Function testBasicFormat

tests/y-text.tests.js:1291–1324

 * @param {t.TestCase} tc
 */
export const testBasicFormat = tc => {
  const { users, text0 } = init(tc, { users: 2 })
  let eventDelta
  text0.observe(event => {
    eventDelta = event.delta
  })
  text0.insert(0, 'abc', { bold: true })
  t.assert(text0.toString() === 'abc', 'Basic insert with attributes works')
  t.compare(text0.toDelta(), delta.create().insert('abc', { bold: true }).done())
  t.compare(eventDelta, delta.create().insert('abc', { bold: true }))
  text0.delete(0, 1)
  t.assert(text0.toString() === 'bc', 'Basic delete on formatted works (position 0)')
  t.compare(text0.toDelta(), delta.create().insert('bc', { bold: true }).done())
  t.compare(eventDelta, delta.create().delete(1))
  text0.delete(1, 1)
  t.assert(text0.toString() === 'b', 'Basic delete works (position 1)')
  t.compare(text0.toDelta(), delta.create().insert('b', { bold: true }).done())
  t.compare(eventDelta, delta.create().retain(1).delete(1))
  text0.insert(0, 'z', { bold: true })
  t.assert(text0.toString() === 'zb')
  t.compare(text0.toDelta(), delta.create().insert('zb', { bold: true }).done())
  t.compare(eventDelta, delta.create().insert('z', { bold: true }))
  // @ts-ignore
  t.assert(text0._start.right.right.right.content.str === 'b', 'Does not insert duplicate attribute marker')
  text0.insert(0, 'y')
  t.assert(text0.toString() === 'yzb')
  t.compare(text0.toDelta(), delta.create().insert('y').insert('zb', { bold: true }).done())
  t.compare(eventDelta, delta.create().insert('y'))
  text0.format(0, 2, { bold: null })
  t.assert(text0.toString() === 'yzb')
  t.compare(text0.toDelta(), delta.create().insert('yz').insert('b', { bold: true }).done())
  t.compare(eventDelta, delta.create().retain(1).retain(1, { bold: null }))
  compare(users)
}

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