Less not compiled in Grails 3.3.12 functional tests

[azavisha-snap]

Steps to reproduce:

• Create a new Grails 3.3.12 project
• Add assets "com.bertramlabs.plugins:less-asset-pipeline:2.15.1" to dependencies in build.gradle
• Rename assets/stylesheets/application.css to assets/stylesheets/application.less
• Update the corresponding import to <asset:stylesheet src="application.less"/> in main.gsp layout
• Create a simple Geb test that goes to the home page
• Set geb environment to 'chrome' (not headless)
• Run the integrationTest gradle task

Expected result:

• Home page must look the same as the new project before application.css was renamed to .less

Actual result:

• asset:stylesheet tag does not generate a stylesheet link on the page
• /assets/application.css is not found

Note that everything works fine in bootRun mode. The issue is only with functional tests.

Tried versions of asset-pipeline from 2.15.1 to 3.2.4. Same result in all of them.

[azavisha-snap]

This is a very big problem that broke most of our functional tests after upgrading to Grails 3.

I believe the issue is that the following line does not do what it is supposed to in integration/functional tests:

assets "com.bertramlabs.plugins:less-asset-pipeline:2.15.1"

Replacing the assets scope/configuration with runtime like so seems to help:

runtime "com.bertramlabs.plugins:less-asset-pipeline:2.15.1"

[azuledu]

Adding testCompile "com.bertramlabs.plugins:less-asset-pipeline:2.15.1" works