if tt.MustError {
			req := freshReq(tt)
			_, err := DumpRequestOut(req, !tt.NoBody)
			if err == nil {
				t.Errorf("DumpRequestOut #%d: expected an error, got nil", i)
			}
			continue
		}

		if tt.WantDumpOut != "" {
			req := freshReq(tt)
			dump, err := DumpRequestOut(req, !tt.NoBody)
			if err != nil {
				t.Errorf("DumpRequestOut #%d: %s", i, err)
				continue
			}

	}
	if !sawGood {
		t.Fatalf("writeCalls constant is outdated in test")
	}
}

// dumpRequestOut is a modified copy of net/http/httputil.DumpRequestOut.
// Unlike the original, this version doesn't mutate the req.Body and
// try to restore it. It always dumps the whole body.
// And it doesn't support https.
func dumpRequestOut(req *Request, onReadHeaders func()) ([]byte, error) {

	origAuth := req.Header.Get("Authorization")
	if origAuth != "" {
		req.Header.Set("Authorization", "**REDACTED**")
	}

	// Only display request header.
	reqTrace, err := httputil.DumpRequestOut(req, false)
	if err != nil {
		return
	}

	// Write request to trace output.
	_, err = fmt.Fprint(c.TraceOutput, string(reqTrace))
	if err != nil {
		return
	}