Use TransformingClassLoader in Tests and Write Data-Driven Enum Extension Tests

[shartte]

Change config key from enumExtender to enumExtensions since this is still the chance to have it named according to what the setting does.
The JSON file only contains extensions to enums in a declarative manner, which means enumExtensions is a better name.

[neoforged-pr-publishing]

• Publish PR to GitHub Packages

Last commit published: 1e7f2c69dff6dee8426660d48274bb7434eaa616.

PR Publishing

The artifacts published by this PR:

• 📦 net.neoforged.fancymodloader:junit-fml:4.0.12-pr-163-enumtest
• 📦 net.neoforged.fancymodloader:earlydisplay:4.0.12-pr-163-enumtest
• 📦 net.neoforged.fancymodloader:loader:4.0.12-pr-163-enumtest

Repository Declaration

In order to use the artifacts published by the PR, add the following repository to your buildscript:

repositories {
    maven {
        name 'Maven for PR #163' // https://github.com/neoforged/FancyModLoader/pull/163
        url 'https://prmaven.neoforged.net/FancyModLoader/pr163'
        content {
            includeModule('net.neoforged.fancymodloader', 'junit-fml')
            includeModule('net.neoforged.fancymodloader', 'earlydisplay')
            includeModule('net.neoforged.fancymodloader', 'loader')
        }
    }
}