# Creating a Testing Tool in Processing - Need Help Adding a New Sketch Tab and Run Button

**URL:** https://discourse.processing.org/t/creating-a-testing-tool-in-processing-need-help-adding-a-new-sketch-tab-and-run-button/42799
**Category:** Development
**Created:** [September 20, 2023, 3:18am UTC](https://discourse.processing.org/t/creating-a-testing-tool-in-processing-need-help-adding-a-new-sketch-tab-and-run-button/42799 "2023-09-20T03:18:08Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![NebulaNine](https://avatars.discourse-cdn.com/v4/letter/n/f08c70/32.png) [@NebulaNine](https://discourse.processing.org/u/NebulaNine)
#### Post date: [September 20, 2023, 3:18am UTC](https://discourse.processing.org/t/creating-a-testing-tool-in-processing-need-help-adding-a-new-sketch-tab-and-run-button/42799/1 "2023-09-20T03:18:08Z")

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I’m currently working on a project to develop a simple testing tool for Processing, and I’ve run into a bit of a roadblock. Here’s what I’m trying to achieve:

1. **Adding a New Sketch Tab:** I want the tool to seamlessly add a new sketch tab where users can write test cases for their sketches.
2. **Incorporating a ‘Run’ Button:** Additionally, I’d like to include a ‘Run’ button within the Processing IDE that allows users to execute the test tool.

I’ve used the `addFile()` method, but it seems to add existing files to the project. When I attempt to use Java files, I encounter errors when running the tool in Processing. I’ve also come across a post by quark who was attempting something similar, but the information provided wasn’t quite enough for me to figure it out.

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### Author: ![mnse](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/mnse/32/16520_2.png) [@mnse](https://discourse.processing.org/u/mnse)
#### Post date: [September 20, 2023, 7:02am UTC](https://discourse.processing.org/t/creating-a-testing-tool-in-processing-need-help-adding-a-new-sketch-tab-and-run-button/42799/2 "2023-09-20T07:02:47Z")

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Hi @NebulaNine,

Sounds interesting, but would you please explain a bit more how you envision the process ?  
I mean, what should the tests cover, or how should the test cases interact with the to testable sketch ?  
Maybe you could outline this so that one can understand your intention a bit better?

Cheers  
— mnse