A collection of PDF::Reader based analysis classes for inspecting PDF output. Mainly used for testing Prawn, but will work with any PDF.

char const* const commands[] = { "aapt", " aapt", " zipalign", "abduco", " abduco", "abook", " abook", "alpine", " alpine", " pico", " pilot", " rpdump", " rpload", "angband", " angband", "apache2", " ab", " apachectl", " apxs", " checkgid", " dbmmanage", " envvars-std", " fcgistarter", " htcacheclean", " htdbm", " htdigest", " htpasswd", " httpd", " httxt2dbm", " logresolve", " rotatelogs", " suexec", "apr-dev", " apr-1-config", "apr-util-dev", " apu-1-config", "apt", " apt", " apt-cache", " apt-config", " apt-get", " apt-key", " apt-mark", "aria2", " aria2c", "atomicparsley", " AtomicParsley", "attr", " attr", " getfattr", " setfattr", "autossh", " autossh", "bash", " bash", "bc", " bc", " dc", "binutils", " addr2line", " ar", " arm-linux-androideabi-ar", " arm-linux-androideabi-ld", " arm-linux-androideabi-nm", " arm-linux-androideabi-objdump", " arm-linux-androideabi-ranlib", " arm-linux-androideabi-readelf", " arm-linux-androideabi-strip", " as", " c++filt", " elfedit", " gprof", " ld", " ldd", " nm", " objcopy", " objdump", " ranlib", " readelf", " size", " strings", " strip", "bison", " bison", " yacc", "blogc", " blogc", " blogc-make", " blogc-runserver", "bmon", " bmon", "brogue", " brogue", "bs1770gain", " bs1770gain", "bsdtar", " bsdcat", " bsdcpio", " bsdtar", "busybox", " busybox", " env", "bvi", " bmore", " bvedit", " bvi", " bview", "bzip2", " bunzip2", " bzcat", " bzcmp", " bzdiff", " bzgrep", " bzip2", " bzip2recover", " bzless", " bzmore", "cadaver", " cadaver", "calcurse", " calcurse", " calcurse-caldav", " calcurse-upgrade", "cava", " cava", "cboard", " cboard", "ccache", " ccache", "ccrypt", " ccat", " ccdecrypt", " ccencrypt", " ccguess", " ccrypt", "cgdb", " cgdb", "clang", " arm-linux-androideabi-clang", " arm-linux-androideabi-clang++", " arm-linux-androideabi-cpp", " arm-linux-androideabi-g++", " arm-linux-androideabi-gcc", " c++", " cc", " clang", " clang++", " clang-5.0", " clang-cl", " clang-cpp", " clang-format", " clang-rename", " cpp", " g++", " gcc", "cmake", " cmake", " cpack", " ctest", "cmake-curses-gui", " ccmake", "cmark", " cmark", "cmatrix", " cmatrix", "cmus", " cmus", " cmus-remote", "coreutils", " [", " b2sum", " base32", " base64", " basename", " cat", " chcon", " chgrp", " chmod", " chown", " cksum", " comm", " coreutils", " cp", " csplit", " cut", " date", " dd", " dir", " dircolors", " dirname", " du", " echo", " expand", " expr", " factor", " false", " fmt", " fold", " groups", " head", " id", " install", " join", " kill", " link", " ln", " logname", " ls", " md5sum", " mkdir", " mkfifo", " mknod", " mktemp", " mv", " nice", " nl", " nohup", " nproc", " numfmt", " od", " paste", " pathchk", " pr", " printenv", " printf", " ptx", " pwd", " readlink", " realpath", " rm", " rmdir", " runcon", " seq", " sha1sum", " sha224sum", " sha256sum", " sha384sum", " sha512sum", " shred", " shuf", " sleep", " sort", " split", " stat", " stdbuf", " stty", " sum", " sync", " tac", " tail", " tee", " test", " timeout", " touch", " tr", " true", " truncate", " tsort", " tty", " uname", " unexpand", " uniq", " unlink", " vdir", " wc", " whoami", " yes", "corkscrew", " corkscrew", "cpio", " cpio", "cppi", " cppi", "cscope", " cscope", " ocs", "ctags", " ctags", " readtags", "curl", " curl", "curseofwar", " curseofwar", "cvs", " cvs", " rcs2log", "daemonize", " daemonize", "darkhttpd", " darkhttpd", "dash", " dash", " sh", "datamash", " datamash", "db", " db_archive", " db_checkpoint", " db_convert", " db_deadlock", " db_dump", " db_hotbackup", " db_load", " db_log_verify", " db_printlog", " db_recover", " db_replicate", " db_stat", " db_tuner", " db_upgrade", " db_verify", "dcraw", " dcraw", "ddrescue", " ddrescue", " ddrescuelog", "debianutils", " add-shell", " ischroot", " remove-shell", " run-parts", " savelog", " tempfile", " which", "dialog", " dialog", " whiptail", "diffutils", " cmp", " diff", " diff3", " sdiff", "direvent", " direvent", "dirmngr", " dirmngr", " dirmngr-client", "dnsutils", " dig", " host", " nslookup", " nsupdate", "dos2unix", " dos2unix", " mac2unix", " unix2dos", " unix2mac", "dpkg", " dpkg", " dpkg-deb", " dpkg-divert", " dpkg-genbuildinfo", " dpkg-query", " dpkg-split", " dpkg-trigger", "dropbear", " dbclient", " dropbear", " dropbearconvert", " dropbearkey", " dropbearmulti", "dvtm", " dvtm", " dvtm-status", "ed", " ed", " red", "elfutils", " eu-addr2line", " eu-elfcmp", " eu-elfcompress", " eu-elflint", " eu-findtextrel", " eu-make-debug-archive", " eu-nm", " eu-objdump", " eu-ranlib", " eu-readelf", " eu-size", " eu-stack", " eu-strings", " eu-strip", " eu-unstrip", "elinks", " elinks", "emacs", " ebrowse", " emacs", " emacs-25.3", " emacsclient", " etags", "erlang", " ct_run", " dialyzer", " epmd", " erl", " erlc", " escript", " run_erl", " to_erl", "espeak", " espeak", "expect", " autoexpect", " expect", " timed-read", " timed-run", " unbuffer", "fdupes", " fdupes", "ffmpeg", " ffmpeg", " ffprobe", "fftw-dev", " fftw-wisdom", " fftw-wisdom-to-conf", " fftwf-wisdom", " fftwl-wisdom", "figlet", " chkfont", " figlet", " figlist", " showfigfonts", "file", " file", "finch", " finch", "findutils", " find", " xargs", "fish", " column", " fish", " fish_indent", " fish_key_reader", "flac", " flac", " metaflac", "flex", " flex", " flex++", "fontconfig-utils", " fc-cache", " fc-cat", " fc-list", " fc-match", " fc-pattern", " fc-query", " fc-scan", " fc-validate", "fortune", " fortune", "fossil", " fossil", "freetype-dev", " freetype-config", "frobtads", " frob", " t3make", " tadsc", "frotz", " frotz", " zgames", "fsmon", " fsmon", "fwknop", " fwknop", "fzf", " fzf", " fzf-tmux", "gawk", " awk", " gawk", "gbt", " gbt", "gcal", " gcal", " gcal2txt", " tcal", " txt2gcal", "gdb", " gcore", " gdb", " gdbserver", "gdbm", " gdbm_dump", " gdbm_load", " gdbmtool", "gdk-pixbuf", " gdk-pixbuf-csource", " gdk-pixbuf-pixdata", " gdk-pixbuf-query-loaders", "gegl", " gcut", " gegl", " gegl-imgcmp", "getconf", " getconf", "gettext", " autopoint", " envsubst", " gettext", " gettext.sh", " gettextize", " msgattrib", " msgcat", " msgcmp", " msgcomm", " msgconv", " msgen", " msgexec", " msgfilter", " msgfmt", " msggrep", " msginit", " msgmerge", " msgunfmt", " msguniq", " ngettext", " recode-sr-latin", " xgettext", "ghostscript", " dvipdf", " eps2eps", " gs", " gsbj", " gsdj", " gsdj500", " gslj", " gslp", " gsnd", " lprsetup.sh", " pdf2dsc", " pdf2ps", " pf2afm", " pfbtopfa", " pphs", " printafm", " ps2ascii", " ps2epsi", " ps2pdf", " ps2pdf12", " ps2pdf13", " ps2pdf14", " ps2pdfwr", " ps2ps", " ps2ps2", " unix-lpr.sh", "gifsicle", " gifdiff", " gifsicle", "git", " git", " git-receive-pack", " git-upload-archive", " git-upload-pack", "glib-bin", " gapplication", " gdbus", " gio", " gio-querymodules", " glib-compile-resources", " glib-compile-schemas", " glib-genmarshal", " glib-mkenums", " gobject-query", " gresource", " gsettings", " gtester", "global", " global", " globash", " gozilla", " gtags", " gtags-cscope", " htags", " htags-server", "glulxe", " glulxe", "gmic", " gmic", "gnuchess", " gnuchess", "gnugo", " gnugo", "gnuit", " .gitaction", " gitaction", " gitdpkgname", " gitfm", " gitkeys", " gitmkdirs", " gitmount", " gitps", " gitregrep", " gitrfgrep", " gitrgrep", " gitunpack", " gitview", " gitwhich", " gitwipe", " gitxgrep", "gnupg", " gpg", " gpg-zip", " gpgsplit", "gnupg2", " addgnupghome", " applygnupgdefaults", " gpg-agent", " gpg-connect-agent", " gpg2", " gpgconf", " gpgparsemail", " gpgscm", " gpgsm", " gpgtar", " gpgv2", " kbxutil", " watchgnupg", "gnuplot", " gnuplot", "gnushogi", " gnushogi", "gnutls", " certtool", " gnutls-cli", " gnutls-cli-debug", " gnutls-serv", " ocsptool", " psktool", " srptool", "golang", " go", " gofmt", "gperf", " gperf", "gpgme", " gpgme-tool", "gpgme-dev", " gpgme-config", "gpgv", " gpgv", "gpsbabel", " gpsbabel", "graphicsmagick", " gm", "graphviz", " acyclic", " bcomps", " ccomps", " circo", " cluster", " diffimg", " dijkstra", " dot", " dot2gxl", " dot_builtins", " edgepaint", " fdp", " gc", " gml2gv", " graphml2gv", " gv2gml", " gv2gxl", " gvcolor", " gvgen", " gvmap", " gvmap.sh", " gvpack", " gvpr", " gxl2dot", " gxl2gv", " mm2gv", " neato", " nop", " osage", " patchwork", " prune", " sccmap", " sfdp", " tred", " twopi", " unflatten", "greed", " greed", "grep", " egrep", " fgrep", " grep", "gst-plugins-base", " gst-device-monitor-1.0", " gst-discoverer-1.0", " gst-play-1.0", "gstreamer", " gst-inspect-1.0", " gst-launch-1.0", " gst-stats-1.0", " gst-typefind-1.0", "gtypist", " gtypist", "gzip", " gunzip", " gzexe", " gzip", " uncompress", " zcat", " zcmp", " zdiff", " zegrep", " zfgrep", " zforce", " zgrep", " zless", " zmore", " znew", "harfbuzz-utils", " hb-ot-shape-closure", " hb-shape", " hb-view", "hashdeep", " hashdeep", " md5deep", " sha1deep", " sha256deep", " tigerdeep", " whirlpooldeep", "hexcurse", " hexcurse", "heyu", " heyu", "hfsutils", " hattrib", " hcd", " hcopy", " hdel", " hdir", " hformat", " hfsutil", " hls", " hmkdir", " hmount", " hpwd", " hrename", " hrmdir", " humount", " hvol", "htop", " htop", "httping", " httping", "hub", " hub", "hunspell", " affixcompress", " analyze", " chmorph", " hunspell", " hunzip", " hzip", " ispellaff2myspell", " makealias", " munch", " unmunch", " wordforms", " wordlist2hunspell", "hydra", " dpl4hydra.sh", " hydra", " hydra-wizard.sh", " pw-inspector", "icecast", " icecast", "iconv", " iconv", "icu-devtools", " derb", " escapesrc", " genbrk", " genccode", " gencfu", " gencmn", " gencnval", " gendict", " gennorm2", " genrb", " gensprep", " icu-config", " icuinfo", " icupkg", " makeconv", " pkgdata", " uconv", "imagemagick", " animate", " compare", " composite", " conjure", " convert", " display", " identify", " import", " magick", " magick-script", " mogrify", " montage", " stream", "imgflo", " imgflo", " imgflo-graphinfo", " imgflo-runtime", "inetutils", " dnsdomainname", " ftp", " logger", " telnet", " tftp", " whois", "inotify-tools", " inotifywait", " inotifywatch", "iperf3", " iperf3", "ired", " bdiff", " ired", " vired", "irssi", " irssi", "jhead", " jhead", "joe", " jmacs", " joe", " jpico", " jstar", " rjoe", "jq", " jq", "jupp", " jmacs", " joe", " jpico", " jstar", " jupp", " rjoe", "kona", " k", "krb5", " compile_et", " gss-client", " gss-server", " k5srvutil", " kadmin", " kadmin.local", " kadmind", " kdb5_util", " kdestroy", " kinit", " klist", " kpasswd", " kprop", " kpropd", " kproplog", " krb5-config", " krb5-send-pr", " krb5kdc", " ksu", " kswitch", " ktutil", " kvno", " sclient", " sim_client", " sim_server", " sserver", " uuclient", " uuserver", "ldc", " dub", " ldc-build-runtime", " ldc2", " ldmd2", " rdmd", "ldns-dev", " ldns-config", "ledger", " ledger", "leptonica", " convertfilestopdf", " convertfilestops", " convertformat", " convertsegfilestopdf", " convertsegfilestops", " converttopdf", " converttops", " fileinfo", " xtractprotos", "less", " less", " lessecho", " lesskey", "lftp", " lftp", " lftpget", "libassuan-dev", " libassuan-config", "libcaca", " caca-config", " cacaclock", " cacademo", " cacafire", " cacaplay", " cacaserver", " cacaview", " img2txt", "libcairo", " cairo-trace", "libcroco", " croco-0.6-config", " csslint-0.6", "libcurl-dev", " curl-config", "libgcrypt", " dumpsexp", " hmac256", " libgcrypt-config", " mpicalc", "libgd", " annotate", " bdftogd", " gd2copypal", " gd2togif", " gd2topng", " gdcmpgif", " gdlib-config", " gdparttopng", " gdtopng", " giftogd2", " pngtogd", " pngtogd2", " webpng", "libgpg-error", " gpg-error", " gpg-error-config", "libgrpc", " check_epollexclusive", " gen_hpack_tables", " gen_legal_metadata_characters", " gen_percent_encoding_tables", " grpc_cpp_plugin", " grpc_create_jwt", " grpc_csharp_plugin", " grpc_node_plugin", " grpc_objective_c_plugin", " grpc_php_plugin", " grpc_print_google_default_creds_token", " grpc_python_plugin", " grpc_ruby_plugin", " grpc_verify_jwt", "libjasper-utils", " imgcmp", " imginfo", " jasper", "libjpeg-turbo-progs", " cjpeg", " djpeg", " jpegtran", " rdjpgcom", " tjbench", " wrjpgcom", "libksba-dev", " ksba-config", "libnpth", " npth-config", "liboggz", " oggz", " oggz-chop", " oggz-codecs", " oggz-comment", " oggz-diff", " oggz-dump", " oggz-info", " oggz-known-codecs", " oggz-merge", " oggz-rip", " oggz-scan", " oggz-sort", " oggz-validate", "libotr", " otr_mackey", " otr_modify", " otr_parse", " otr_readforge", " otr_remac", " otr_sesskeys", "libpng-dev", " libpng-config", " libpng16-config", "librsvg", " rsvg-convert", "libtiff-utils", " fax2ps", " fax2tiff", " pal2rgb", " ppm2tiff", " raw2tiff", " tiff2bw", " tiff2pdf", " tiff2ps", " tiff2rgba", " tiffcmp", " tiffcp", " tiffcrop", " tiffdither", " tiffdump", " tiffinfo", " tiffmedian", " tiffset", " tiffsplit", "libtool", " libtool", " libtoolize", "libxapian-dev", " xapian-config", "libxml2-dev", " xml2-config", "libxml2-utils", " xmlcatalog", " xmllint", "libxslt-dev", " xslt-config", "libzmq", " curve_keygen", "lighttpd", " lighttpd", "littlecms-utils", " jpgicc", " linkicc", " psicc", " tificc", " transicc", "lld", " ld.lld", " lld", " lld-link", "llvm", " llc", " lli", " llvm-ar", " llvm-as", " llvm-bcanalyzer", " llvm-c-test", " llvm-cat", " llvm-config", " llvm-cov", " llvm-cvtres", " llvm-cxxdump", " llvm-cxxfilt", " llvm-diff", " llvm-dis", " llvm-dlltool", " llvm-dsymutil", " llvm-dwarfdump", " llvm-dwp", " llvm-extract", " llvm-lib", " llvm-link", " llvm-lto", " llvm-lto2", " llvm-mc", " llvm-mcmarkup", " llvm-modextract", " llvm-mt", " llvm-nm", " llvm-objdump", " llvm-opt-report", " llvm-pdbutil", " llvm-profdata", " llvm-ranlib", " llvm-readelf", " llvm-readobj", " llvm-rtdyld", " llvm-size", " llvm-split", " llvm-stress", " llvm-strings", " llvm-symbolizer", " llvm-xray", " obj2yaml", " opt", " verify-uselistorder", " yaml2obj", "ltrace", " ltrace", "lua", " lua", " luac", "lynx", " lynx", "lzip", " lzip", "lzop", " lzop", "m4", " m4", "macchanger", " macchanger", "make", " make", "man", " apropos", " demandoc", " makewhatis", " man", " mandoc", " soelim", " whatis", "mariadb", " aria_chk", " aria_dump_log", " aria_ftdump", " aria_pack", " aria_read_log", " innochecksum", " mariadb_config", " msql2mysql", " my_print_defaults", " myisam_ftdump", " myisamchk", " myisamlog", " myisampack", " mysql", " mysql_client_test", " mysql_config", " mysql_convert_table_format", " mysql_find_rows", " mysql_fix_extensions", " mysql_install_db", " mysql_plugin", " mysql_secure_installation", " mysql_setpermission", " mysql_tzinfo_to_sql", " mysql_upgrade", " mysql_waitpid", " mysqlaccess", " mysqladmin", " mysqlbinlog", " mysqlcheck", " mysqld", " mysqld_multi", " mysqld_safe", " mysqld_safe_helper", " mysqldump", " mysqldumpslow", " mysqlhotcopy", " mysqlimport", " mysqlshow", " mysqlslap", " mytop", " perror", " replace", " resolve_stack_dump", " resolveip", "mathomatic", " mathomatic", "mc", " mc", " mcdiff", " mcedit", " mcview", "megatools", " megacopy", " megadf", " megadl", " megaget", " megals", " megamkdir", " megaput", " megareg", " megarm", "memcached", " memcached", "micro", " micro", "minicom", " ascii-xfr", " minicom", " runscript", " xminicom", "mlocate", " locate", " updatedb", "moon-buggy", " moon-buggy", "moria", " moria", "mosh", " mosh", " mosh-client", " mosh-server", " mosh.pl", "mosquitto", " mosquitto", " mosquitto_passwd", " mosquitto_pub", " mosquitto_sub", "mp3splt", " mp3splt", "mpc", " mpc", "mpd", " mpd", "mpv", " mpv", "mtools", " amuFormat.sh", " lz", " mattrib", " mbadblocks", " mcat", " mcd", " mcheck", " mclasserase", " mcomp", " mcopy", " mdel", " mdeltree", " mdir", " mdu", " mformat", " minfo", " mkmanifest", " mlabel", " mmd", " mmount", " mmove", " mpartition", " mrd", " mren", " mshortname", " mshowfat", " mtools", " mtoolstest", " mtype", " mxtar", " mzip", " tgz", " uz", "multitail", " multitail", "mutt", " mutt", " pgpewrap", " pgpring", " smime_keys", "nano", " nano", "ncdc", " ncdc", "ncdu", " ncdu", "ncmpcpp", " ncmpcpp", "ncurses-dev", " ncursesw6-config", "ncurses-utils", " clear", " infocmp", " reset", " tabs", " tic", " toe", " tput", " tset", "ne", " ne", "neovim", " nvim", "net-tools", " arp", " ifconfig", " ipmaddr", " iptunnel", " mii-tool", " nameif", " netstat", " plipconfig", " rarp", " route", " slattach", "netcat", " nc", " ncat", " netcat", "netpbm", " 411toppm", " anytopnm", " asciitopgm", " atktopbm", " avstopam", " bioradtopgm", " bmptopnm", " bmptoppm", " brushtopbm", " cameratopam", " cistopbm", " cmuwmtopbm", " ddbugtopbm", " escp2topbm", " eyuvtoppm", " fiascotopnm", " fitstopnm", " fstopgm", " g3topbm", " gemtopbm", " gemtopnm", " giftopnm", " gouldtoppm", " hdifftopam", " hipstopgm", " hpcdtoppm", " icontopbm", " ilbmtoppm", " imgtoppm", " infotopam", " jbigtopnm", " jpeg2ktopam", " jpegtopnm", " leaftoppm", " lispmtopgm", " macptopbm", " manweb", " mdatopbm", " mgrtopbm", " mrftopbm", " mtvtoppm", " neotoppm", " netpbm-config", " palmtopnm", " pamaddnoise", " pamarith", " pambackground", " pambayer", " pamchannel", " pamcomp", " pamcrater", " pamcut", " pamdeinterlace", " pamdepth", " pamdice", " pamditherbw", " pamedge", " pamendian", " pamenlarge", " pamexec", " pamfile", " pamfix", " pamfixtrunc", " pamflip", " pamfunc", " pamgauss", " pamgradient", " pamlookup", " pammasksharpen", " pammixinterlace", " pammosaicknit", " pamoil", " pampaintspill", " pamperspective", " pampick", " pampop9", " pamrecolor", " pamrgbatopng", " pamrubber", " pamscale", " pamseq", " pamshadedrelief", " pamsharpmap", " pamsharpness", " pamsistoaglyph", " pamslice", " pamsplit", " pamstack", " pamstereogram", " pamstretch", " pamstretch-gen", " pamsumm", " pamsummcol", " pamtable", " pamthreshold", " pamtilt", " pamtoavs", " pamtodjvurle", " pamtofits", " pamtogif", " pamtohdiff", " pamtohtmltbl", " pamtojpeg2k", " pamtompfont", " pamtooctaveimg", " pamtopam", " pamtopdbimg", " pamtopfm", " pamtopng", " pamtopnm", " pamtosrf", " pamtosvg", " pamtotga", " pamtotiff", " pamtouil", " pamtowinicon", " pamtoxvmini", " pamundice", " pamunlookup", " pamvalidate", " pamwipeout", " pbmclean", " pbmlife", " pbmmake", " pbmmask", " pbmminkowski", " pbmpage", " pbmpscale", " pbmreduce", " pbmtext", " pbmtextps", " pbmto10x", " pbmto4425", " pbmtoascii", " pbmtoatk", " pbmtobbnbg", " pbmtocis", " pbmtocmuwm", " pbmtodjvurle", " pbmtoepsi", " pbmtoepson", " pbmtoescp2", " pbmtog3", " pbmtogem", " pbmtogo", " pbmtoibm23xx", " pbmtoicon", " pbmtolj", " pbmtoln03", " pbmtolps", " pbmtomacp", " pbmtomatrixorbital", " pbmtomda", " pbmtomgr", " pbmtomrf", " pbmtonokia", " pbmtopgm", " pbmtopi3", " pbmtopk", " pbmtoplot", " pbmtoppa", " pbmtopsg3", " pbmtoptx", " pbmtosunicon", " pbmtowbmp", " pbmtox10bm", " pbmtoxbm", " pbmtoybm", " pbmtozinc", " pbmupc", " pc1toppm", " pcdovtoppm", " pcxtoppm", " pdbimgtopam", " pfmtopam", " pgmabel", " pgmbentley", " pgmcrater", " pgmdeshadow", " pgmedge", " pgmenhance", " pgmhist", " pgmkernel", " pgmmake", " pgmmedian", " pgmminkowski", " pgmmorphconv", " pgmnoise", " pgmnorm", " pgmoil", " pgmramp", " pgmslice", " pgmtexture", " pgmtofs", " pgmtolispm", " pgmtopbm", " pgmtopgm", " pgmtoppm", " pgmtosbig", " pgmtost4", " pi1toppm", " pi3topbm", " picttoppm", " pjtoppm", " pktopbm", " pngtopam", " pngtopnm", " pnmalias", " pnmarith", " pnmcat", " pnmcolormap", " pnmcomp", " pnmconvol", " pnmcrop", " pnmcut", " pnmdepth", " pnmenlarge", " pnmfile", " pnmflip", " pnmgamma", " pnmhisteq", " pnmhistmap", " pnmindex", " pnminterp", " pnminvert", " pnmmargin", " pnmmercator", " pnmmontage", " pnmnlfilt", " pnmnoraw", " pnmnorm", " pnmpad", " pnmpaste", " pnmpsnr", " pnmquant", " pnmquantall", " pnmremap", " pnmrotate", " pnmscale", " pnmscalefixed", " pnmshear", " pnmsmooth", " pnmsplit", " pnmstitch", " pnmtile", " pnmtoddif", " pnmtofiasco", " pnmtofits", " pnmtojbig", " pnmtojpeg", " pnmtopalm", " pnmtopclxl", " pnmtoplainpnm", " pnmtopng", " pnmtopnm", " pnmtops", " pnmtorast", " pnmtorle", " pnmtosgi", " pnmtosir", " pnmtotiff", " pnmtotiffcmyk", " pnmtoxwd", " ppm3d", " ppmbrighten", " ppmchange", " ppmcie", " ppmcolormask", " ppmcolors", " ppmdcfont", " ppmddumpfont", " ppmdim", " ppmdist", " ppmdither", " ppmdmkfont", " ppmdraw", " ppmfade", " ppmflash", " ppmforge", " ppmglobe", " ppmhist", " ppmlabel", " ppmmake", " ppmmix", " ppmnorm", " ppmntsc", " ppmpat", " ppmquant", " ppmquantall", " ppmrainbow", " ppmrelief", " ppmrough", " ppmshadow", " ppmshift", " ppmspread", " ppmtoacad", " ppmtoapplevol", " ppmtoarbtxt", " ppmtoascii", " ppmtobmp", " ppmtoeyuv", " ppmtogif", " ppmtoicr", " ppmtoilbm", " ppmtojpeg", " ppmtoleaf", " ppmtolj", " ppmtomap", " ppmtomitsu", " ppmtompeg", " ppmtoneo", " ppmtopcx", " ppmtopgm", " ppmtopi1", " ppmtopict", " ppmtopj", " ppmtopjxl", " ppmtoppm", " ppmtopuzz", " ppmtorgb3", " ppmtosixel", " ppmtospu", " ppmtoterm", " ppmtotga", " ppmtouil", " ppmtowinicon", " ppmtoxpm", " ppmtoyuv", " ppmtoyuvsplit", " ppmtv", " ppmwheel", " psidtopgm", " pstopnm", " qrttoppm", " rasttopnm", " rawtopgm", " rawtoppm", " rgb3toppm", " rlatopam", " rletopnm", " sbigtopgm", " sgitopnm", " sirtopnm", " sldtoppm", " spctoppm", " spottopgm", " sputoppm", " srftopam", " st4topgm", " sunicontopnm", " svgtopam", " tgatoppm", " thinkjettopbm", " tifftopnm", " wbmptopbm", " winicontopam", " winicontoppm", " xbmtopbm", " ximtoppm", " xpmtoppm", " xvminitoppm", " xwdtopnm", " ybmtopbm", " yuvsplittoppm", " yuvtoppm", " yuy2topam", " zeisstopnm", "nettle", " nettle-hash", " nettle-lfib-stream", " nettle-pbkdf2", " pkcs1-conv", " sexp-conv", "newsboat", " newsboat", " podboat", "nginx", " nginx", "ninja", " ninja", "nmap", " nmap", " nping", "nodejs", " node", " npm", " npx", "nodejs-current", " node", " npm", " npx", "notmuch", " notmuch", "nyancat", " nyancat", "nzbget", " nzbget", "oathtool", " oathtool", " pskctool", "ocrad", " ocrad", "openjpeg-tools", " opj_compress", " opj_decompress", " opj_dump", "openssh", " scp", " sftp", " source-ssh-agent", " ssh", " ssh-add", " ssh-agent", " ssh-copy-id", " ssh-keygen", " ssh-keyscan", " ssha", " sshd", "openssl-tool", " openssl", "optipng", " optipng", "opus-tools", " opusdec", " opusenc", " opusinfo", "p7zip", " 