Unity Testing LoadSceneAttribute

LoadSceneAttribute.cs

public class LoadSceneAttribute : NUnitAttribute, IOuterUnityTestAction {
    readonly string scene;
    
    public LoadSceneAttribute(string scene) => this.scene = scene;

    public IEnumerator BeforeTest(ITest test) {
        Debug.Assert(scene.EndsWith(".unity"), "Scene must end with .unity");
        yield return EditorSceneManager.LoadSceneInPlayMode(scene, new LoadSceneParameters(LoadSceneMode.Single));
    }

    public IEnumerator AfterTest(ITest test) {
        yield return null;
    }
}