GridLienzoScrollPosition { Double currentRelativeY() { final Double delta = deltaY(); return delta == 0d ? 0d : 100 * currentY() / delta; } GridLienzoScrollPosition(final GridLienzoScrollHandler gridLienzoScrollHandler);   }
@Test public void testGetCurrentYLevel() { final Double actualLevel = gridLienzoScrollPosition.currentRelativeY(); final Double expectedLevel = 100 * CURRENT_Y / DELTA_Y; assertEquals(actualLevel, expectedLevel, 0); }