test: Improve to use template literals
Checklist
- [ x]
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added - [x ] commit message follows commit guidelines
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
make -j4 test
(UNIX), or vcbuild test
(Windows) passes