53 lines
2.6 KiB
Markdown
53 lines
2.6 KiB
Markdown
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# Edit Mode vs. Play Mode tests
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Let’s clarify a bit what Play Mode and Edit Mode test means from the Unity Test Framework perspective:
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## Edit Mode tests
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**Edit Mode** tests (also known as Editor tests) are only run in the Unity Editor and have access to the Editor code in addition to the game code.
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With Edit Mode tests it is possible to test any of your [Editor extensions](https://docs.unity3d.com/Manual/ExtendingTheEditor.html) using the [UnityTest](./reference-attribute-unitytest.md) attribute. For Edit Mode tests, your test code runs in the [EditorApplication.update](https://docs.unity3d.com/ScriptReference/EditorApplication-update.html) callback loop.
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> **Note**: You can also control entering and exiting Play Mode from your Edit Mode test. This allow your test to make changes before entering Play Mode.
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Edit Mode tests should meet one of the following conditions:
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* They should have an [assembly definition](./workflow-create-test-assembly.md) with reference to *nunit.framework.dll* and has only the Editor as a target platform:
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```assembly
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"includePlatforms": [
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"Editor"
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],
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```
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* Legacy condition: put tests in the project’s [Editor](https://docs.unity3d.com/Manual/SpecialFolders.html) folder.
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## Play Mode tests
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You can run **Play Mode** tests as a [standalone in a Player](./workflow-run-playmode-test-standalone.md) or inside the Editor. Play Mode tests allow you to exercise your game code, as the tests run as [coroutines](https://docs.unity3d.com/ScriptReference/Coroutine.html) if marked with the `UnityTest` attribute.
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Play Mode tests should correspond to the following conditions:
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* Have an [assembly definition](./workflow-create-test-assembly.md) with reference to *nunit.framework.dll*.
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* Have the test scripts located in a folder with the .asmdef file.
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* The test assembly should reference an assembly within the code that you need to test.
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```assembly
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"references": [
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"NewAssembly"
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],
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"optionalUnityReferences": [
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"TestAssemblies"
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],
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"includePlatforms": [],
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```
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## Recommendations
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### Attributes
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Use the [NUnit](http://www.nunit.org/) `Test` attribute instead of the `UnityTest` attribute, unless you need to [yield special instructions](./reference-custom-yield-instructions.md), in Edit Mode, or if you need to skip a frame or wait for a certain amount of time in Play Mode.
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### References
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It is possible for your Test Assemblies to reference the test tools in `UnityEngine.TestRunner` and `UnityEditor.TestRunner`. The latter is only available in Edit Mode. You can specify these references in the `Assembly Definition References` on the Assembly Definition.
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