[
  [
    "/old",
    "/new"
  ],
  [
    "/start",
    "/mid"
  ],
  [
    "/mid",
    "/final"
  ],
  [
    "/loop-a",
    "/loop-b"
  ],
  [
    "/loop-b",
    "/loop-a"
  ],
  [
    "/same",
    "/same"
  ],
  [
    "/ambiguous",
    "/one"
  ],
  [
    "/ambiguous",
    "/two"
  ],
  [
    "/upstream",
    "/ambiguous"
  ],
  [
    "//elsewhere.test",
    "/new"
  ],
  [
    "/query?x=1",
    "/new"
  ]
]