7z", " 7za", " 7zr", "pango", " pango-view", "par2", " par2", " par2create", " par2repair", " par2verify", "patch", " patch", "patchelf", " patchelf", "pcre-dev", " pcre-config", "pcre2-dev", " pcre2-config", "perl", " corelist", " cpan", " enc2xs", " encguess", " h2ph", " h2xs", " instmodsh", " json_pp", " libnetcfg", " perl", " perlbug", " perldoc", " perlivp", " perlthanks", " piconv", " pl2pm", " pod2html", " pod2man", " pod2text", " pod2usage", " podchecker", " podselect", " prove", " ptar", " ptardiff", " ptargrep", " shasum", " splain", " xsubpp", " zipdetails", "pforth", " pforth", "php", " phar", " phar.phar", " php", " php-cgi", " php-config", " phpdbg", " phpize", "php-fpm", " php-fpm", "pick", " pick", "picolisp", " picolisp", " pil", "pinentry", " pinentry", " pinentry-curses", "pkg-config", " pkg-config", "play-audio", " play-audio", "pngquant", " pngquant", "poppler", " pdfdetach", " pdffonts", " pdfimages", " pdfinfo", " pdfseparate", " pdftocairo", " pdftohtml", " pdftoppm", " pdftops", " pdftotext", " pdfunite", "postgresql", " clusterdb", " createdb", " createuser", " dropdb", " dropuser", " initdb", " pg_archivecleanup", " pg_basebackup", " pg_config", " pg_controldata", " pg_ctl", " pg_dump", " pg_dumpall", " pg_isready", " pg_receivewal", " pg_recvlogical", " pg_resetwal", " pg_restore", " pg_rewind", " pg_test_fsync", " pg_test_timing", " pg_upgrade", " pg_waldump", " pgbench", " postgres", " postmaster", " psql", " reindexdb", " vacuumdb", "potrace", " mkbitmap", " potrace", "privoxy", " privoxy", "procps", " free", " pgrep", " pidof", " pkill", " pmap", " ps", " pwdx", " slabtop", " sysctl", " tload", " top", " uptime", " vmstat", " w", " watch", "profanity", " profanity", "proot", " proot", " termux-chroot", "protobuf", " protoc", "psmisc", " fuser", " killall", " peekfd", " prtstat", " pstree", "pulseaudio", " esdcompat", " pacat", " pacmd", " pactl", " pasuspender", " pulseaudio", "pure-ftpd", " pure-authd", " pure-ftpd", " pure-ftpwho", " pure-mrtginfo", " pure-pw", " pure-pwconvert", " pure-quotacheck", " pure-statsdecode", " pure-uploadscript", "pv", " pv", "pwgen", " pwgen", "python", " 2to3", " 2to3-3.6", " pydoc3", " pydoc3.6", " python", " python3", " python3-config", " python3.6", " python3.6-config", " python3.6m-config", " pyvenv", " pyvenv-3.6", "python2", " idle", " pydoc", " python-config", " python2", " python2-config", " python2.7", " python2.7-config", " smtpd.py", "qalc", " qalc", "qpdf", " fix-qdf", " qpdf", " zlib-flate", "radare2", " r2", " r2agent", " r2pm", " rabin2", " radare2", " radiff2", " rafind2", " ragg2", " ragg2-cc", " rahash2", " rarun2", " rasm2", " rax2", "ragel", " ragel", "rcs", " ci", " co", " ident", " merge", " rcs", " rcsclean", " rcsdiff", " rcsmerge", " rlog", "rdiff", " rdiff", "redir", " redir", "redis", " redis-benchmark", " redis-check-aof", " redis-check-rdb", " redis-cli", " redis-sentinel", " redis-server", "remind", " rem", " rem2ps", " remind", "rgbds", " rgbasm", " rgbfix", " rgbgfx", " rgblink", "rlwrap", " rlwrap", "rsync", " rsync", "rtmpdump", " rtmpdump", " rtmpgw", " rtmpsrv", " rtmpsuck", "ruby", " erb", " gem", " irb", " rake", " rdoc", " ruby", "screen", " screen", " screen-4.6.2", "scrypt", " scrypt", "sed", " sed", "sensible-utils", " select-editor", " sensible-browser", " sensible-editor", " sensible-pager", "sharutils", " shar", " unshar", " uudecode", " uuencode", "silversearcher-ag", " ag", "sl", " sl", "socat", " filan", " procan", " socat", "sox", " play", " rec", " sox", " soxi", "sqlite", " sqlite3", "squid", " purge", " squid", " squidclient", "sshpass", " sshpass", "sslscan", " sslscan", "stag", " stag", "strace", " strace", " strace-log-merge", "stunnel", " stunnel", "subversion", " svn", " svnadmin", " svnbench", " svndumpfilter", " svnfsfs", " svnlook", " svnmucc", " svnrdump", " svnserve", " svnsync", " svnversion", "syncthing", " syncthing", "tar", " tar", "tasksh", " tasksh", "taskwarrior", " task", "tcl", " sqlite3_analyzer", " tclsh", " tclsh8.6", "tcsh", " tcsh", "teckit", " sfconv", " teckit_compile", " txtconv", "termux-api", " termux-audio-info", " termux-battery-status", " termux-camera-info", " termux-camera-photo", " termux-clipboard-get", " termux-clipboard-set", " termux-contact-list", " termux-dialog", " termux-download", " termux-infrared-frequencies", " termux-infrared-transmit", " termux-location", " termux-media-scan", " termux-notification", " termux-notification-remove", " termux-share", " termux-sms-inbox", " termux-sms-send", " termux-storage-get", " termux-telephony-call", " termux-telephony-cellinfo", " termux-telephony-deviceinfo", " termux-toast", " termux-tts-engines", " termux-tts-speak", " termux-vibrate", " termux-wifi-connectioninfo", " termux-wifi-scaninfo", "termux-elf-cleaner", " termux-elf-cleaner", "teseq", " reseq", " teseq", "tesseract", " tesseract", "texinfo", " info", " install-info", " makeinfo", " pdftexi2dvi", " pod2texi", " texi2any", " texi2dvi", " texi2pdf", " texindex", "texlive-bin", " a2ping", " a5toa4", " adhocfilelist", " afm2afm", " afm2pl", " afm2tfm", " aleph", " allcm", " allec", " allneeded", " arara", " arlatex", " authorindex", " autoinst", " autosp", " bbl2bib", " bbox", " bg5+latex", " bg5+pdflatex", " bg5conv", " bg5latex", " bg5pdflatex", " bibdoiadd", " bibexport", " bibmradd", " bibtex", " bibtex8", " bibzbladd", " bundledoc", " cachepic", " cef5conv", " cef5latex", " cef5pdflatex", " cefconv", " ceflatex", " cefpdflatex", " cefsconv", " cefslatex", " cefspdflatex", " cfftot1", " checkcites", " checklistings", " chktex", " chkweb", " cjk-gs-integrate", " context", " contextjit", " convbkmk", " ctangle", " ctanify", " ctanupload", " ctie", " cweave", " de-macro", " depythontex", " detex", " devnag", " deweb", " diadia", " disdvi", " dosepsbin", " dt2dv", " dtxgen", " dv2dt", " dvi2fax", " dvi2tty", " dviasm", " dvicopy", " dvidvi", " dvigif", " dvihp", " dvilj", " dvilj2p", " dvilj4", " dvilj4l", " dvilj6", " dvipdfm", " dvipdfmx", " dvipdft", " dvipng", " dvipos", " dvips", " dvired", " dvitomp", " dvitype", " e2pall", " ebb", " ebong", " epspdf", " epspdftk", " epstopdf", " eptex", " euptex", " exceltex", " extconv", " extractbb", " fig4latex", " findhyph", " fmtutil", " fmtutil-sys", " fmtutil-user", " fontinst", " fragmaster", " gbklatex", " gbkpdflatex", " getmapdl", " gftodvi", " gftopk", " gftype", " gsftopk", " hbf2gf", " ht", " htcontext", " htlatex", " htmex", " httex", " httexi", " htxelatex", " htxetex", " inimf", " initex", " installfont-tl", " jamo-normalize", " kanji-config-updmap", " kanji-config-updmap-sys", " kanji-config-updmap-user", " kanji-fontmap-creator", " komkindex", " kpseaccess", " kpsepath", " kpsereadlink", " kpsestat", " kpsetool", " kpsewhere", " kpsewhich", " kpsexpand", " lacheck", " latex-git-log", " latex-papersize", " latex2man", " latex2nemeth", " latexdiff", " latexdiff-vc", " latexfileversion", " latexindent", " latexmk", " latexpand", " latexrevise", " lily-glyph-commands", " lily-image-commands", " lily-rebuild-pdfs", " listbib", " listings-ext.sh", " ltx