}
public void testObserverZenithAngle() {
observerHelper.addObserver(sun);
assertEquals(sunState.getZenithAngle().toPercent(), sun.getZenithAngle());
sun.setZenithAngle(new Percent(75));
assertEquals(new Percent(75), sun.getZenithAngle());
assertEquals(1, observerHelper.nbUpdated());
assertEquals(SunUpdateCode.zenithAngle, observerHelper.getUpdateObjects().get(0));
}