In NUnit we have Test Fixtures containing Tests. If we run all the tests now, you'll see the test that we marked explicit is ignored, But if I go and specifically run that test, you can see that it's executed and still passes. Let’s look at NUnit report generation and how seamlessly you can integrate the NUnit reporting tool in the test implementation. A Test Fixture is the class that contain the tests we want to run. We add the attribute [TestFixture] to the class which hosts the Test Methods. To discover or execute test cases, VSTest would call the test adapters based on your project configuration. There are a few restrictions on a class that is used as a setup fixture. When to use:when you want a clean test context for every test (sharing the setup and cleanup code, without sharing the object instance). In NUnit (and in VbUnit), test fixture refers to the Testcase Class on which the Test Methods are implemented. From the NUnit website, we got the explanation for SetUpFixture as: Reference start------------------------------------------------------------------------------ Reference end-------------------------------------------------------------------------------------- But what is exactly the "under a given namespace" means? Of the lot, NUnit is the most-used test automation framework for all.Net languages. For that purpose go to the File menu and select Open Project, now choose the Test case DLL or EXE file, and Unit Test case process is ready to execute as described in the following. The extensibility model of NUnit, made the migration to NUnit cumbersome, to say the least.Recently, Gert Jansen van Rensburg, made the first serious attempt to solve this. So NUnit.TestAdapter exists for that purposes. The slight downside here is in terminology, that the static class is what NUnit considers to be the fixture but the real fixture is the nested class. [Ignore] The tests and test fixtures with Ignore attribute will not run which running all the tests in test explorer. Fixtures Allows defining a fixed, specific states of data (fixtures) that are test-local. test fixture for … MsTest only adds this ability in visual studio 2010 IDE Lifecycle of a test fixture As mentioned before, NUnit gives the developer the possibility to extract all initialization and tear-down code that multiple tests might be sharing into ad-hoc methods. e.g. General Model In general, xUnit frameworks: • Use classes to group related tests • Have a way to distinguish test case methods from helper methods • Some depend on annotations — @Test in JUnit 4.x, [Test] in NUnit. (That is why NUnit/xUnit/MSTest all ask you to install a test adapter NuGet package to your unit testing projects). NUnit reports can serve as a considerable value addition to the tests performed using the said framework. NUnit itself implements the testing frameworks and its contracts. . 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