#!/usr/bin/env bash
# shellcheck disable=SC2034 # Used by test runner for reporting.
TEST_DESC="Windows/Git Bash: registry builds survive large icon payloads (E2BIG mitigation)."
set -euo pipefail
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
# shellcheck source=../common/env.sh
# shellcheck disable=SC1091
. "${SCRIPT_DIR}/../common/env.sh"
# shellcheck source=../common/assert.sh
# shellcheck disable=SC1091
. "${SCRIPT_DIR}/../common/assert.sh"
case "$(uname -s 2>/dev/null || printf '')" in
MINGW* | MSYS* | CYGWIN*) : ;;
*)
# This test targets MSYS/Git Bash argv limits.
exit 0
;;
esac
test_create_tmpdir
WORKSPACE="${TEST_TMPDIR}/registry-large-icons"
test_stage_workspace "${WORKSPACE}"
# Remove register.sh to force auto-discovery.
rm -f "${WORKSPACE}/server.d/register.sh"
mkdir -p "${WORKSPACE}/tools/large-icon"
# Create a large local icon payload to exceed Windows argv limits.
icon_path="${WORKSPACE}/tools/large-icon/icon.svg"
printf '<svg xmlns="http://www.w3.org/2000/svg">' >"${icon_path}"
if command -v head >/dev/null 2>&1; then
head -c 262144 /dev/zero | tr '\0' 'A' >>"${icon_path}"
elif command -v dd >/dev/null 2>&1; then
dd if=/dev/zero bs=1024 count=256 2>/dev/null | tr '\0' 'A' >>"${icon_path}"
else
chunk="$(printf 'A%.0s' {1..1024})"
i=0
while [ "${i}" -lt 256 ]; do
printf '%s' "${chunk}" >>"${icon_path}"
i=$((i + 1))
done
fi
printf '</svg>' >>"${icon_path}"
cat <<'META' >"${WORKSPACE}/tools/large-icon/tool.meta.json"
{
"name": "large-icon-tool",
"description": "Tool with a large icon payload",
"arguments": {"type": "object", "properties": {}},
"icons": [
{"src": "./icon.svg"}
]
}
META
cat <<'SH' >"${WORKSPACE}/tools/large-icon/tool.sh"
#!/usr/bin/env bash
printf '{"result":"ok"}'
SH
chmod +x "${WORKSPACE}/tools/large-icon/tool.sh"
cat <<'JSON' >"${WORKSPACE}/requests.ndjson"
{"jsonrpc":"2.0","id":"init","method":"initialize","params":{}}
{"jsonrpc":"2.0","method":"notifications/initialized"}
{"jsonrpc":"2.0","id":"tools-list","method":"tools/list","params":{}}
JSON
test_run_mcp "${WORKSPACE}" "${WORKSPACE}/requests.ndjson" "${WORKSPACE}/responses.ndjson"
tools_resp="$(grep '"id":"tools-list"' "${WORKSPACE}/responses.ndjson" | head -n1)"
if [ -z "${tools_resp}" ]; then
test_fail "missing tools/list response"
fi
if printf '%s' "${tools_resp}" | jq -e '.error' >/dev/null 2>&1; then
test_fail "tools/list failed with large icon payload"
fi
icon_len="$(printf '%s' "${tools_resp}" | jq -r '.result.tools[] | select(.name=="large-icon-tool") | .icons[0].src | length' | head -n1)"
case "${icon_len}" in
'' | *[!0-9]*)
test_fail "expected large-icon-tool icons in tools/list response"
;;
esac
if [ "${icon_len}" -lt 200000 ]; then
test_fail "expected large data URI (length >= 200000), got ${icon_len}"
fi
printf 'Large icon registry test passed\n'
