The `waitUntilCalled` utility now has a timeout. It will now throw an
error if the stub is not called enough times, rather than blocking
forever.
The return type had to be changed to a function, so that we could throw
when the timeout is triggered. I tried returning an error that rejected
first, but if you don't handle the error synchronously Node.js will
consider it to be an unhandled Promise rejected (even if it _is_
handled later on).
I worked around this by resolving in the timeout case as well, so that
there is never a "deferred" Promise exception in the timeout case. The
returned function re-throws the error if it's given. That way there is
never any unhandled Promise rejection.
The metrics e2e test would fail if the segment events still weren't
dispatched when the page loaded. The Segment events are sent on a set
interval, so it isn't abnormal for them to lag behind the page load
itself. The `waitUntilCalled` utility has been used to wait until all
required events have been dispatched.
The `wait-until-called` module was converted to an ES5 module, so that
it could be used from an e2e test. The optional `callCount` parameter
has also been added, to allow waiting for more than one call.
The `segmentSpy` had to be converted to a `segmentStub`, to allow the
`waitUntilCalled` utility to be used.
Unit tests have been added to the incoming transactions controller to
ensure that block updates are correctly resulting in state updates when
incoming transactions are enabled. All other events that trigger state
updates are tested as well.
The tests were written to be minimally dependent upon implementation
details of the controller itself. `nock` was used to mock the API
response from Etherscan. Each event is triggered asynchronously by
`sinon`, as in production they are likely only triggered
asynchronously.
This was extracted from #9583
This PR includes a new `wait-until-called` module meant to help with
writing asynchronous tests. It allows you to wait until a stub has been
called.
