@Test
    public void shouldAllowZeroNullInArray() {
        final String[] arr = new String[0];

        final Iterator<String> itty = new ArrayIterator<>(arr);
        assertEquals("[]", itty.toString());
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/util/iterator/ArrayIteratorTest.java