@Test
public void testGetScale() {

	list1.addValue(-1L, 10F);
	list1.addValue(-2L, -3F);
	list1.addValue(30L, 3F);
	list1.addValue(2L, -100F);
	list1.addValue(31L, -102F);
	/* expected = 32 / range */
	assertEquals(10L, list1.getXScale(3).longValue());
	assertEquals(6L, list1.getXScale(5).longValue());
}