Internal resources for plugins are not isolated

[Thorinwasher]

Is there an existing issue for this?

• I have searched the existing issues

Are you using the latest version of MockBukkit?

• I am using the latest version of MockBukkit.

Minecraft Version

1.20.2

Describe the bug

One common internal file for plugins is the config.yml. Whenever the default config is saved, this internal file is used. What I understand from class loading, these internal files are linked with a package name and a classloader. The issue that arrives here is that when multiple plugins are loaded which share the same path for an internal file. Then currently for MockBukkit only one of these instances is possible to get whenever that internal file is fetched. So to say, one of the plugins will get the internal file from the other plugin.

Reproducible Test

@Test
void aTest()
{
    JavaPlugin plugin1 = MockBukkit.load(Plugin1);
    JavaPlugin plugin2 = MockBukkit.load(Plugin2);
    assertDoesNotHaveSameContent(plugin1.class.getResourceAsStream("config.yml"),
        plugin2.class.getResourceAsStream("config.yml")))
}

Anything else?

One solution would be to have the plugins load from completely separate class loaders, this should isolate the resource, therefore avoiding the issue

I have no clue how to do this though. As everything is already loaded by the SystemClassLoader (or whatever it's called) to run the test, i.e. before triggering the MockBukkit#load() command.

[Thorinwasher]

• Fixed for MockBukkit#load(...)
• Fixed for MockBukkit#loadJar(...)