As B2G continues to trod onwards to its release, there is still a lot of confusion about the level and state of test coverage it has. Back in November we started running mochitests, reftests and marionette/webapi tests on ARM emulators. Now we’ve also added xpcshell tests and for the most part we have these nice green letters to look at on TBPL that make us feel good about ourselves. But what is really being run? What is the meaning behind these letters “M”, “R”, “Mn” and “X...
