```ruby
require 'test_helper'

describe Api::StoryImagesController do
  let(:story_image) { create(:story_image) }
  let(:story) { story_image.story }
  let(:account) { story.account }
  let(:token) { StubToken.new(account.id, ['member']) }

  before(:each) do
    class << @controller; attr_accessor :prx_auth_token; end
    @controller.prx_auth_token = token
    @request.env['CONTENT_TYPE'] = 'application/json'
  end

  it 'should show' do
    get(:show, api_request_opts(story_id: story.id, id: story_image.id))
    assert_response :success
  end

  it 'should list' do
    story_image.id.wont_be_nil
    get(:index, api_request_opts(story_id: story.id))
    assert_response :success
  end

  it 'should update' do
    image_hash = { credit: 'blah credit' }
    put(:update, image_hash.to_json, api_request_opts(story_id: story.id, id: story_image.id))
    assert_response :success
    StoryImage.find(story_image.id).credit.must_equal('blah credit')
  end
end
```

Add tests for create, update, and announce messaging
user
```ruby
require 'test_helper'

describe Api::StoryImagesController do
  let(:story_image) { create(:story_image) }
  let(:story) { story_image.story }
  let(:account) { story.account }
  let(:token) { StubToken.new(account.id, ['member']) }

  before(:each) do
    class << @controller; attr_accessor :prx_auth_token; end
    @controller.prx_auth_token = token
    @request.env['CONTENT_TYPE'] = 'application/json'
    clear_messages
  end

  it 'should show' do
    get(:show, api_request_opts(story_id: story.id, id: story_image.id))
    assert_response :success
  end

  it 'should list' do
    story_image.id.wont_be_nil
    get(:index, api_request_opts(story_id: story.id))
    assert_response :success
  end

  it 'should update' do
    image_hash = { credit: 'blah credit' }
    put(:update, image_hash.to_json, api_request_opts(story_id: story.id, id: story_image.id))
    assert_response :success
    last_message['subject'].to_s.must_equal 'image'
    last_message['action'].to_s.must_equal 'update'
    StoryImage.find(story_image.id).credit.must_equal('blah credit')
  end

  it 'should create' do
    image_hash = {
      upload: 'http://thisisatest.com/guid1/image.gif',
      set_story_uri: api_story_url(story)
    }
    post(:create, image_hash.to_json, api_request_opts(story_id: story.id))
    assert_response :success
    last_message['subject'].to_s.must_equal 'image'
    last_message['action'].to_s.must_equal 'create'
  end
end
```
assistant