# Thumbnails sized for the tile's WIDTH at 2x density, not 512 on the longest
# side. The operator on sindra-nude-final, 2026-09-23: "the images look blurry
# until they're selected and blown up". Every row is a change
# tests/test_thumbs.py or tests/test_thumbs_browser.py claims to forbid.

unit = "thumbnails sized for the tile"

[[mutation]]
label = "the old rule: bound the longest side at 512 (portraits get 256px of width)"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_a_portrait_keeps_its_full_width"
old = '''
            im.thumbnail((THUMB_WIDTH, THUMB_HEIGHT_MAX))'''
new = '''
            im.thumbnail((512, 512))'''

[[mutation]]
label = "the width bound is below what the desktop tile needs at 2x"
file = "booth/thumbs.py"
test = "tests/test_thumbs_browser.py::test_a_thumbnail_covers_its_tile_at_2x_density"
old = '''
THUMB_WIDTH = 768'''
new = '''
THUMB_WIDTH = 640'''

[[mutation]]
label = "no height bound: a long screenshot goes through at full height"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_an_extremely_tall_image_is_bounded_by_height_too"
old = '''
            im.thumbnail((THUMB_WIDTH, THUMB_HEIGHT_MAX))'''
new = '''
            im.thumbnail((THUMB_WIDTH, 10 ** 6))'''

[[mutation]]
label = "fitting in pixels is taken as light in bytes (the megabyte portrait is served whole)"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_a_tile_width_image_that_is_heavy_still_gets_a_thumbnail"
old = '''
            if fits and (s_stat.st_size <= THUMB_LIGHT_BYTES or getattr(im, "is_animated", False)):'''
new = '''
            if fits:'''

[[mutation]]
label = "an already small, light image gets a cache entry that saves nothing"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_an_already_small_image_gets_no_thumbnail"
old = '''
            if fits and (s_stat.st_size <= THUMB_LIGHT_BYTES or getattr(im, "is_animated", False)):'''
new = '''
            if fits and getattr(im, "is_animated", False):'''

[[mutation]]
label = "a heavy animated GIF that fits is flattened to one frame"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_an_animated_gif_that_fits_is_served_as_itself"
old = '''
            if fits and (s_stat.st_size <= THUMB_LIGHT_BYTES or getattr(im, "is_animated", False)):'''
new = '''
            if fits and s_stat.st_size <= THUMB_LIGHT_BYTES:'''

[[mutation]]
label = "an unversioned cache name: a thumbnail cut to the old rule is served forever"
file = "booth/thumbs.py"
test = "tests/test_thumbs.py::test_a_thumbnail_cut_to_the_old_rule_is_not_served"
old = '''
    return booth / THUMB_DIR / f"{rel}.{THUMB_WIDTH}w.webp"'''
new = '''
    return booth / THUMB_DIR / (rel + ".webp")'''