. "$BST_LIB"
require jq jq/present

tmp=${TMPDIR:-/tmp}/bst-jq.$$
printf '{"a":1,"b":[10,20],"s":"Hello"}\n' > "$tmp.json"

# real jq (the meta-oe package), not a stub. jq's compiled-in version string is
# empty in this build ("jq-" with no number; jq --help shows "[version ]") -- a jq
# packaging quirk, not a wasm32-hwjs fault, and jq is otherwise fully functional.
# Identity is asserted on the help banner, which names the tool, rather than the
# (empty) version string.
check_out jq/identity   "commandline JSON processor"  sh -c "jq --help 2>&1"

# the ticket's headline check: echo '{"a":1}' | jq .a -> 1 (stdin/pipe form)
check_out jq/field-pipe "1"   sh -c "echo '{\"a\":1}' | jq '.a'"

# object field + array index read from a file, -r raw output
check_out jq/field      "1"   jq -r ".a"    "$tmp.json"
check_out jq/index      "20"  jq -r ".b[1]" "$tmp.json"

# a slurp/aggregate program -- exercises the VM beyond a single path lookup
check_out jq/aggregate  "30"  sh -c "echo '[10,20]' | jq 'add'"

# oniguruma regex builtins are gated: jq is built --without-oniguruma because
# onig's disable_noname_group_capture VLA-escape is REFUSED by the wasm32-hwjs
# coroutinize pass. test/1 therefore is unavailable. Recorded skip; flips to ok
# on its own the day onig can be re-enabled (a tripwire for that toolchain fix).
if echo '"Hello"' | jq -e 'test("^H")' >/dev/null 2>&1; then
  bst_ok   jq/regex-onig
else
  bst_skip jq/regex-onig "jq built --without-oniguruma (onig VLA-escape REFUSED by wasm32-hwjs coroutinize pass)"
fi

# a jq program compile error exits 3 (jq's documented status for an invalid program)
check_rc  jq/badprog    3   sh -c "echo '{}' | jq '.['"

rm -f "$tmp.json"