Method test_vary_already_present

tornado/test/web_test.py:1946–1952

(self)

        self.assertEqual(response.headers["Vary"], "Accept-Encoding")

    def test_vary_already_present(self):
        response = self.fetch("/?vary=Accept-Language")
        self.assert_compressed(response)
        self.assertEqual(
            [s.strip() for s in response.headers["Vary"].split(",")],
            ["Accept-Language", "Accept-Encoding"],
        )

    def test_vary_already_present_multiple(self):
        # Regression test for https://github.com/tornadoweb/tornado/issues/1670