test.scss

@use './apca';
@use 'sass:list';

// https://github.com/Myndex/SAPC-APCA/tree/master/documentation
// 
// Test Values for APCA W3 using the G series constants, normal and reverse float values for each color pair.
// First number is TEXT second number is BACKGROUND.
// 
//     TEXT vs BKGND •  EXPECTED RESULT for APCA W3 to 0.1.9 (G-constants)
// 
//     #888 vs #fff  •  63.056469930209424
//     #fff vs #888  • -68.54146436644962  
// 
//     #000 vs #aaa  •  58.146262578561334
//     #aaa vs #000  • -56.24113336839742
//     
//     #123 vs #def  •  91.66830811481631
//     #def vs #123  • -93.06770049484275
// 
//     #123 vs #444  •   8.32326136957393
//     #444 vs #123  •  -7.526878460278154
// 
// The below are only for certain experimental low-scale versions, these tests do *not* acpa-w3:
// 
//     #123 vs #234  •   1.7512243099356113
//     #234 vs #123  •  -1.6349191031377903

$contrast-tests: (
  (#888, #fff, 63.056469930209424),
  (#fff, #888, -68.54146436644962),
  (#000, #aaa, 58.146262578561334),
  (#aaa, #000, -56.24113336839742),
  (#123, #def, 91.66830811481631),
  (#def, #123, -93.06770049484275),
  (#123, #444, 8.32326136957393),
  (#444, #123, -7.526878460278154),
  (#123, #234, 0),
  (#234, #123, 0)
);

@each $txt, $bg, $contrast in $contrast-tests {
  $res: apca.contrast($txt, $bg);
  @if ($res != $contrast) {
    @error "apca.contrast(#{$txt}, #{$bg}) should be #{$contrast} but received #{$res}";
  }
}

$recommendation-tests: (
  (#fff, black),
  (#000, white),
  (#fc0, black),
  (#2c911c, white)
);

@each $bg, $txt in $recommendation-tests {
  $c: apca.recommend-text-color($bg);
  @if ($c != $txt) {
    @error "apca.recommend-text-color(#{$bg}) should be #{$txt} but received #{$c}";
  }
}