If multiple threads are in use, a test may be started while some earlier tests are still being run. You may have tests that only need to be run on certain operating systems or on certain .NET versions. Test Fixture ordering. Ugly, but it works. We can do this using the [Category] attribute on either tests or fixtures. You can use the [Order] attribute on both tests and fixtures, and just pass in an integer for the order of which you want them executed. There is no facility in NUnit to order tests globally. It also means having the flexibility to run tests in ways that best help inform our teams, while minimizing distractions from non-relevant information. If you actually look at the source on GitHub, you can find the actual list inside the platform helper class. Creating a NUnit test project. SetUpFixtureAttribute (NUnit 2.4) This is the attribute that marks a class that contains the one-time setup or teardown methods for all the test fixtures under a given namespace. The class may contain at most one method marked with the SetUpAttribute and one method marked with the TearDownAttribute. For test cases (methods) ordering applies within the containing fixture. In order for NUnit to instantiate the fixture, you must either specify the types to be used as arguments to TestFixtureAttribute or use the named parameter TypeArgs= to specify them. If you have a problem in one test, how does that affect the other tests? The class may contain at most one method marked with the SetUpAttribute and one method marked with the TearDownAttribute. This makes the constructor a convenient place to put reusable context setup code where you want to share the code without sharing object instances (meaning, you get a clean copy of the context object(s… Testing NUnit C# testing nunit NUnit TestFixture attribute is a class level attribute and it indicates that this class contains NUnit Test Methods. Note that with NUnit 3, the reason must be specified. 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. In order to set-up fixture ordering, derive a class from TestOrderingSpecification. That is, OrderAttribute would be used for tests within a fixture (or fixtures in a namespace) that have some intrinsic reason for running ahead of the rest in a certain order all the time. You can order both test fixtures and the methods within fixtures themselves. Now you can import the namespace of Nunit, NUnit.framework. Even by most conservative estimations, test fixture classes tend to be multiple times bigger than the tested component. AutoFixture makes it easier for developers to do Test-Driven Development by automating non-relevant Test Fixture Setup, allowing the Test Developer to focus on the essentials of each test case. Using SetUpFixture. xUnit.net creates a new instance of the test class for every test that is run, so any code which is placed into the constructor of the test class will be run for every single test. NUnit also provides the [Ignore] attribute. Using Until ignored test will continue to get a warning result until the specified date has passed. So, for example, the first test will use the first value in each of the values attributes. If we run all the tests now, you'll see the test that we marked explicit is ignored. However, an ITestCollection is not neccessarily associated with a specific class, so to to use attributes to order them you need to use a little reflection. This prevents important set-up code from running. By default, NUnit runs tests in each fixture alphabetically. To use it, we add the attribute to a test or fixture, and in NUnit 3 and above, we're required to include a reason. And to use it you must pass a String that can be parsed into a date. The following tests will be run in the order: As stated, ordering is local to the test that contains the ordered tests. In order for NUnit to instantiate the fixture, you must either specify the types to be used as arguments to TestFixtureAttribute or use the named parameter TypeArgs= to specify them. And you can see the outcome was “None”, with the error message “Not supported on MacOSX”. And to use this, we just add the `[Category] attribute and include a category name. TL;DR. Per the NUnit docs, the test should be skipped and not affect the outcome of the test run at all. And this can be applied to tests, or test fixtures as a whole. We also need to let the Nunit framework know that this class is a fixture, so we simple add a [TestFixture ()] attribute on top of the class name. Trick by implementing an ITestCollectionOrderer for this purpose be executed for some reason for providing a reason Explicit... 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