nunit-console binary package in Ubuntu Xenial i386

 NUnit is a unit testing framework for all .NET languages. It serves the
 same purpose as JUnit does in the Java world. It supports test
 categories, testing for exceptions and writing test results in plain
 text or XML.
 .
 NUnit targets the CLI (Common Language Infrastructure) and supports Mono and
 the Microsoft .NET Framework.
 .
 This package contains the console front-end.

Source package