Actions outside of tests

When writing tests, it is possible to avoid duplication of code by using the SetUp and TearDown methods built into NUnit. The Unity Test Framework has extended these methods with extra functionality, which can yield commands and skip frames, in the same way as UnityTest.

Action execution order

The actions related to a test run in the following order:

• Attributes implementing IApplyToContext
• Any attribute implementing OuterUnityTestAction has its BeforeTest invoked
• Tests with UnitySetUp methods in their test class
• Attributes implementing IWrapSetUpTearDown
• Any method with the [SetUp]) attribute
• Action attributes have their BeforeTest method invoked
• Attributes implementing IWrapTestMethod
  
• The test itself runs
• Action attributes have their AfterTest method invoked
• Any method with the TearDown attribute
• Tests with UnityTearDown methods in their test class
• Any OuterUnityTestAction has its AfterTest invoked

The list of actions is the same for both Test and UnityTest.

Execution order flow

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Domain Reloads

In Edit Mode tests it is possible to yield instructions that can result in a domain reload, such as entering or exiting Play Mode (see Custom yield instructions). When a domain reload happens, all non-Unity actions (such as OneTimeSetup and Setup) are rerun before the code, which initiated the domain reload, continues. Unity actions (such as UnitySetup) are not rerun. If the Unity action is the code that initiated the domain reload, then the rest of the code in the UnitySetup method runs after the domain reload.