. "$BST_LIB"
require mbuffer mbuffer/present

# mbuffer 20140310 (meta-oe recipes-support) -- a buffered stream copy with rate
# and progress reporting, built for the wasm32-hwjs glibc arm by BRINTOS-249.
#
# Everything past `present` is RED on this platform, and for a reason that is
# reached before mbuffer parses a single option: main() calls
# sysconf(_SC_AVPHYS_PAGES) and asserts the result is positive
# (mbuffer.c:1872), while sysinfo(2) is ENOSYS here and glibc's
# __get_avphys_pages ignores the failure and returns 0 (brintos/linux#26).  So
# EVERY mode aborts, including --version.  The cases below are left failing on
# purpose: each is a distinct user-visible capability that flips green on its
# own the day #26 closes.
#
# There is a SECOND, independent blocker behind it, which is why fixing #26
# alone will not produce a working mbuffer: the tool is a reader thread plus a
# writer thread around a ring buffer, and pthread_create returns 0 here for a
# thread that never runs, with pthread_join dying in glibc's futex fatal
# (brintos/linux-in-the-browser#85).  That one cannot be asserted from this
# suite -- mbuffer never gets far enough to spawn a thread -- so it is measured
# in the ticket with a standalone probe and recorded here in prose only.

t=${TMPDIR:-/tmp}/bst-mbuffer.$$
mkdir -p "$t" && cd "$t" || exit 0

# --- what does hold on this image ---------------------------------------------
check mbuffer/path test -x /usr/bin/mbuffer

# The control that makes every red below mean "sysinfo, not memory": the kernel
# accounts memory correctly and publishes it -- only the syscall glibc uses to
# read it is missing.  Without this case a reader could reasonably conclude the
# guest simply has no free memory to report.
mt=$(awk '/^MemTotal:/{print $2}' /proc/meminfo 2>/dev/null)
if [ -n "$mt" ] && [ "$mt" -gt 0 ] 2>/dev/null; then bst_ok mbuffer/meminfo-control
else bst_notok mbuffer/meminfo-control "MemTotal unreadable or 0: '$mt'"; fi

# --- the abort itself, pinned to its cause ------------------------------------
# Asserted separately from the capability cases below so that a future change of
# behaviour is attributable: if this one flips green while the rest stay red,
# the assert is gone but the tool still does not work.
mbuffer --version > v.out 2> v.err; vrc=$?
if grep -q "Assertion \`NumP > 0' failed" v.err 2>/dev/null; then
  bst_notok mbuffer/no-sysconf-abort "sysconf(_SC_AVPHYS_PAGES)=0 -> assert NumP>0 (brintos/linux#26)"
else
  bst_ok mbuffer/no-sysconf-abort
fi

# --- capabilities, each red until #26 closes -----------------------------------
# Upstream prints "mbuffer version 20140302" (the tarball is dated 20140310 but
# VERSION is 20140302) -- asserted against the string a working build emits.
check_out mbuffer/version "mbuffer version 20140302" mbuffer --version

# usage text, which upstream prints on --help with rc 0
check_out mbuffer/usage "usage: mbuffer" mbuffer --help

# the core function: a byte-exact stream copy through the buffer
printf 'hello-mbuffer' > small.in
mbuffer -q < small.in > small.out 2>/dev/null
if cmp -s small.in small.out 2>/dev/null; then bst_ok mbuffer/copy-stdin
else bst_notok mbuffer/copy-stdin "stdin->stdout copy not byte-identical (brintos/linux#26)"; fi

# a copy large enough to cycle the ring buffer rather than fit in one block
dd if=/dev/urandom of=big.in bs=1k count=64 2>/dev/null
mbuffer -q -s 4k -m 2M < big.in > big.out 2>/dev/null
if cmp -s big.in big.out 2>/dev/null; then bst_ok mbuffer/copy-64k
else bst_notok mbuffer/copy-64k "64k copy with -s 4k -m 2M not byte-identical (brintos/linux#26)"; fi

# file arguments rather than redirection
mbuffer -q -i big.in -o file.out 2>/dev/null
if cmp -s big.in file.out 2>/dev/null; then bst_ok mbuffer/file-io
else bst_notok mbuffer/file-io "-i/-o file copy not byte-identical (brintos/linux#26)"; fi

# the summary mbuffer writes to stderr when not quiet
mbuffer < small.in > /dev/null 2> sum.err
if grep -q '^summary:' sum.err 2>/dev/null; then bst_ok mbuffer/summary
else bst_notok mbuffer/summary "no summary: line on stderr (brintos/linux#26)"; fi

# error paths: exit 1 with upstream's message, both measured against a native
# x86_64 build of the same source
mbuffer --no-such-option < /dev/null > /dev/null 2> bad.err; brc=$?
if [ "$brc" = 1 ] && grep -q 'unknown option' bad.err 2>/dev/null; then bst_ok mbuffer/bad-option
else bst_notok mbuffer/bad-option "rc=$brc want 1 with 'unknown option' (brintos/linux#26)"; fi

mbuffer -q -i /no/such/file > /dev/null 2> noin.err; nrc=$?
if [ "$nrc" = 1 ] && grep -q 'could not open input file' noin.err 2>/dev/null; then bst_ok mbuffer/missing-input
else bst_notok mbuffer/missing-input "rc=$nrc want 1 with 'could not open input file' (brintos/linux#26)"; fi

# --- the platform gap, witnessed without mbuffer -------------------------------
# busybox free reads sysinfo(2); procps free reads /proc/meminfo.  Asserting the
# disagreement directly means this suite still reports the root cause even if
# mbuffer is one day removed from the image.
bt=$(busybox free 2>/dev/null | awk '/^Mem:/{print $2}')
if [ -n "$bt" ] && [ "$bt" -gt 0 ] 2>/dev/null; then bst_ok mbuffer/sysinfo-memtotal
else bst_notok mbuffer/sysinfo-memtotal "busybox free (sysinfo(2)) reports total=$bt while /proc/meminfo reports $mt kB (brintos/linux#26)"; fi

cd /; rm -rf "$t"