t.Fatalf("expected error")
			}

			if !reflect.DeepEqual(got, test.want) {
				t.Errorf("wanted=%#v, got=%#v", test.want, got)
			}
		})
	}
}

type errTransport string

func (e errTransport) RoundTrip(_ *http.Request) (*http.Response, error) {
	return nil, fmt.Errorf("%s", e)
}

func testContext(t *testing.T) context.Context {