test: ensure notices generated do have content

package.json

@@ -130,7 +130,7 @@
     "update-commit-hash": "run-script-os",
     "update-commit-hash:darwin:linux": "COMMIT_INFO=$(git describe --exact-match --tags 2> /dev/null || git rev-parse --short HEAD); echo \"{\\\"commitInfo\\\" : \\\"$COMMIT_INFO\\\" }\" > \"src/commitInfo.json\"",
     "update-commit-hash:win32": "tools/get_app_version_for_windows.bat",
-    "generate-notice": "mkdirp notices && yarn licenses generate-disclaimer --production > notices/notices.txt && yarn node tools/generateNotices.mjs",
+    "generate-notice": "mkdirp notices && yarn licenses generate-disclaimer --production > notices/notices.txt && yarn node tools/generateNotices.mjs && ./tools/checkNotices.sh",
     "ship-linux": "yarn install-deps:linux && yarn build && tools/build_linux_release.sh",
     "ship-win": "yarn install-deps:win32 && yarn build && electron-builder --win --x64 --publish never && mkdirp release/win && mv \"release/OpossumUI Setup 0.1.0.exe\" \"release/win/OpossumUI-for-win.exe\"",
     "ship-mac": "yarn install-deps:darwin && yarn build && electron-builder --mac --x64 --publish never && zip -r -y -q 'release/mac/OpossumUI-for-mac.zip' 'release/mac/'",

tools/checkNotices.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+# SPDX-FileCopyrightText: Meta Platforms, Inc. and its affiliates
+# SPDX-FileCopyrightText: TNG Technology Consulting GmbH <https://www.tngtech.com>
+#
+# SPDX-License-Identifier: Apache-2.0
+
+NOTICE_HEADER="THE FOLLOWING SETS FORTH ATTRIBUTION NOTICES FOR THIRD PARTY SOFTWARE THAT MAY BE CONTAINED IN PORTIONS OF THE OPOSSUM UI PRODUCT."
+
+grep -q "${NOTICE_HEADER}" ./notices/notices.txt || {
+  echo "Error: Attributions not found in notices.txt"
+  exit 1
+}
+grep -q "${NOTICE_HEADER}" ./notices/notices.html || {
+  echo "Error: Attributions not found in notices.html"
+  exit 1
+}