Test Single delay

Question

I am trying to skip Single.delay() and my test falls with error:

java.lang.AssertionError: Not completed (latch = 1, values = 0, errors = 0, completions = 0)

val testScheduler = TestScheduler()
RxJavaPlugins.setComputationSchedulerHandler { testScheduler }

Single.just("")
        .delay(1, TimeUnit.SECONDS, testScheduler)
        .test()
        .assertComplete()

testScheduler.advanceTimeBy(1, TimeUnit.SECONDS)

this code works ok with Observable, is there any way to skip .delay() for Single?

score 1 · Accepted Answer · answered Oct 01 '18 at 17:05

You are asserting immediately before you even moved the time. Assert separately:

val testScheduler = TestScheduler()

val to = Single.just("")
        .delay(1, TimeUnit.SECONDS, testScheduler)
        .test()

to.assertEmpty();

testScheduler.advanceTimeBy(1, TimeUnit.SECONDS)

to.assertComplete();

Also setting the default scheduler and using a custom scheduler with the operator makes no sense.

Test Single delay

1 Answers1