t.Errorf("%q. unexpected error: %v", badTE, err)
			continue
		}

		wantBody := fmt.Sprintf("" +
			"HTTP/1.1 501 Not Implemented\r\nContent-Type: text/plain; charset=utf-8\r\n" +
			"Connection: close\r\n\r\nUnsupported transfer encoding")

		if string(gotBody) != wantBody {
			t.Errorf("%q. body\ngot\n%q\nwant\n%q", badTE, gotBody, wantBody)
		}
	}
}

	req.ContentLength = bodySize
	res, err := c.Do(req)
	if err := wantBody(res, err, "foo"); err != nil {
		t.Errorf("POST response: %v", err)
	}

	res, err = c.Get(ts.URL)
	if err := wantBody(res, err, "bar"); err != nil {
		t.Errorf("GET response: %v", err)
		return
	}
	getOkay = true  // suppress test noise