@Test
public void shouldFindElementInSet() {

	final IJsonNode result = new ElementInSetExpression(new InputSelection(0), Quantor.EXISTS_IN,
		new InputSelection(1)).evaluate(
		createArrayNode(IntNode.valueOf(2),
			createArrayNode(IntNode.valueOf(1), IntNode.valueOf(2), IntNode.valueOf(3))));
	Assert.assertEquals(BooleanNode.TRUE, result);
}