R Under development (unstable) (2026-03-25 r89703 ucrt) -- "Unsuffered Consequences"
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> library("testthat")
> library("bittermelon")
> 
> test_check("bittermelon")
[ FAIL 0 | WARN 0 | SKIP 53 | PASS 290 ]

══ Skipped tests (53) ══════════════════════════════════════════════════════════
• On CRAN (52): 'test-bm_bitmap.R:28:2', 'test-bm_clamp.R:49:2',
  'test-bm_distort.R:68:2', 'test-bm_expand.R:21:2', 'test-bm_extend.R:39:2',
  'test-bm_extend.R:125:2', 'test-bm_extend.R:146:2', 'test-bm_extend.R:171:2',
  'test-bm_extend.R:218:2', 'test-bm_extract.R:14:2', 'test-bm_flip.R:18:2',
  'test-bm_font.R:10:1', 'test-bm_font.R:28:1', 'test-bm_font.R:44:1',
  'test-bm_font.R:48:1', 'test-bm_gray.R:14:2', 'test-bm_invert.R:14:2',
  'test-bm_list.R:54:2', 'test-bm_list.R:114:2', 'test-bm_list.R:121:2',
  'test-bm_list.R:136:2', 'test-bm_list.R:160:2', 'test-bm_list.R:194:2',
  'test-bm_mask.R:35:2', 'test-bm_outline.R:17:2', 'test-bm_overlay.R:30:2',
  'test-bm_overlay.R:74:2', 'test-bm_pad.R:57:2', 'test-bm_pixmap.R:58:2',
  'test-bm_replace.R:17:2', 'test-bm_rotate.R:23:2', 'test-bm_rotate.R:59:2',
  'test-bm_shift.R:17:2', 'test-bm_shift.R:52:2', 'test-bm_trim.R:12:2',
  'test-bm_trim.R:39:2', 'test-bm_trim.R:60:2', 'test-bm_trim.R:86:2',
  'test-bm_trim.R:111:2', 'test-bm_trim.R:135:2', 'test-bm_trim.R:144:2',
  'test-gridpattern.R:3:2', 'test-hex.R:44:2', 'test-plot.R:1:1',
  'test-plot.R:12:1', 'test-plot.R:19:1', 'test-plot.R:37:1',
  'test-plot.R:52:1', 'test-print.bm_bitmap.R:9:2',
  'test-print.bm_pixmap.R:13:2', 'test-yaff.R:1:1', 'test-yaff.R:112:1'
• nzchar(Sys.which("monobit-convert")) is not TRUE (1): 'test-monobit.R:2:2'

[ FAIL 0 | WARN 0 | SKIP 53 | PASS 290 ]
> 
> proc.time()
   user  system elapsed 
  47.98    3.59   51.01