A simple Godot addon that adds a extra run mode to the editor. When pressing the "run test scene" button for the first time, a file dialog will allow you to choose a different scene in the project as test scene. When this run test scene button is pressed later it will run the test scene instead of the current scene. This can be helpfull if your scene in itself is not playable (has no camera or environment for example) you can still test its behaviour wihout having to start the main scene and traverse through the whole game or having to find the correct scene in "run specific scene".
First enable the addons in project settings. After enabling it an additional button will appear.
When pressing the "run test scene" button the first time for a given scene or when right clicking it a file dialog appears asking to assign the test scene. This can be any scene, but its intention is that the current scene is a child of the test scene or the test scene is an inherited scene from the current.
When pressing the "run test scene" button when the test scene is set up it will just start this test scene instead of the current one. However you will see that it appears if the "run custom scene" is pressed. That is just because in under the hood it actually is. Also you can see that the test scene path is saved as meta data on the root node of the current scene. If you want to remove the test scene just remove the meta data label.
If the path of the test scene is changed, it will be removed on pressing "run test scene" and you will be prompted point to the new location.