// std.string smoke: length/concat/slice/index_of/equals
static box Main {
  main() {
    local S
    S = include "apps/std/string.nyash"
    local fails
    fails = 0

    // length
    if S.string_length("abc") != 3 { fails = fails + 1 }
    if S.string_length("") != 0 { fails = fails + 1 }

    // concat
    if S.string_concat("a", "b") != "ab" { fails = fails + 1 }
    if S.string_concat("", "x") != "x" { fails = fails + 1 }

    // slice (clamp + basic)
    if S.string_slice("hello", 1, 4) != "ell" { fails = fails + 1 }
    if S.string_slice("hi", -5, 5) != "hi" { fails = fails + 1 }
    if S.string_slice("x", 0, 0) != "" { fails = fails + 1 }

    // index_of
    if S.string_index_of("banana", "na") != 2 { fails = fails + 1 }
    if S.string_index_of("banana", "zz") != -1 { fails = fails + 1 }
    if S.string_index_of("abc", "") != 0 { fails = fails + 1 }

    // equals
    if S.string_equals("a", "a") != 1 { fails = fails + 1 }
    if S.string_equals("a", "b") != 0 { fails = fails + 1 }

    if fails == 0 {
      print("OK: string")
      return 0
    }
    print("FAIL: string (" + fails.toString() + ")")
    return 1
  }
}