Runtests is a command line tool that runs tests.
The most complete documentation of its capabilities and interface is the usage string it prints.
It may be useful to developers working with the bringup product configuration, since
fx test does not support running tests in that configuration. In this configuration, it can be invoked from the serial console as
runtests. To see a list of all the tests are on the device's Boot FS, run
runtests --all -d.
It is used in continuous integration infrastructure in the following ways: