The default "yarn test" command runs ALL tests 3 times

Problem

On my machine, when I run yarn test, or yarn test --silent, all tests execute 3 times. The desired behavior, since this actually executes ember exam --split=3 --weighted --parallel would be that 3 partitions would run, each running a fraction of the tests. In addition to that, the 3 partitions run consecutively, not in parallel.

This seems to be related to https://github.com/trentmwillis/ember-exam/issues/108 and, following the conversations there and adding parallel: -1 to testem.js seems to cause the partitions to execute in paralel, but each partition still runs all of the tests in the suite.

[joshsmith]

Then we can just amend ember-try.json to use ember exam only. No need for docs IMO.

[begedin]

It’s not a matter of speeding up for me, since I use ember exam anyway.

It’s a matter of there being a “default” command (yarn test) which runs 3x slower than it should, due to a bug that doesn’t originate from us.

I’m thinking something like

• yarn test should just execute ember exam instead of ember exam --split=3 --weighted --parallel
• add some docs pointing the user on how they might try to speed it up by enabling parallelism, with a note that it may be buggy