{
  "function": "viewerKey",
  "cases": [
    {"name":"ArrowRight-is-next","args":["ArrowRight"],"expected":{"tag":"Next"}},
    {"name":"d-is-next","args":["d"],"expected":{"tag":"Next"}},
    {"name":"D-is-next","args":["D"],"expected":{"tag":"Next"}},
    {"name":"ArrowLeft-is-prev","args":["ArrowLeft"],"expected":{"tag":"Prev"}},
    {"name":"a-is-prev","args":["a"],"expected":{"tag":"Prev"}},
    {"name":"A-is-prev","args":["A"],"expected":{"tag":"Prev"}},
    {"name":"Home-is-first","args":["Home"],"expected":{"tag":"First"}},
    {"name":"End-is-last","args":["End"],"expected":{"tag":"Last"}},
    {"name":"space-toggles-play","args":[" "],"expected":{"tag":"TogglePlay"}},
    {"name":"ArrowUp-is-not-bound","args":["ArrowUp"],"expected":null},
    {"name":"r-is-not-bound","args":["r"],"expected":null},
    {"name":"constructor-is-not-bound","args":["constructor"],"expected":null},
    {"name":"toString-is-not-bound","args":["toString"],"expected":null},
    {"name":"empty-string-is-not-bound","args":[""],"expected":null}
  ]
}