61 lines
2.4 KiB
Markdown
61 lines
2.4 KiB
Markdown
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# Custom yield instructions
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By implementing this interface below, you can define custom yield instructions in **Edit Mode** tests.
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## IEditModeTestYieldInstruction
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In an Edit Mode test, you can use `IEditModeTestYieldInstruction` interface to implement your own instruction. There are also a couple of commonly used implementations available:
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- [EnterPlayMode](#enterplaymode)
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- [ExitPlayMode](#exitplaymode)
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- [RecompileScripts](./reference-recompile-scripts.md)
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- [WaitForDomainReload](./reference-wait-for-domain-reload.md)
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## Example
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```c#
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[UnityTest]
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public IEnumerator PlayOnAwakeDisabled_DoesntPlayWhenEnteringPlayMode()
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{
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var videoPlayer = PrefabUtility.InstantiatePrefab(m_VideoPlayerPrefab.GetComponent<VideoPlayer>()) as VideoPlayer;
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videoPlayer.playOnAwake = false;
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yield return new EnterPlayMode();
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var videoPlayerGO = GameObject.Find(m_VideoPlayerPrefab.name);
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Assert.IsFalse(videoPlayerGO.GetComponent<VideoPlayer>().isPlaying);
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yield return new ExitPlayMode();
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Object.DestroyImmediate(GameObject.Find(m_VideoPlayerPrefab.name));
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}
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```
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## Properties
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| Syntax | Description |
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| ---------------------------- | ------------------------------------------------------------ |
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| `bool ExpectDomainReload` | Returns `true` if the instruction expects a domain reload to occur. |
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| `bool ExpectedPlaymodeState` | Returns `true` if the instruction expects the Unity Editor to be in **Play Mode**. |
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## Methods
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| Syntax | Description |
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| ----------------------- | ------------------------------------------------------------ |
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| `IEnumerator Perform()` | Used to define multi-frame operations performed when instantiating a yield instruction. |
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## EnterPlayMode
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* Implements `IEditModeTestYieldInstruction`. Creates a yield instruction to enter Play Mode.
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* When creating an Editor test that uses the `UnityTest` attribute, use this to trigger the Editor to enter Play Mode.
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* Throws an exception if the Editor is already in Play Mode or if there is a [script compilation error](https://support.unity3d.com/hc/en-us/articles/205930539-How-do-I-interpret-a-compiler-error-).
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## ExitPlayMode
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* Implements `IEditModeTestYieldInstruction`. A new instance of the class is a yield instruction to exit Play Mode.
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* Throws an exception if the Editor is not in Play Mode.
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