(namespace tests.option
  (test.case "option.ok"
    (seq
      (def opt (option.ok 42))
      (assert.ok! (option.ok? opt))
      (assert.eq! (vec.get opt 1) 42)
    )
  )

  (test.case "option.err"
    (seq
      (def opt (option.err "error"))
      (assert.ok! (option.err? opt))
      (assert.eq! (vec.get opt 1) "error")
    )
  )

  (test.case "option.ok?"
    (assert.ok! (option.ok? (option.ok 1)))
    (assert.not! (option.ok? (option.err "x")))
  )

  (test.case "option.err?"
    (assert.ok! (option.err? (option.err "x")))
    (assert.not! (option.err? (option.ok 1)))
  )

  (test.case "option.option?"
    (assert.ok! (option? (option.ok 1)))
    (assert.ok! (option? (option.err "x")))
    (assert.not! (option? [1 2]))
  )
)