2crossrefxml", " ltxfileinfo", " ltximg", " lua2dox_filter", " luaotfload-tool", " luatex", " luatools", " lwarpmk", " m-tx", " make4ht", " makedtx", " makeglossaries", " makeglossaries-lite", " makeindex", " match_parens", " mathspic", " mf", " mf-nowin", " mf2pt1", " mfplain", " mft", " mk4ht", " mkgrkindex", " mkindex", " mkjobtexmf", " mkocp", " mkofm", " mkpic", " mkt1font", " mktexfmt", " mktexlsr", " mktexmf", " mktexpk", " mktextfm", " mmafm", " mmpfb", " mpost", " mptopdf", " mtxrun", " mtxrunjit", " multibibliography", " musixflx", " musixtex", " odvicopy", " odvitype", " ofm2opl", " omfonts", " opl2ofm", " ot2kpx", " otangle", " otfinfo", " otftotfm", " otp2ocp", " outocp", " ovf2ovp", " ovp2ovf", " patgen", " pbibtex", " pdf180", " pdf270", " pdf90", " pdfannotextractor", " pdfatfi", " pdfbook", " pdfbook2", " pdfcrop", " pdfflip", " pdfjam", " pdfjam-pocketmod", " pdfjam-slides3up", " pdfjam-slides6up", " pdfjoin", " pdflatexpicscale", " pdfnup", " pdfpun", " pdftex", " pdftosrc", " pdfxup", " pdvitomp", " pdvitype", " pedigree", " perltex", " pfarrei", " pkfix", " pkfix-helper", " pktogf", " pktype", " pltotf", " pmpost", " pmxchords", " pn2pdf", " pooltype", " ppltotf", " prepmx", " ps2eps", " ps2frag", " ps4pdf", " pslatex", " pst2pdf", " ptex", " ptex2pdf", " ptftopl", " purifyeps", " pygmentex", " pythontex", " repstopdf", " rpdfcrop", " rubibtex", " rubikrotation", " rumakeindex", " rungs", " simpdftex", " sjisconv", " sjislatex", " sjispdflatex", " splitindex", " srcredact", " sty2dtx", " svn-multi", " synctex", " t1dotlessj", " t1lint", " t1rawafm", " t1reencode", " t1testpage", " t4ht", " tangle", " tex", " tex4ebook", " tex4ht", " texconfig", " texconfig-dialog", " texconfig-sys", " texcount", " texdef", " texdiff", " texdirflatten", " texdoc", " texdoctk", " texexec", " texfot", " texhash", " texlinks", " texliveonfly", " texloganalyser", " texlua", " texluac", " texmfstart", " texosquery", " texosquery-jre5", " texosquery-jre8", " tftopl", " thumbpdf", " tie", " tlmgr", " tlmgr.ln", " tpic2pdftex", " ttf2afm", " ttf2kotexfont", " ttf2pk", " ttf2tfm", " ttftotype42", " typeoutfileinfo", " ulqda", " upbibtex", " updmap", " updmap-sys", " updmap-user", " updvitomp", " updvitype", " upmendex", " upmpost", " uppltotf", " uptex", " uptftopl", " urlbst", " vftovp", " vlna", " vpe", " vpl2ovp", " vpl2vpl", " vptovf", " weave", " wofm2opl", " wopl2ofm", " wovf2ovp", " wovp2ovf", " xdvipdfmx", " xetex", " xhlatex", " yplan", "tig", " tig", "timewarrior", " timew", "tintin++", " tt++", "tinyscheme", " tinyscheme", "tmate", " tmate", "tmux", " tmux", "toilet", " toilet", "tor", " tor", " tor-gencert", " tor-resolve", " torify", "torsocks", " torsocks", "tracepath", " tracepath", " traceroute", "transmission", " transmission-create", " transmission-daemon", " transmission-edit", " transmission-remote", " transmission-show", "tree", " tree", "tsocks", " tsocks", "tty-clock", " tty-clock", "tty-solitaire", " ttysolitaire", "ttyrec", " ttyplay", " ttyrec", " ttytime", "units", " units", " units_cur", "unrar", " unrar", "unzip", " funzip", " unzip", " unzipsfx", " zipgrep", " zipinfo", "utfdecode", " utfdecode", "util-linux", " addpart", " blkdiscard", " blkid", " blkzone", " blockdev", " cal", " chcpu", " chrt", " col", " colcrt", " colrm", " ctrlaltdel", " delpart", " dmesg", " fallocate", " fdformat", " fincore", " findfs", " flock", " fsck.cramfs", " fsck.minix", " fsfreeze", " getopt", " hexdump", " hwclock", " ionice", " isosize", " ldattach", " linux32", " linux64", " look", " losetup", " lscpu", " lsipc", " lsns", " mcookie", " mesg", " mkfs", " mkfs.bfs", " mkfs.cramfs", " mkfs.minix", " mkswap", " more", " namei", " nologin", " nsenter", " partx", " prlimit", " raw", " readprofile", " rename", " renice", " resizepart", " rev", " rtcwake", " script", " scriptreplay", " setarch", " setsid", " setterm", " swaplabel", " taskset", " ul", " uname26", " unshare", " wdctl", " whereis", " wipefs", " zramctl", "valac", " vala", " vala-0.38", " vala-gen-introspect", " vala-gen-introspect-0.38", " valac", " valac-0.38", " vapicheck", " vapicheck-0.38", " vapigen", " vapigen-0.38", "valadoc", " valadoc", " valadoc-0.38", "valgrind", " callgrind_annotate", " callgrind_control", " cg_annotate", " cg_diff", " cg_merge", " ms_print", " valgrind", " valgrind-di-server", " valgrind-listener", " vgdb", "vifm", " vifm", " vifm-convert-dircolors", " vifm-pause", " vifm-screen-split", "vim", " vi", " view", " vim", " vimdiff", " vimtutor", " xxd", "vim-python", " vi", " view", " vim", " vimdiff", " vimtutor", " xxd", "vorbis-tools", " oggdec", " oggenc", " ogginfo", " vcut", " vorbiscomment", "vttest", " vttest", "vtutils", " vtquery", " vtshowkeys", " vtsize", " vttitle", "w3m", " w3m", " w3mman", "wcalc", " wcalc", "weechat", " weechat", "wget", " wget", "wol", " wol", " wol-bootptab", " wol-dhcpdconf", "x264", " x264", "x265", " x265", "xapian-tools", " copydatabase", " quest", " simpleexpand", " simpleindex", " simplesearch", " xapian-check", " xapian-compact", " xapian-delve", " xapian-metadata", " xapian-progsrv", " xapian-replicate", " xapian-replicate-server", " xapian-tcpsrv", "xmlsec", " xmlsec1", " xmlsec1-config", "xmlstarlet", " xml", "xorriso", " osirrox", " xorrecord", " xorriso", " xorriso-tcltk", " xorrisofs", "xsltproc", " xsltproc", "xz-utils", " lzcat", " lzcmp", " lzdiff", " lzegrep", " lzfgrep", " lzgrep", " lzless", " lzma", " lzmadec", " lzmainfo", " lzmore", " unlzma", " unxz", " xz", " xzcat", " xzcmp", " xzdec", " xzdiff", " xzegrep", " xzfgrep", " xzgrep", " xzless", " xzmore", "yasm", " vsyasm", " yasm", " ytasm", "zbar", " zbarimg", "zile", " zile", "zip", " zip", " zipcloak", " zipnote", " zipsplit", "zsh", " zsh", "zstd", " unzstd", " zstd", " zstdcat", " zstdgrep", " zstdless", " zstdmt", "ack-grep", " ack", "apksigner", " apksigner", "asciinema", " asciinema", "autoconf", " autoconf", " autoheader", " autom4te", " autoreconf", " autoscan", " autoupdate", " ifnames", "automake", " aclocal", " aclocal-1.15", " automake", " automake-1.15", "byobu", " byobu", " byobu-config", " byobu-ctrl-a", " byobu-disable", " byobu-disable-prompt", " byobu-enable", " byobu-enable-prompt", " byobu-export", " byobu-janitor", " byobu-keybindings", " byobu-launch", " byobu-launcher", " byobu-launcher-install", " byobu-launcher-uninstall", " byobu-layout", " byobu-prompt", " byobu-quiet", " byobu-reconnect-sockets", " byobu-screen", " byobu-select-backend", " byobu-select-profile", " byobu-select-session", " byobu-shell", " byobu-silent", " byobu-status", " byobu-status-detail", " byobu-tmux", " byobu-ugraph", " byobu-ulevel", " col1", " ctail", " manifest", " purge-old-kernels", " vigpg", " wifi-status", "colordiff", " colordiff", "cowsay", " cowsay", "debootstrap", " debootstrap", "dx", " dx", "ecj", " ecj", "getmail", " getmail", " getmail_fetch", " getmail_maildir", " getmail_mbox", "luarocks", " luarocks", " luarocks-5.3", " luarocks-admin", " luarocks-admin-5.3", "neofetch", " neofetch", "parallel", " env_parallel", " env_parallel.ash", " env_parallel.bash", " env_parallel.csh", " env_parallel.dash", " env_parallel.fish", " env_parallel.ksh", " env_parallel.pdksh", " env_parallel.sh", " env_parallel.tcsh", " env_parallel.zsh", " niceload", " parallel", " parcat", " sem", " sql", "pass", " pass", "pastebinit", " pastebinit", "pathpicker", " fpp", "ranger", " ranger", " rifle", "ruby-ri", " ri", "screenfetch", " screenfetch", "stow", " chkstow", " stow", "termux-am", " am", "termux-apt-repo", " termux-apt-repo", "termux-create-package", " termux-create-package", "termux-tools", " chsh", " dalvikvm", " df", " getprop", " ip", " logcat", " login", " ping", " ping6", " pkg", " pm", " settings", " su", " termux-fix-shebang", " termux-info", " termux-open", " termux-open-url", " termux-reload-settings", " termux-setup-storage", " termux-wake-lock", " termux-wake-unlock", " xdg-open", "tsu", " tsu", "vcsh", " vcsh", "yarn", " yarn", }; Desktop version Sign out

