We discovered that in a tab restore scenario we were recording view time
observations that were wrong - we'd record time deltas as-if user was
looking at the page while the browser wasn't running.
This happens because when we record a viewTime observation, we compare
current time with lastAccess time of the tab. In a restore scenario,
that lastAccess time happens to be from when the browser was last
running - which could be days ago.
The simplest solution was to not record a viewTime observation if the
url for a tab didn't change during a load event. To achieve this, we
needed to change which action we were using as a proxy for "navigation
events" - UpdateUrlAction contains the new url, allowing us to compare
against the current tab url.
Alternative solutions would be to keep using loading actions, but
dispatch a lastAccess event before performing a metadata update. This
would have worked, but would result in two lastAccess events being
dispatched for each navigation event instead of just one.
We only instrument onCreate because it's the only one with an
implementation.
While declaring this as a function that accepts a lambda is less
fragile, we've previously had issues with it such as suspected memory
leaks when used for telemetry. Therefore, we go with the simpler
approach.
This is a speculative fix for the intermittent issue. Typically, these
intermittents are caused by mocked lambdas but there is no mocked lambda
here. If this doesn't work, one `any()` argument fills in for a lambda:
it's possible that's causing the failure.
Unfortunately, I can't verify this fix easily because the "run test until
failure" option was removed from Android Studio.
See b3f5c87585 for a prior attempt to
address the intermittents in this class.
This is a bug we noticed after landing search term grouping.
An adapter can submit an empty list of items to the `ConcatAdapter`
early. This has the side-effect of triggering our `observeFirstInsert`
too soon and therefore updating the visibility to show the empty tray
placeholder and never switches back.
Our solution is to keep a constant observer on the adapter so we can
perform the visibility check on every insert/remove.
Co-authored-by: Roger Yang <royang@mozilla.com>
* For #21236: Separate tabs with the same search term into a different section in tabs tray
* Issue #21236: Scroll to selected tab + various tab fixes for groupings
* Issue #21236: Fix failing test
Co-authored-by: Jonathan Almeida <jalmeida@mozilla.com>
