def METHOD_NAME(self):
    f = SeqFeature(
        SimpleLocation(5, 20, strand=+1),
        type="region",
        qualifiers={"empty": None, "zero": 0, "one": 1, "text": "blah"},
    )
    record = SeqRecord(Seq("A" * 100), "dummy", features=[f])
    record.annotations["molecule_type"] = "DNA"
    gbk = record.format("gb")
    self.assertIn(" /empty\n", gbk)
    self.assertIn(" /zero=0\n", gbk)
    self.assertIn(" /one=1\n", gbk)
    self.assertIn(' /text="blah"\n', gbk)