def test_packages(self):
dto_handler = DTOHandler()
pkgs = Packages("env", ["pkg1", "pkg2"])
dto_handler._packages(pkgs)
pkgs = Packages("env", ["pkg3", "pkg4"])
dto_handler._packages(pkgs)
self.assertEquals(["pkg1", "pkg2", "pkg3", "pkg4"],
dto_handler.expected_packages.packages("env"))
