# Per-item blur storage: `.blurred` round-trips any rel, whoever writes it.
# The fix for the wrong-item write the heid bug-hunt found through r2b merge 1
# (a stripped rel blurred its neighbour), operator-ruled 2026-09-23. Every row
# is a change tests/test_blur.py claims to forbid.
#
# NOT here, on purpose: the S_ISREG guard in read_blurred. With O_NONBLOCK a
# FIFO opens and reads as EOF, a symlink is already refused by O_NOFOLLOW, and a
# device node needs root to plant, so no test here can see that guard go. It
# stays as the `.seen` shape, and it is not claimed as a proven falsifier.

unit = "blur storage round-trip"

[[mutation]]
label = "the writer strips the rel (the old line format's loss)"
file = "booth/blur.py"
test = "tests/test_blur.py::test_a_leading_space_rel_round_trips"
old = '''
        current.add(rel)'''
new = '''
        current.add(rel.strip())'''

[[mutation]]
label = "the route strips `f` before writing (the reported wrong-item write)"
file = "booth/app.py"
test = "tests/test_blur.py::test_the_blur_route_blurs_exactly_the_item_it_names"
old = '''
        rel = f.lstrip("/")'''
new = '''
        rel = f.strip().lstrip("/")'''

[[mutation]]
label = "a JSON-only reader: every live line-format file un-blurs on deploy"
file = "booth/blur.py"
test = "tests/test_blur.py::test_the_legacy_line_format_still_reads"
old = '''
    return {ln.strip() for ln in text.splitlines() if ln.strip()}'''
new = '''
    return set()'''

[[mutation]]
label = "a legacy file that is not JSON reads as nothing instead of falling back"
file = "booth/blur.py"
test = "tests/test_blur.py::test_a_legacy_rel_that_starts_with_a_bracket_still_reads"
old = '''
        data = None'''
new = '''
        return set()'''

[[mutation]]
label = "a FIFO blocks the read (no O_NONBLOCK)"
file = "booth/blur.py"
test = "tests/test_blur.py::test_a_fifo_blur_file_does_not_block_the_read"
old = '''
        fd = os.open(booth / BLUR_FILE, os.O_RDONLY | os.O_NOFOLLOW | os.O_NONBLOCK)'''
new = '''
        fd = os.open(booth / BLUR_FILE, os.O_RDONLY | os.O_NOFOLLOW)'''

[[mutation]]
label = "the read follows a planted symlink (no O_NOFOLLOW)"
file = "booth/blur.py"
test = "tests/test_blur.py::test_a_symlinked_blur_file_is_not_followed_on_read"
old = '''
        fd = os.open(booth / BLUR_FILE, os.O_RDONLY | os.O_NOFOLLOW | os.O_NONBLOCK)'''
new = '''
        fd = os.open(booth / BLUR_FILE, os.O_RDONLY | os.O_NONBLOCK)'''

[[mutation]]
label = "the write goes through a planted symlink instead of replacing it"
file = "booth/blur.py"
test = "tests/test_blur.py::test_a_write_replaces_a_planted_symlink_rather_than_writing_through_it"
old = '''
        os.replace(tmp, path)'''
new = '''
        path.write_bytes(Path(tmp).read_bytes()); os.unlink(tmp)'''

[[mutation]]
label = "the stored order is not the stated one (invariant 6)"
file = "booth/blur.py"
test = "tests/test_blur.py::test_the_file_is_a_json_array_in_sorted_order"
old = '''
    body = json.dumps(sorted(current), ensure_ascii=False)'''
new = '''
    body = json.dumps(sorted(current, reverse=True), ensure_ascii=False)'''

[[mutation]]
label = "the CLI ignores the verb: `unblur` blurs"
file = "scripts/booth"
test = "tests/test_blur.py::test_the_cli_writes_the_format_the_service_reads"
old = '''
on = sys.argv[1] == "blur"'''
new = '''
on = True'''

[[mutation]]
label = "the CLI writes past a refused '..' path"
file = "scripts/booth"
test = "tests/test_blur.py::test_the_cli_still_refuses_a_dotdot_path"
old = '''
        *..*) echo "refusing path with '..': $item" >&2; exit 2 ;;'''
new = '''
        *..*) echo "refusing path with '..': $item" >&2 ;;'''

[[mutation]]
label = "the item's own blur is the composed one (booth fog leaks into it)"
file = "booth/items.py"
test = "tests/test_blur.py::test_the_item_record_carries_its_own_blur_apart_from_the_booths"
old = '''
                blurred_self=rel in blurred,'''
new = '''
                blurred_self=rel in blurred or booth_blur,'''

[[mutation]]
label = "app.py reads the blur file a second time (invariant 3)"
file = "booth/app.py"
test = "tests/test_blur.py::test_app_py_never_reads_the_blur_file_itself"
old = '''
    out = []
    for it in booth_items(child):'''
new = '''
    out = []
    read_blurred(child)
    for it in booth_items(child):'''