req, _ := NewRequest("GET", "http://foo.com/", nil)
	req.Method = ""                                 // docs say "For client requests an empty string means GET"
	got, err := httputil.DumpRequestOut(req, false) // DumpRequestOut uses Transport
	if err != nil {
		t.Fatal(err)
	}
	if !strings.Contains(string(got), "GET ") {
		t.Fatalf("expected substring 'GET '; got: %s", got)
	}
}