To build the dotnet core components you need the dotnet command line utility installed.
It can be obtained for your chosen platform here.
You will also need mono 5.x.
Run ./build.sh (linux/osx) or build.bat (windows) to trigger code generation and complete a dotnet core build.
To run the tests simply run run-tests.sh (linux/osx) or run-tests.bat (windows). This will run the entire test suite. There is currently no way to only run a subset of tests.
If you get a warning saying rabbitmqctl cannot be found please set the RABBITMQ_RABBITMQCLT_PATH environment variable to point to where rabbitmqctl can be located.