[
  // Test 0 -----------------------------------------
  {
    "input": {"foo": 4, "emptyState": [0, 1, 2, 3]},
    "output": {"foo": 4, "emptyState": ["abc"]},
    "states": [
      "EmptyState"
    ]
  },

  // Test 1 -----------------------------------------
  {
    "input": {"foo": 4},
    "output": {"foo": 4, "emptyState": ["abc"]},
    "states": [
      "EmptyState"
    ]
  }
]