check software package provides unit test framework for C, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install check
check is installed in your system.
Make ensure the check package were installed using the commands given below,
$ sudo dpkg-query -l | grep check *
You will get with check package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Development |
| Package | check |
| Version | 0.10.0-3+b2 [mips64el, mipsel] |
| Description | unit test framework for C |
| Sub Section | devel |