Method safe_exec

tests/migrations/test_writer.py:271–282

(self, string, value=None)

            return cls.X

    def safe_exec(self, string, value=None):
        d = {}
        try:
            exec(string, globals(), d)
        except Exception as e:
            if value:
                self.fail(
                    "Could not exec %r (from value %r): %s" % (string.strip(), value, e)
                )
            else:
                self.fail("Could not exec %r: %s" % (string.strip(), e))
        return d

    def serialize_round_trip(self, value):
        string, imports = MigrationWriter.serialize(value)