(strings/index-of banana ana)
(strings/index-of banana ana 2)
(strings/index-of banana ana -3)
(strings/index-of banana ana 9)
(strings/index-of 🙂a🙂b b)
(strings/index-of é é)
(strings/index-of ABC a)
(strings/index-of abc "" 99)
(strings/index-of abc "" -9)
(strings/index-of "" "")
(strings/index-of abc b 9223372036854775807)
(strings/index-of abc "" 9223372036854775807)