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POerror in testing dataset in C#
 

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  1. POerror in testing dataset in C#
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    <p>I have written a project by ASP.NET and C# which uses dataset for connecting to database. I want to test my code by when I create a unit test for my classes which use dataset I get following error: <br></p> <pre><code>Test method Test.CommodityRepositoryTest.GetCommoditiesTest threw exception: System.NullReferenceException: Object reference not set to an instance of an object. at Terminal.Database.TransportCo.TransportCoTableAdapters.ConfigurationTableAdapter.InitConnection() in TransportCoDataSet.Designer.cs: line 12259 at Terminal.Database.TransportCo.TransportCoTableAdapters.ConfigurationTableAdapter.get_Connection() in TransportCoDataSet.Designer.cs: line 12144 at Terminal.Database.TransportCo.TransportCoTableAdapters.ConfigurationTableAdapter.InitAdapter() in TransportCoDataSet.Designer.cs: line 12227 at Terminal.Database.TransportCo.TransportCoTableAdapters.ConfigurationTableAdapter.get_Adapter() in TransportCoDataSet.Designer.cs: line 12133 at Terminal.Database.TransportCo.TransportCoTableAdapters.ConfigurationTableAdapter.GetData() in TransportCoDataSet.Designer.cs: line 12290 </code></pre> <p>I have to mention that I use singleton repository but it does not change anything in the error.</p> <p>does anyone has any idea?</p> <p>these are my code and its test:</p> <pre><code>public List&lt;Commodity&gt; GetCommodities() { var commoditySet=new CommodityTableAdapter(); var commoditys = commoditySet.GetCommdity().ToList(); if (commoditys.Count() == 0) throw new UserInterfaceException("هیچ کالایی در سیستم ثبت نشده است"); var commoditiesName = new List&lt;Commodity&gt;(); for (int i = 0; i &lt; commoditys.Count(); i++) commoditiesName.Add(ConvertcommodityRowTocommodity(commoditys[i])); return commoditiesName; } [TestMethod()] public void GetCommoditiesTest() { var target = CommodityRepository.GetInstance(); // TODO: Initialize to an appropriate value var expected = new List&lt;Commodity&gt; {new Commodity() {HSCode = "323423", ID = 19}}; // TODO: Initialize to an appropriate value List&lt;Commodity&gt; actual = target.GetCommodities(); Assert.AreEqual(expected[0].ID, actual[0].ID); //Assert.Inconclusive("Verify the correctness of this test method."); } </code></pre>
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    1. COHow are we supposed to help you fix it without any code? The stack is helpful, but post the method too.
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    2. COwhat about now?
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