How to add a delay to Rails controller for testing?

How to add a delay to Rails controller for testing?

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ActionController::UnknownFormat

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VCRProxy: Record PhantomJS ajax calls with VCR inside Capybara

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Rails: POST 422 (Unprocessable Entity) in Rails? Due to the routes or the controller?

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How to enable CORS in Rails 4 App

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How to disable a form submit button "a là Ruby on Rails Way"?

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Rails 4: How to upload files with AJAX

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Rails Ajax Can't verify CSRF token Authenticity

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How to display an animated icon during Ajax request processing - Rails 3

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passing array of objects from js to rails

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Rails 3.2.2 not executing rjs

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Rails 2 to Rails 3 : using link_to instead of link_to_remote (including remote and update)

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Star rating in AJAX with Ruby On Rails [closed]

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