Upgrading to NUnit 3.0 - OneTimeSetUp: SetUpAttribute attribute not allowed in a SetUpFixture

After upgrading to NUnit 3.0, which became recently available, some of my tests started to fail.

When I look at the test results, they all failed with the following error message:

SetUpAttribute attribute not allowed in a SetUpFixture

In NUnit 3.0, there are some breaking changes regarding the usage of the SetUpAttribute and the SetUpFixture.  You can no longer use the SetUpAttribute and TearDownAttribute inside a SetUpFixture. Instead you have to use the OneTimeSetUpAttribute and OneTimeTearDownAttribute.

In NUnit 2.0, I had the following code:

	[SetUpFixture]
	class TestHost
	{
	[SetUp]
	public static void AssemblyInitalize()
	{
	//Global initialization logic here
	}
	}

view raw nunit20setupfixture.cs hosted with ❤ by GitHub

In NUnit 3.0, this has to change to:

	[SetUpFixture]
	class TestHost
	{
	[OneTimeSetUp]
	public static void AssemblyInitalize()
	{
	//Global initialization logic here
	}
	}

view raw nunit30setupfixture.cs hosted with ❤ by GitHub

More information can be found here:

• https://github.com/nunit/nunit/wiki/SetUp-and-TearDown-Changes
• https://github.com/nunit/nunit/wiki/Breaking-Changes