Empty multivalue expectations consume an onNext

[simonbasle]

From @simonbasle on April 11, 2017 14:10

When a multivalue expectation (expectNextCount or expectNextSequence) is effectively empty (count of 0 or empty iterable), it should be ignored. However, these expectations instead consume one onNext event.

For instance:

StepVerifier.create(Flux.just("foo", "bar"))
            .expectNextCount(0)
            .expectNext("foo", "bar")
            .expectComplete()
            .verify();

The test above should work but fails with message

expectation "expectNext(foo)" failed (expected value: foo; actual value: bar)

Copied from original issue: reactor/reactor-addons#101