@Test
public void when_getting_up_particles_with_an_empty_store__store_should_return_an_empty_stream() {

	InMemoryAtomStore inMemoryAtomStore = new InMemoryAtomStore();
	Stream<Particle> upParticles = inMemoryAtomStore.getUpParticles(mock(RadixAddress.class), null);
	assertThat(upParticles).isEmpty();
}