Test the eclipse plugin #38
Description
Tycho does not run the regular maven surefire tests. Whilst we could make it do so, this would mean we can only test non-UI logic of which there isn't much. To test the UI, we'd need to make a separate org.metaborg.spoofax.shell.eclipse.test module, which would have the eclipse-test-plugin packaging type.
More information: https://wiki.eclipse.org/Tycho/Packaging_Types#eclipse-test-plugin, https://eclipse.org/tycho/sitedocs/tycho-surefire/tycho-surefire-plugin/test-mojo.html