1..7
# ->getCatalogueByDir()
ok 1 - ->getCatalogueByDir() returns catalogues by directory
# ->getCatalogueList()
ok 2 - ->getCatalogueByDir() returns all catalogues for the current culture
# ->getSource()
ok 3 - ->getSource() returns the full path name to a specific variant
# ->isValidSource()
ok 4 - ->isValidSource() returns false if the source is not valid
ok 5 - ->isValidSource() returns true if the source is valid
# ->getLastModified()
ok 6 - ->getLastModified() returns 0 if the source does not exist
ok 7 - ->getLastModified() returns the last modified time of the source
# Looks like everything went fine.