message: MINOR: Fix unhandled promise rejections.
diff: @@ -206,8 +206,8 @@ describe("MapViewImageCache", function() {
  it("#add images with same url but differing names", function() {
  const cache = new MapViewImageCache();
  - cache.addImage("testImage1", "httpx://naxos.de");
  - cache.addImage("testImage2", "httpx://naxos.de");
  + cache.addImage("testImage1", "httpx://naxos.de", false);
  + cache.addImage("testImage2", "httpx://naxos.de", false);
  const testImage1 = cache.findImageByName("testImage1");
  const testImage2 = cache.findImageByName("testImage2");
  @@ -221,8 +221,8 @@ describe("MapViewImageCache", function() {
  it("#add images with same name but differing urls", function() {
  const cache = new MapViewImageCache();
  assert.throws(() => {
  - cache.addImage("testImage", "httpx://naxos.de");
  - cache.addImage("testImage", "httpx://naxos.de-2");
  + cache.addImage("testImage", "httpx://naxos.de", false);
  + cache.addImage("testImage", "httpx://naxos.de-2", false);
  });
  });
  @@ -246,8 +246,8 @@ describe("MapViewImageCache", function() {
  it("#remove image 2", function() {
  const cache = new MapViewImageCache();
  - cache.addImage("testImage1", "httpx://naxos.de");
  - cache.addImage("testImage2", "httpx://naxos.de");
  + cache.addImage("testImage1", "httpx://naxos.de", false);
  + cache.addImage("testImage2", "httpx://naxos.de", false);
  assert.exists(cache.findImageByName("testImage1"));
  assert.exists(cache.findImageByName("testImage2"));
  