$ copy-file changes/build.sbt build.sbt
> reload

# ensure that a new global dependency gets picked up
$ copy-file changes/global-plugins.sbt global/plugins/plugins.sbt
> reload

# check that the class can be loaded
> eval Class.forName("org.junit.Test")

# check that it is on the classpath
> eval (x => ()) : (org.junit.Test => Unit)

# ensure that the global plugin version is overridden by the local version
# (because it's older)
$ copy-file changes/plugins.sbt project/plugins.sbt
> reload
> check
