t.Fatalf("response 1 addr = %q; want %q", g, e)
	}
}

// TestHeadResponses verifies that all MIME type sniffing and Content-Length
// counting of GET requests also happens on HEAD requests.
func TestHeadResponses(t *testing.T) { run(t, testHeadResponses) }
func testHeadResponses(t *testing.T, mode testMode) {
	cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {