Function testAttributedEvents

tests/attribution.tests.js:34–53

 * @param {t.TestCase} _tc
 */
export const testAttributedEvents = _tc => {
  const ydoc = new Y.Doc()
  const ytext = ydoc.get()
  ytext.insert(0, 'hello world')
  const v1 = Y.cloneDoc(ydoc)
  ydoc.transact(() => {
    ytext.delete(6, 5)
  })
  const am = Y.createAttributionManagerFromDiff(v1, ydoc)
  const c1 = ytext.toDelta(am)
  t.compare(c1, delta.create().insert('hello ').insert('world', null, { delete: [] }))
  let calledObserver = false
  ytext.observe(event => {
    const d = event.getDelta(am)
    t.compare(d, delta.create().retain(11).insert('!', null, { insert: [] }))
    calledObserver = true
  })
  ytext.applyDelta(delta.create().retain(11).insert('!'), am)
  t.assert(calledObserver)
}

/**
 * @param {t.TestCase} _tc