```ruby
require_relative '../../../rspecs'

RSpec.describe Sfn::Callback::StackPolicy do
  let(:ui) { double(:ui) }
  let(:config) { double(:config) }
  let(:arguments) { double(:arguments) }
  let(:api) { double(:api) }

  let(:instance) { subject.new(ui, config, arguments, api) }

  context 'with no stack polciies defined' do
    before do
    end
    it 'should not error if no policies are defined' do
    end
  end

  it 'should fail' do
    expect(true).to be false
  end
end
```

Include pending on incomplete test
user
```ruby
require_relative '../../../rspecs'

RSpec.describe Sfn::Callback::StackPolicy do
  let(:ui) { double(:ui) }
  let(:config) { double(:config) }
  let(:arguments) { double(:arguments) }
  let(:api) { double(:api) }

  let(:instance) { subject.new(ui, config, arguments, api) }

  context 'with no stack polciies defined' do
    before do
    end
    it 'should not error if no policies are defined' do
    end
  end

  it 'should fail' do
    pending
    expect(true).to be false
  end
end
```
assistant