@Test
public void isCancelledReturnsTrueIffCancelled() {
assertThat(cut.isCancelled(), is(false));
cut.setCancelled();
assertThat(cut.isCancelled(), is(true));
}
@Test
public void setIsDoneReturnsFalseIfCancelled() {
cut.setCancelled();
assertThat(cut.isDone(), is(false));
}
@Test(expected = CancellationException.class)
public void setCancelledLeadsToCancelledException()
throws CancellationException, InterruptedException, ExecutionException {
cut.setCancelled();
cut.get();
}