message: making sure that the onerror returns the error
diff: @@ -132,7 +132,8 @@ describe("Player", () => {
  it("invokes onerror if no url", (done) => {
  const source = new Player({
  url: "./nosuchfile.wav",
  - onerror() {
  + onerror(e) {
  + expect(e).to.be.instanceOf(Error);
  source.dispose();
  done();
  }
  