IssueTracker

Component used: androidx.paging:paging-rxjava2

Version used: 3.1.1

We're trying to upgrade our app from Paging 2.1.2 to Paging 3, so our first step is to just update the Gradle dependency. When running our test suite after the change, we noticed that RxPagedListBuilder is emitting an extra value compared to before.

To demonstrate this, the below passes in Paging 2.1.2, yet fails in Paging 3.1.1:

@Test
fun foo() {
    RxPagedListBuilder(QueryDataSourceFactory(), 10)
        .setFetchScheduler(Schedulers.trampoline())
        .setNotifyScheduler(Schedulers.trampoline())
        .buildObservable()
        .test()
        .assertValueCount(1)
  }

Is this change detailed anywhere? Is it expected?