An RSpec matcher for checking HTTP response codes from a Rails Controller

have_status_code.rb

RSpec::Matchers.define :have_status_code do |expected|
  match do |response|
    response.status == expected
  end

  description do
    "be #{expected} (#{lookup_human_code(expected)})"
  end

  failure_message_for_should do |actual|
    "expected response code to be #{expected} (#{lookup_human_code(expected)}) but was #{response.status} (#{lookup_human_code(response.status)})"
  end

  def lookup_human_code(code)
    Rack::Utils::HTTP_STATUS_CODES[code]
  end
end