@Test
public void testCanZoomOutAtLowerBoundary() {
ZoomLevel.getInstance().setZoomLevel(ZoomLevel.getInstance().getZoomLevelAmount() - 1);
assertEquals(true, ZoomLevel.getInstance().zoomOut());
}
@Test
public void testCanZoomOutAtMiddlePosition() {
ZoomLevel.getInstance().setZoomLevel(ZoomLevel.getInstance().getZoomLevelAmount() / 2);
assertEquals(true, ZoomLevel.getInstance().zoomOut());
}
@Test
public void testCanZoomOutAtUpperBoundary() {
ZoomLevel.getInstance().setZoomLevel(0);
assertEquals(false, ZoomLevel.getInstance().zoomOut());
}
@Test
public void testCanZoomInAtUpperBoundary() {
ZoomLevel.getInstance().setZoomLevel(0);
assertEquals(true, ZoomLevel.getInstance().zoomIn());
}
@Test
public void testFindZoomAboveUpperBoundary() {
double testZoomLevel = -1;
assertEquals(
ZoomLevel.getInstance().getZoomLevelAmount() - 1,
ZoomLevel.getInstance().findIndex(testZoomLevel));
}
@Test
public void testCanZoomOutWorks() {
ZoomLevel.getInstance().setZoomLevel(ZoomLevel.getInstance().getZoomLevelAmount() - 1);
int preZoomLevel = ZoomLevel.getInstance().getZoomIndex();
ZoomLevel.getInstance().zoomOut();
assertEquals(preZoomLevel - 1, ZoomLevel.getInstance().getZoomIndex());
}
@Test
public void testCanZoomInWorks() {
ZoomLevel.getInstance().setZoomLevel(0);
int preZoomLevel = ZoomLevel.getInstance().getZoomIndex();
ZoomLevel.getInstance().zoomIn();
assertEquals(preZoomLevel + 1, ZoomLevel.getInstance().getZoomIndex());
}
@Test
public void testFindZoomWorks() {
int targetIndex = ZoomLevel.getInstance().getZoomLevelAmount() / 2;
double difference =
ZoomLevel.getInstance().getZoomLevel(targetIndex)
- ZoomLevel.getInstance().getZoomLevel(targetIndex + 1);
double testZoomLevel = ZoomLevel.getInstance().getZoomLevel(targetIndex) - (difference / 2);
assertEquals(targetIndex, ZoomLevel.getInstance().findIndex(testZoomLevel));
}
@Test
public void testFindZoomAtLowerBoundary() {
double testZoomLevel = 1.5;
assertEquals(0, ZoomLevel.getInstance().findIndex(testZoomLevel));
}