Support retrying timed out tests

[VasylMarchuk]

Hey @mrloop! Is there any way to retry tests that time out? Doesn't look like the test is retried if it fails due to a timeout.

We set the global timeout using QUnit.config.testTimeout, and I've also tried setting a local one using assert.timeout with no luck — it doesn't appear that the test is retried:

Code

let tryCount = 0;
retry("a flaky test that occasionally times out", async function (assert) {
  assert.timeout(5);
  console.log('tryCount', ++tryCount);
  // ... some code that occasionally times out due to reasons outside our control
  // for example:
  await timeout(1000);
});