Advent-of-Code-2025/day_2/test/day_2_test.gleam

import day_2
import gleeunit

pub fn main() -> Nil {
  gleeunit.main()
}

pub fn trivial_digits_test() {
  assert day_2.int_to_half_length_pair(1) == Ok(#([], [1]))
}

pub fn two_digit_number_test() {
  assert day_2.int_to_half_length_pair(12) == Ok(#([1], [2]))
}

pub fn ten_digit_number_test() {
  assert day_2.int_to_half_length_pair(1_234_567_890)
    == Ok(#([1, 2, 3, 4, 5], [6, 7, 8, 9, 0]))
}

pub fn eleven_digit_number_test() {
  assert day_2.int_to_half_length_pair(12_345_678_901)
    == Ok(#([1, 2, 3, 4, 5], [6, 7, 8, 9, 0, 1]))
}

pub fn bad_number_test() {
  assert day_2.int_is_doubled_string(123_123) == Ok(True)
}

pub fn good_number_test() {
  assert day_2.int_is_doubled_string(123_456) == Ok(False)
}

pub fn list_of_ranges_test() {
  assert day_2.ranges_to_list_of_ids([#(10, 20), #(30, 40)])
    == [
      10,
      11,
      12,
      13,
      14,
      15,
      16,
      17,
      18,
      19,
      20,
      30,
      31,
      32,
      33,
      34,
      35,
      36,
      37,
      38,
      39,
      40,
    ]
}

pub fn ranges_with_bad_ids_test() {
  assert day_2.ranges_to_bad_ids([
      #(11, 22),
      #(95, 115),
      #(998, 1012),
      #(1_188_511_880, 1_188_511_890),
      #(222_220, 222_224),
      #(1_698_522, 1_698_528),
      #(446_443, 446_449),
      #(38_593_856, 38_593_862),
    ])
    == [11, 22, 99, 1010, 1_188_511_885, 222_222, 446_446, 38_593_859]
}

pub fn sum_of_bad_ids_test() {
  assert day_2.sum_of_bad_ids([
      #(11, 22),
      #(95, 115),
      #(998, 1012),
      #(1_188_511_880, 1_188_511_890),
      #(222_220, 222_224),
      #(1_698_522, 1_698_528),
      #(446_443, 446_449),
      #(38_593_856, 38_593_862),
    ])
    == 1_227_775_554
}

pub fn range_parse_test() {
  assert day_2.range_string_to_int_pair("111-333") == #(111, 333)
}

pub fn ranges_parse_test() {
  let ranges =
    "11-22,95-115,998-1012,1188511880-1188511890,222220-222224,1698522-1698528,446443-446449,38593856-38593862,565653-565659,824824821-824824827,2121212118-2121212124"
  assert day_2.list_of_ranges_to_int_pairs(ranges)
    == [
      #(11, 22),
      #(95, 115),
      #(998, 1012),
      #(1_188_511_880, 1_188_511_890),
      #(222_220, 222_224),
      #(1_698_522, 1_698_528),
      #(446_443, 446_449),
      #(38_593_856, 38_593_862),
      #(565_653, 565_659),
      #(824_824_821, 824_824_827),
      #(2_121_212_118, 2_121_212_124),
    ]
}

pub fn calibrate_test() {
  assert day_2.file_to_sum_of_bad_ids("test/calibration.txt") == 1_227_775_554
}

pub fn int_to_substrings_test() {
  assert day_2.digits_to_substrings([1, 2, 3, 4]) == [[1], [1, 2], [1, 2, 3]]
}

pub fn can_repeat_into_test() {
  assert day_2.can_repeat_into([1, 2], [1, 2, 3, 4])
}

pub fn cannot_repeat_into_test() {
  assert !{ day_2.can_repeat_into([1, 2], [1, 2, 3]) }
}

pub fn repeats_into_test() {
  assert day_2.repeats_into([1, 2], [1, 2, 1, 2])
}

pub fn doesnot_repeat_into_test() {
  assert !day_2.repeats_into([1, 2], [1, 2, 3])
}

pub fn has_doubled_string_test() {
  assert day_2.has_repeated_string(1212)
}

pub fn has_trippled_string_test() {
  assert day_2.has_repeated_string(121_212)
}

pub fn no_repeated_strings_test() {
  assert !day_2.has_repeated_string(123)
}

pub fn calibrate_part2_test() {
  assert day_2.file_to_sum_of_bad_ids_part2("test/calibration.txt")
    == 4_174_379_265
}