def test_save_file(self):
"""Save redirects to a JSON string in a file or file-like object."""
rd1 = Redirect('/one', '/two', 302)
rd2 = Redirect('/three', '/four', 302)
rd3 = Redirect('/five', '/six', 302)
rdf = RedirectsFile('/tmp/foo.json')
rdf.add_redirect(rd1)
rdf.add_redirect(rd2)
rdf.add_redirect(rd3)
json_file = StringIO()
json_file.write(json.dumps([rd.to_JSON() for rd in rdf.redirects]))
json_file.seek(0)
json_ofile = StringIO()
rdf.save_file(json_ofile)
json_ofile.seek(0)
assert json_file.read() == json_ofile.read()
