schema:
  version: 1
  type: array
  uniqueItems:
    - foo
  items:
    properties:
      - foo:
         type: string
      - bar:
         type: string
tests:
  - valid: false
    description: Must be invalid if foo isn't unique
    data:
      - foo: equals
        bar: hallo
      - foo: equals
        bar: hi
  - valid: true
    description: Must be valid if foo is unique, but bar isn't
    data:
      - foo: hallo
        bar: baz
      - foo: hi
        bar: baz