t.Errorf("body = %q; want %q", got, wantBody)
	}
}

// Issue 17494: cookies should be altered when Client follows redirects.
func TestClientAltersCookiesOnRedirect(t *testing.T) { run(t, testClientAltersCookiesOnRedirect) }
func testClientAltersCookiesOnRedirect(t *testing.T, mode testMode) {
	cookieMap := func(cs []*Cookie) map[string][]string {
		m := make(map[string][]string)
		for _, c := range cs {