test_settings.py 文件源码

def test_isolation_level_is_serializable(self):
        # Transactions *must* be SERIALIZABLE for the default connection.
        self.assertThat(
            connections.databases, ContainsDict({
                "default": ContainsDict({
                    "OPTIONS": ContainsDict({
                        "isolation_level": Equals(
                            ISOLATION_LEVEL_REPEATABLE_READ),
                    }),
                }),
            }),
        )