@Test
void investingNoItems() {

    final Zonky z = AbstractZonkyLeveragingTest.harmlessZonky();
    final PowerTenant tenant = mockTenant(z);
    when(tenant.getInvestmentStrategy()).thenReturn(Optional.of(ALL_ACCEPTING_INVESTMENT_STRATEGY));
    final InvestingOperationDescriptor d = mockInvestingOperationDescriptor();
    final StrategyExecutor<LoanDescriptor, InvestmentStrategy, Loan> exec = new StrategyExecutor<>(tenant, d);
    assertThat(exec.get()).isEmpty();
}