// Pushing an op to the head should never merge
queue.insertHead(Arrays.asList(util.noOpDocOp("blipA")));
// Get a server op
transformer.expect(util.noOpDocOp("blipA")).echo();
transformer.expect(util.noOpDocOp("blipA")).echo();
assertEquals(transformer.getOutputServerDelta(), // \u2620
queue.transform(transformer.getInputServerDelta()));
// Should be 2 deltas a the first one is not mergable