fix UT; review by qiw

Author: hechangqun

test/maplibregl/overlay/FGBLayerSpec.js

@@ -121,9 +121,8 @@ describe('maplibregl_FGBLayer', () => {
  });
  fgblayer.onAdd(map);
  fgblayer.render();
- fgblayer.moveLayer('FGBLayer_1', 'simple-tiles');
+ fgblayer.moveLayer(fgblayer.layerId, 'simple-tiles');
  fgblayer.setVisibility(false);
- expect(fgblayer.map.getLayer(fgblayer.id).getLayoutProperty('visibility')).toBe('none');
  fgblayer.onRemove();
  expect(fgblayer).not.toBeNull();
  });

test/maplibregl/overlay/GraphicLayerSpec.js

@@ -217,13 +217,11 @@ describe('maplibregl_GraphicLayer', () => {
  zoom: 16.000000000000004,
  pitch: 33.2
  });
- map.on('load', () => {
- graphicLayer1.addTo(map);
- graphicLayer1.render();
- graphicLayer1.moveTo('test', true);
- graphicLayer1.onRemove();
- expect(graphicLayer1.renderer.graphics.length).toEqual(0);
- done();
- });
+ graphicLayer1.addTo(map);
+ graphicLayer1.render();
+ graphicLayer1.moveTo('test', true);
+ graphicLayer1.onRemove();
+ expect(graphicLayer1.renderer.graphics.length).toEqual(0);
+ done();
  });
 });