Allow test sketches to be outside examples folder

[aliphys]

Describe the request

The linter should allow for sketches outside of the examples folder to be within spec. Main reason, is to keep two types of .ino files seperate based on their functionality

• Example sketches -> These showcase the functionality of the library and have practical and/or pedagogical value
• Test sketches -> These are meant to strain the compile-sketches.yml workflow to the limit, as part of continuous testing (CT) procedures.

Including test sketches, which have no/little pedagogical value, will increase the complexity of the user experience. Advanced users can always see the test sketches in the repository or local installation of the library.

Describe the current behavior

According to Rule LD003, the linter does not allow for sketches outside the examples folder in the root directory of the library.

arduino-lint/internal/rule/ruleconfiguration/ruleconfiguration.go

Lines 1308 to 1311 in 9363101

	ID: "LD003",
	Brief: "stray sketch",
	Description: "A sketch was found outside the library's `examples` and/or `extras` subfolders. Example sketches must be placed in the standardized location.",
	MessageTemplate: "Sketch(es) found outside examples and extras folders:\n{{.}}",

Arduino Lint version

arduino/arduino-lint-action@v1

Operating system

N/A

Operating system version

runs-on: ubuntu-latest

Additional context

Running Linter via check-arduino.yml workflow kindly provided by @per1234

Issue checklist

• I searched for previous requests in the issue tracker
• I verified the feature was still missing when using the latest version
• My request contains all necessary details

[per1234]

Thanks for your suggestion, but the current configuration of the rule is as intended. If you want to add test sketches to the library, please put them under the extras folder as suggested by the rule message.

There is a proposal for adding a dedicated folder for test files to the Arduino Library Specification:

arduino/arduino-cli#990

However, the rule would only be adjusted if that proposal was accepted.