call. I am using them for is to get the current caller number (which I just realized I am not feeding into my unit test). They are not read by anything else so I could not use them to get a value back out (and they are not passed by reference)
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