describe('unpack', function()
  it('produces an error if its parent errors', function()
    local observable = Rx.Observable.fromValue(''):map(function(x) return x() end)
    expect(observable.subscribe).to.fail()
    expect(observable:unpack().subscribe).to.fail()
  end)

  it('fails if the observable produces an element that is not a table', function()
    expect(Rx.Observable.fromValue(3):unpack().subscribe).to.fail()
  end)

  it('produces all elements in the tables produced as multiple values', function()
    local observable = Rx.Observable.fromTable({{1, 2, 3}, {4, 5, 6}}, ipairs):unpack()
    expect(observable).to.produce({{1, 2, 3}, {4, 5, 6}})
  end)
end)