Fast Rust library for PDF inspection, classification, and text extraction. Intelligently detects scanned vs text-based PDFs to enable smart routing decisions.

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Automation Testing | Web+API | Playwright | Typescript | VS Code | Parallel Cross Browser Testing | Playwright Inspector |Visual Testing | API Testing | Videos | Customized Screenshots & PDFs | Trace | Retries | Annotations | Tagging | Device Emulation | Reporters - HTML, JUnit, Line, Dot, List | SSL | Execution - Parallel, Serial, Default | Parameterization using multiple Data sets

Native macOS PDF preflight inspector — 55 checks, 14 fixes, 10 profiles. Free forever.

YouTube Video Inspector is a multi-agent tool that analyzes YouTube videos by fetching metadata, analyzing comments, and generating performance reports, which can be exported as PDFs using CrewAI.

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A PDF security analysis framework that surfaces all embedded PDF Actions, supports AI-assisted risk assessment, and integrates with security workflows as an MCP server module.

<!-- markdownlint-disable no-inline-html --> <!-- markdownlint-disable ol-prefix --> # GRAVITON (aka the TEAL Blackbox Toolkit): Program Reporting and Testing via Dry Runs <img width="345" alt="http://cds.cern.ch/record/2315186/files/scoap3-fulltext.pdf" src="https://user-images.githubusercontent.com/291133/160721859-21a3560a-0a82-4249-aa54-5ede4c60f8d2.png"> **NOTE: to get math formulas to render here using Chrome, add the [xhub extension](https://chrome.google.com/webstore/detail/xhub/anidddebgkllnnnnjfkmjcaallemhjee/related) and reload** **DISCLAIMER**: Graviton is subject to change and makes no backwards compatability guarantees. ## Blackbox Testing Howto ### What is TEAL Blackbox Testing? TEAL Blackbox Testing lets you gain confidence that your Algorand smart contracts are correct by writing assertions and and analyzing results via dry runs. ### Why Blackbox Testing? Here are some use cases: * by allowing you to assert that certain invariants hold over a large set of inputs you gain greater confidence that your TEAL programs and AVM smart contracts work as designed * when tweaking, refactoring or optimizing your TEAL source, ensure that no regressions have occured * allows AVM developers to practice the art of TTDD (TEAL Test Driven Development) ## Simple TEAL Blackbox Toolkit Example: Program for $`x^2`$ Consider this [TEAL program](./tests/teal/lsig_square.teal) for computing $`x^2`$: ```plain #pragma version 6 arg 0 btoi callsub square_0 return // square square_0: store 0 load 0 pushint 2 // 2 exp retsub ``` We'd like to write some unit tests to validate its correctness and make **assertions** about the: * program's opcode cost * program's stack * stack's height * scratch variables * final log message (this is especially useful for [ABI-compliant programs](https://developer.algorand.org/docs/get-details/dapps/smart-contracts/ABI/)) * status (**PASS** or **REJECT**) * error conditions that are and aren't encountered Even better, before making fine-grained assertions we'd like to get a sense of what the program is doing on a large set of inputs and discover _experimentally_ these **program invariants**. Let's go through how we can do this: * start by making basic assertions and validate them using dry runs (see "**Basic Assertions**" section below) * execute the program on a sequence of inputs and explore the results (see "**EDRA: Exploratory Dry Run Analysis**" section below) * create invariants for the entire sequence and assert that the invariants hold (see "**Advanced: Asserting Invariants on a Dry Run Sequence**" section below) > Becoming a TEAL Blackbox Toolkit Ninja involves 10 steps as described below ### Dry Run Environment Setup **STEP 1**. Start with a running local node and make note of Algod's port number (for our [standard sandbox](https://github.com/algorand/sandbox) this is `4001`) **STEP 2**. Set the `ALGOD_PORT` value in [tests/clients.py](./tests/clients.py#L7) to this port number. (The port is already pre-set to `4001` because [graviton](https://github.com/algorand/graviton)'s [CI process](https://en.wikipedia.org/wiki/Continuous_integration) uses the standad sandbox) ### TEAL Program for Testing: Logic Sig v. App **STEP 3**. Next, you'll need to figure out if your TEAL program should be a Logic Signature or an Application. Each of these program _modes_ has its merits, but we won't get into the pros/cons here. From a Blackbox Test's perspective, the main difference is how external arguments are handled. Logic sigs rely on the [arg opcode](https://developer.algorand.org/docs/get-details/dapps/avm/teal/opcodes/#arg-n) while apps rely on [txna ApplicationArgs i](https://developer.algorand.org/docs/get-details/dapps/avm/teal/opcodes/#txna-f-i). In our $`x^2`$ **logic sig** example, you can see on [line 2](./tests/teal/lsig_square.teal#L2) that the `arg` opcode is used. Because each argument opcode (`arg` versus `ApplicationArgs`) is mode-exclusive, any program that takes input will execute succesfully in _one mode only_. **STEP 4**. Write the TEAL program that you want to test. You can inline the test as described here or follow the approach of `./tests/integration/blackbox_test.py` and save under `./tests/teal`. So following the inline appraoch we begin our TEAL Blackbox script with an <a name="teal">inline teal source variable</a>: ```python teal = """#pragma version 6 arg 0 btoi callsub square_0 return // square square_0: store 0 load 0 pushint 2 // 2 exp retsub""" ``` ### The TEAL Blackbox Toolkit's Utitlity Classes The TEAL Blackbox Toolkit comes with the following main classes: * `DryRunExecutor` - executes dry run's for apps and logic sigs for one or more inputs * `DryRunInspector` - encapsulates a dry run's result for a single input and allows inspecting and making assertions about it * `Invariant` - class for asserting invariants about a _sequence_ of dry run executions in a declarative fashion ### Basic Assertions When executing a dry run using `DryRunExecutor` you'll get back `DryRunInspector` objects. Such objects have **assertable properties** which can be used to validate the dry run. **STEP 4**. Back to our $`x^2`$ example, and assuming the `teal` variable is defined [as above](#teal). You can run the following: ```python from graviton.blackbox import DryRunExecutor from tests.clients import get_algod algod = get_algod() x = 9 args = (x,) inspector = DryRunExecutor.dryrun_logicsig(algod, teal, args) assert inspector.status() == "PASS" assert inspector.stack_top() == x**2 ``` Here we have executed a dry run on input $`x=9`$, then asserted that: * the program status was `PASS` * the program exited with the top of its stack containing $`x^2 = 9^2 = 81`$ Some available _assertable properties_ are: * `stack_top()` * `last_log()` * `cost()` * `status()` * `final_scratch()` * `error()` * `max_stack_height()` See the [DryRunInspector class comment](./graviton/blackbox.py#L387) for more assertable properties and details. ### Printing out the TEAL Stack Trace for a Failing Assertion **STEP 5**. The `DryRunInspector`'s `report()` method lets you print out a handy report in the case of a failing assertion. Let's intentionally break the test case above by claiming that $`x^2 = x^3`$ for $`x=2`$ and print out this _report_ when our silly assertion fails. ```python from graviton.blackbox import DryRunExecutor from tests.clients import get_algod algod = get_algod() x = 2 args = (x,) inspector = DryRunExecutor.dryrun_logicsig(algod, teal, args) # This one's ok expected, actual = "PASS", inspector.status() assert expected == actual, inspector.report( args, f"expected {expected} but got {actual}" ) # This one's absurd! x^3 != x^2 expected, actual = x**3, inspector.stack_top() assert expected == actual, inspector.report( args, f"expected {expected} but got {actual}" ) ``` If we run the test (e.g. with `pytest`) we'll see a printout such as: ```sh AssertionError: =============== <<<<<<<<<<<expected 8 but got 4>>>>>>>>>>> =============== App Trace: step | PC# | L# | Teal | Scratch | Stack --------+-------+------+-------------------+-----------+---------------------- 1 | 1 | 1 | #pragma version 6 | | [] 2 | 2 | 2 | arg_0 | | [0x0000000000000002] 3 | 3 | 3 | btoi | | [2] 4 | 7 | 6 | label1: | | [2] 5 | 9 | 7 | store 0 | 0->2 | [] 6 | 11 | 8 | load 0 | | [2] 7 | 13 | 9 | pushint 2 | | [2, 2] 8 | 14 | 10 | exp | | [4] 9 | 6 | 4 | callsub label1 | | [4] 10 | 15 | 11 | retsub | | [4] =============== MODE: ExecutionMode.Signature TOTAL COST: None =============== FINAL MESSAGE: PASS =============== Messages: ['PASS'] Logs: [] =============== -----BlackBoxResult(steps_executed=10)----- TOTAL STEPS: 10 FINAL STACK: [4] FINAL STACK TOP: 4 MAX STACK HEIGHT: 2 FINAL SCRATCH: {0: 2} SLOTS USED: [0] FINAL AS ROW: {'steps': 10, ' top_of_stack': 4, 'max_stack_height': 2, 's@000': 2} =============== Global Delta: [] =============== Local Delta: [] =============== TXN AS ROW: {' Run': 0, ' cost': None, ' last_log': '`None', ' final_message': 'PASS', ' Status': 'PASS', 'steps': 10, ' top_of_stack': 4, 'max_stack_height': 2, 's@000': 2, 'Arg_00': 2} =============== <<<<<<<<<<<expected 8 but got 4>>>>>>>>>>> =============== assert 8 == 4 ``` In particular, we can: * Track the program execution by viewing its **App Trace** * 2 was assigned to **scratch slot #0** at step 5 * the stack ended up with **4** on top * the run **PASS**'ed * Read the message parameter that was provided and which explains in English what went wrong: `expected 8 but got 4` ### EDRA: Exploratory Dry Run Analysis Let's expand our investigation from a single dry-run to multiple runs or a **run sequence**. We'll observe how _assertable properties_ depend on inputs and conjecture some program invariants. To aid in the investigation we'll generate a report in CSV format (Comma Separated Values) where: * columns represent _assertable properties_ of dry-runs, and * rows represents dry-run executions for specific inputs **STEP 6**. Back to our $`x^2`$ example, here's how to generate a report with 1 row for each of the inputs `0, 1, ... , 15`: ```python from graviton.blackbox import DryRunExecutor, DryRunInspector from tests.clients import get_algod algod = get_algod() inputs = [(x,) for x in range(16)] run_results = DryRunExecutor.dryrun_logicsig_on_sequence(algod, teal, inputs) csv = DryRunInspector.csv_report(inputs, run_results) print(csv) ``` Note that each element in the `inputs` array `(x,)` is itself a tuple as `args` given to a dry run execution need to be of type `Sequence` (remember, that these will be passed to a TEAL program which may take one, several, or no inputs at all). At this point, you'll be able to look at your [dry run sequence results](./graviton/blackbox.py#L752) and conduct some analysis. For the $`x^2`$ example, after loading the CSV in Google sheets and reformating a bit it will look like: <img width="465" alt="image" src="https://user-images.githubusercontent.com/291133/158812699-318169e2-487c-4dac-b97b-a9db8148b638.png"> Pointing out some interesting results: * column `D` **Arg 00** has the input $`x`$ (it's the argument at index 0) * column `A` contains the **Run** number * column `E` **top of stack** is the value at program's termination, i.e. $`x^2`$ * column `B` **Status** of each runs **PASS**es _except for **Run 1** with **Arg 00** = 0_. (The first run **REJECT**s because $`0^2 = 0`$ and TEAL programs reject when the top of the stack is 0) * column `G` shows scratch slot **s@000** which stores the value of $`x`$ (except for the case $`x = 0`$ in which appears empty; in fact, slots always default to the zero value and an **<a name="0val-artifact">artifact</a>** of dry-runs is that they do not report when 0-values get stored into previously empty slots as no state change actually occurs) * column `F` **max stack height** is always 2. The final observation makes sense because there is no branching or looping in the program. **STEP 7**. We can re-cast the observed effects in `Columns E, B, G, F` as **invariants** written in Python as follows: * `inspector.stack_top() == x ** 2` * `inspector.max_stack_height() == 2` * `inspector.status() == ("REJECT" if x == 0 else "PASS")` * `inspector.final_scratch() == ({} if x == 0 else {0: x})` ### Advanced: Asserting Invariants on a Dry Run Sequence The final and most advanced topic we'll cover is how to assert that invariants hold on a sequence of inputs. Lets take the information we gleaned in our EDRA CSV report, and create an integration test out of it. There are two ways to achieve this goal: * Procedural invariant assertions * Declarative invariant assertions #### Procedural Blackbox Dry Run Sequence Assertions **STEP 8**. The procedural approach takes the _invariants_ and simply asserts them inside of a for loop that iterates over the inputs and dry runs. One can call each dry run execution independently, or use `DryRunExecutor`'s convenience methods `dryrun_app_on_sequence()` and `dryrun_logicsig_on_sequence()`. For example, let's assert that the above invariants hold for all $`x \leq 100`$: ```python from graviton.blackbox import DryRunExecutor from tests.clients import get_algod algod = get_algod() inputs = [(x,) for x in range(101)] dryrun_results = DryRunExecutor.dryrun_logicsig_on_sequence(algod, teal, inputs) for i, inspector in enumerate(dryrun_results): args = inputs[i] x = args[0] assert inspector.stack_top() == x**2 assert inspector.max_stack_height() == 2 assert inspector.status() == ("REJECT" if x == 0 else "PASS") assert inspector.final_scratch() == ({} if x == 0 else {0: x}) ``` #### Declarative Blackbox Dry Run Sequence Assertions **STEP 9**. The TEAL Blackbox Toolkit also allows for declarative style test writing. Let's define some invariants for a particular sequence of `lsig_square` TEAL program dry runs: ```python scenario = { "inputs": [(i,) for i in range(100)], "invariants": { DRProp.stackTop: lambda