if !strings.HasPrefix(string(slurp), wantPrefix) {
		t.Errorf("response = %q; wanted prefix %q", slurp, wantPrefix)
	}
}

// Issue 15908
func TestAutomaticHTTP2_Serve_NoTLSConfig(t *testing.T) {
	testAutomaticHTTP2_Serve(t, nil, true)
}

func TestAutomaticHTTP2_Serve_NonH2TLSConfig(t *testing.T) {
	testAutomaticHTTP2_Serve(t, &tls.Config{}, false)
}