t.Errorf("%s Accept-Encoding = %q; want empty", r.Proto, ae)
			}
		},
	}.run(t)
}

// Test304Responses verifies that 304s don't declare that they're
// chunking in their response headers and aren't allowed to produce
// output.
func Test304Responses(t *testing.T) { run(t, test304Responses) }
func test304Responses(t *testing.T, mode testMode) {
	cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {