The $interval service simplifies creating and testing recurring tasks.
This service does not increment $browser's outstanding request count,
which means that scenario tests and Protractor tests will not timeout
when a site uses a polling function registered by $interval. Provides
a workaround for #2402.
For unit tests, repeated tasks can be controlled using ngMock$interval's
tick(), tickNext(), and tickAll() functions.
When calling $timeout.flush with or without a delay an exception should
be thrown if there is nothing to be flushed.
This prevents tests from flushing stuff unnecessarily.
BREAKING CHANGE: calling $timeout.flush(delay) when there is no task to be flushed
within the delay throws an exception now.
Please adjust the delay or remove the flush call from your tests as the exception
is a signed of a programming error.
Make sure $timeout callbacks are forgotten about immediately after
execution or cancellation.
Previously when passing invokeApply=false, the cleanup used $q and so
would be pending until the next $digest was triggered. This does not
make a large functional difference, but can be very visible when
looking at memory consumption of an app or debugging around the
$$asyncQueue - these callbacks can have a big retaining tree.
$timeout has a better name ($defer got often confused with something related to $q) and
is actually promise based with cancelation support.
With this commit the $defer service is deprecated and will be removed before 1.0.
Closes#704, #532
