Before anything else, this fixes what seems to be an unrelated bug in the loaded table state isolation. The current package loaded state table save/restore functions were only working in one direction. The packages in the current package.loaded are restored to the state they were in at the save point, but anything that was in the save point but is no longer in the current package list (i.e. in the event of unloading a package, switching to a different version of the same package, or switching to a different isolation environment) would be left in because the keys from the save point are not iterated, only the keys from the current state.
After that, this (currently) takes the approach described in my comment here, only isolating 3rd party libraries loaded by Busted for it's own use, not Busted itself.
Fixes #643
Before anything else, this fixes what seems to be an unrelated bug in the loaded table state isolation. The current package loaded state table save/restore functions were only working in one direction. The packages in the current
package.loadedare restored to the state they were in at the save point, but anything that was in the save point but is no longer in the current package list (i.e. in the event of unloading a package, switching to a different version of the same package, or switching to a different isolation environment) would be left in because the keys from the save point are not iterated, only the keys from the current state.After that, this (currently) takes the approach described in my comment here, only isolating 3rd party libraries loaded by Busted for it's own use, not Busted itself.