@Test
    void requireThatCloneIsImplemented() throws CloneNotSupportedException {
        RangePartition node1 = new RangePartition("foo=300-399");
        RangePartition node2 = node1.clone();
        assertEquals(node1, node2);
        assertNotSame(node1, node2);
    }
@author <a href="mailto:magnarn@yahoo-inc.com">Magnar Nedland</a>
predicate-search-core/src/test/java/com/yahoo/document/predicate/RangePartitionTest.java