ping is an old utility, which has received many changes and updates through the years.
Some of these changes may have introduced small bugs, in part due to the lack of tests.
This is a draft of what I have in mind with the basic set of tests for ping, this time using the native python interface (atf-python), IT WILL NOT BE COMMITTED AS IS (the tests are just the current shell-based tests + a few of my tests for D37930 + some intentional failures).
The idea with this revision is to gather suggestions before I start investing time with the more complex, scapy-helped tests (see D37876).
Given there is no precedent in base, I present it as a draft here.