message: testing closing edge case
diff: @@ -21,6 +21,11 @@ context("OfflineContext", () => {
  return ctx.dispose();
  });
  + it("closing shouldn't do anything", () => {
  + const ctx = new OfflineContext(1, 0.1, 44100);
  + return ctx.close();
  + });
  +
  it("can render audio", () => {
  const ctx = new OfflineContext(1, 0.2, 44100);
  const osc = ctx.createOscillator();
  