I like the test package tree to mirror the main package tree, so test classes should be placed into the same packages as the classes they're testing. It helps them to have access to package-internal stuff if they really need to, and also helps to find them in the package tree.
Also plugins.HelperPlugin package seems to be named inconsistently; I've fixed that.
I like the test package tree to mirror the main package tree, so test classes should be placed into the same packages as the classes they're testing. It helps them to have access to package-internal stuff if they really need to, and also helps to find them in the package tree.
Also
plugins.HelperPlugin
package seems to be named inconsistently; I've fixed that.