hook.vimspec

Describe fern#hook
  Describe #emit()
    It emits hooks added by #add()
      let ns1 = []
      let ns2 = []
      call fern#hook#add('t', { -> extend(ns1, a:000) })
      call fern#hook#add('t', { -> extend(ns2, a:000) })
      call fern#hook#emit('t', 'hello', 'world')
      Assert Equals(ns1, ['hello', 'world'])
      Assert Equals(ns2, ['hello', 'world'])
    End

    It emits hooks added by #add() and remove 'once' hooks
      let ns1 = []
      let ns2 = []
      call fern#hook#add('t', { -> extend(ns1, a:000) })
      call fern#hook#add('t', { -> extend(ns2, a:000) }, {
            \ 'once': 1,
            \})
      call fern#hook#emit('t', 'hello', 'world')
      Assert Equals(ns1, ['hello', 'world'])
      Assert Equals(ns2, ['hello', 'world'])

      call fern#hook#emit('t', 'hello', 'world')
      Assert Equals(ns1, ['hello', 'world', 'hello', 'world'])
      Assert Equals(ns2, ['hello', 'world'])
    End
  End

  Describe #remove()
    It removes a specified hook
      let ns1 = []
      let ns2 = []
      call fern#hook#add('t', { -> extend(ns1, a:000) })
      call fern#hook#add('t', { -> extend(ns2, a:000) }, {
            \ 'id': 'remove this'
            \})
      call fern#hook#remove('t', 'remove this')
      call fern#hook#emit('t', 'hello', 'world')
      Assert Equals(ns1, ['hello', 'world'])
      Assert Equals(ns2, [])
    End

    It removes all hooks if no {id} has specified
      let ns1 = []
      let ns2 = []
      call fern#hook#add('t', { -> extend(ns1, a:000) })
      call fern#hook#add('t', { -> extend(ns2, a:000) }, {
            \ 'id': 'remove this'
            \})
      call fern#hook#remove('t')
      call fern#hook#emit('t', 'hello', 'world')
      Assert Equals(ns1, [])
      Assert Equals(ns2, [])
    End
  End
End