{
  "valid": [
    "assignee = empty",
    "assignee != empty",
    "assignee = null",
    "assignee != null",
    "assignee = a",
    "assignee != a",
    "priority = 3",
    "priority != 3",
    "temperature = -5",
    "temperature != -5",
    "assignee = currentUser()",
    "assignee != currentUser()"
  ],
  "invalid": [
    "assignee",
    "assignee =",
    "assignee !=",
    "assignee ! = empty",
    "assignee = (a, b)",
    "assignee != (a, b)",
    "assignee = a after -1w",
    "assignee != a after -1w",
    "assignee = a before -1w",
    "assignee != a before -1w",
    "assignee = a on -1w",
    "assignee != a on -1w",
    "assignee = a during (-1w, now())",
    "assignee != a during (-1w, now())",
    "assignee = a by b",
    "assignee != a by b",
    "assignee = a from b",
    "assignee != a from b",
    "assignee = a to b",
    "assignee != a to b"
  ]
}