verify(cache, times(1)).resolveSids0(isNull(), same(ctx), captor.capture());
        SID[] resolvedFirst = captor.getValue();
        assertEquals(2, resolvedFirst.length);
        assertEquals("user1", ((SID) resolvedFirst[0]).acctName);
        assertEquals("user2", ((SID) resolvedFirst[1]).acctName);

        // Second call with overlap should use cache for s2 and s3, requiring only s3 if not cached