args: args[0] ** 2, DRProp.maxStackHeight: 2, DRProp.status: lambda i: "REJECT" if i[0] = 0 else "PASS", DRProp.finalScratch: lambda args: ({} if args[0] else {0: args[0]}), }, } ``` In the parlance of the TEAL Blackbox Toolkit, a set of such declarative assertions is called a **test scenario**. Scenarios are dict's containing two keys `inputs` and `invariants` and follow [certain conventions](./graviton/invariant.py#L101). In particular: * **inputs** gives a list of tuples, each tuple representing the `args` to be fed into a single dry run execution * **invariants** gives a dict that maps [DryRunProperty](./graviton/blackbox.py#L25)'s to an invariant _predicate_ In English, letting $`x`$ be the input variable for our square function, the above **test scenario**: * provides a list of 100 tuples of the form $`(x)`$ that will serve as args. * IE: $`(0), (1), (2), ... , (99)`$ * establishes 4 different _invariants_ as follows: * the **stack's top** will contain $`x^2`$ * the **max stack height** during execution is always 2 * the executions' **status** is **PASS** except for the case $`x=0`$ * the **final scratch** will have $`x`$ stored at slot `0` except for that strange $`x=0`$ case (recall the [0-val scratch slot artifact](#0val-artifact)) Declarative invariants make use of the following: * `DryRunProperty` (aka `DRProp`): an enum that acts as a key in a scenario's assertions dict * class `Invariant` * its constructor takes in a predicate (there are [4 kinds of predicates](#predicate)) and returns a callable that is used for runtime assertions * method `inputs_and_assertions()` validates a scenario and extracts out its assertions * method `dryrun_assert()` evaluates the dry-run sequence using the constructed `SequenceAssertion` To employ the declarative test scenario above write the following: ```python from graviton.blackbox import ( DryRunExecutor, DryRunProperty as DRProp, ExecutionMode, ) from graviton.invariant import Invariant from tests.clients import get_algod algod = get_algod() scenario = { "inputs": [(i,) for i in range(100)], "invariants": { DRProp.stackTop: lambda args: args[0] ** 2, DRProp.maxStackHeight: 2, DRProp.status: lambda args: "REJECT" if args[0] == 0 else "PASS", DRProp.finalScratch: lambda args: ({0: args[0]} if args[0] else {}), }, } # Validate the scenario and dig out inputs/invariants: inputs, invariants = Invariant.inputs_and_invariants( scenario, ExecutionMode.Signature ) # Execute the dry runs and obtain a sequence of DryRunInspectors: inspectors = DryRunExecutor.dryrun_logicsig_on_sequence(algod, teal, inputs) # Invariant assertions on sequence: for dr_property, invariant in invariants.items(): invariant.validates(dr_property, inputs, inspectors) ``` **STEP 10**. _**Deep Dive into Invariants via Exercises**_ Four kinds of <a name="predicate">predicates</a> are used to define _invariants_: 1. _simple python types_ - these are useful in the case of _constant_ invariants. In the above `maxStackHeight` is asserted to _**ALWAYS**_ equal 2 by using `2` in the declaration: `DRProp.maxStackHeight: 2` 2. _1-variable functions_ -these are useful when you have a python "simulator" for the invariant. In the above `stackTop` is asserted to be $`x^2`$ by using a lambda expression for $`x^2`$ in the declaration: `DRProp.stackTop: lambda args: args[0] ** 2` 3. _dictionaries_ of type `Dict[Tuple, Any]` - these are useful when you want to assert a discrete set of input-output pairs. For example, if you have 4 inputs that you want to assert are being squared, you could use ```python DRProp.stackTop: { (2,): 4, (7,): 49, (13,): 169, (11,): 121, } ``` >Note that this case illustrates why each `args` container should be a tuple intead of a list. In order to specify a map from args to expected, we need to make `args` a key in a dictionary. Python dictionary keys must be hashable and lists are _not hashable_ while tuples _are_ hashable, hence the tuple-requirement. 4. _2-variable functions_ -these are useful when your assertion is more subtle than out-and-out equality. For example, suppose you want to assert that the `cost` of each run is _between_ $`2n \pm 5`$ where $`n`$ is the first arg of the input. Then you could declare: `DRProp.cost: lambda args, actual: 2*args[0] - 5 <= actual <= 2*args[0] + 5` #### **EXERCISE A** Convert each of the lambda expressions used above to dictionaries that assert the same thing. #### **EXERCISE B** Use 2-variable functions in order to _ignore_ the weird $`x=0`$ cases above. #### _PARTIAL SOLUTIONS to EXERCISES_ **Exercise A Partial Solution**. For `DRProp.status`'s declaration you could define the `dict` using dictionary comprehension syntax as follows: ```python DRProp.status: {(x,): "PASS" if x else "REJECT" for x in range(100)}, ``` **Exercise B Partial Solution**. For `DRProp.status`'s declaration you could ignore the case $`x=0`$ as follows: ```python DRProp.status: lambda args, actual: "PASS" == actual if args[0] else True, ``` ## Slow and Bad Fibonacci - Another Example Report [This](https://docs.google.com/spreadsheets/d/1ax-jQdYCkKT61Z6SPeGm5BqAMybgkWJa-Dv0yVjgFSA/edit?usp=sharing) is an example of `app_slow_fibonacci.teal`'s Dryrun stats: <img width="1231" alt="image" src="https://user-images.githubusercontent.com/291133/158705149-302d755f-afcc-4380-976a-ca14800c138f.png"> A few items to take note of: * $`n`$ is given by **Arg_00** * the app was **REJECT**ed for $`n = 0`$ because `fibonacci(0) == 0` is left at the top of the stack * the app was **REJECT**ed for $`n > 7`$ because of exceeding budget * the app **errored** only for $`n > 16`$ because of exceeding _dynamic_ budget * the **cost** is growing exponentially (poor algorithm design) * the **top of stack** contains `fibonacci(n)` except in the error case * the **final_log** contains `hex(fibonacci(n))` except in the error and reject cases * **max stack height** is $`2n`$ except for $`n=0`$ and the error case * you can see the final values of scratch slots **s@000** and **s@001** which are respectively $`n`$ and `fibonacci(n)` Here's an example of how [invariants can be asserted](https://github.com/algorand/graviton/blob/a8c7eab729a36503948849674ea55995d5fc4ec1/tests/integration/blackbox_test.py#L315) on this function.

help to inspect PDF files (require Ruby 1.9 and Ruby/GTK2)

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InstaAuction, an application developed in iOS is essentially a guide to the ACV Vehicle Condition Inspector(VCI) helping him/her to get a gist of the 360° imagery of the car. The application uses latest technologies like Depth Sensing, Machine Learning, Image Detection, Stabilization to achieve normalized distance walkaround. It involves the Vehicle Inspector moving around the car capturing the best possible frames by following the instructions provided by the application. The application is smart enough to sense the car, detect the side of the car, how fast the user is moving around the car and how far he/she is away from the car. It combines all the technologies and generates a 360° imagery low frame rate video. The above can be seen in action at the following link https://www.youtube.com/watch?v=qdvD4307a94 All the technical documentation/research/findings can be found in the pdf named - Techincal Documentation.pdf

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