如何使用application_helper_spec.rb中的特定URL测试请求对象？

Question

I have a method defined in application_helper.rb that returns a canonical URL based on the current request. How can I mock or otherwise specify a complete URL for the controller?

# spec/helpers/application_helper_spec.rb
describe "#canonical_url" do
  it "should return a path to an asset that includes the asset_host" do
    # Given: "http://www.foo.com:80/asdf.asdf?asdf=asdf"
    helper.canonical_url().should eq("http://www.foo.com/asdf.asdf")
  end
end

# app/helpers/application_helper.rb
def canonical_url
  "#{request.protocol}#{request.host}#{(request.port == 80) ? "" : request.port_string}#{request.path}"
end

EDIT :

Ultimately I want to test that canonical_url() returns the proper string for a bunch of different URLs, some with ports, some w/o, some with querystrings, some with paths, etc. Maybe that's overkill, but that is the end goal. I would like to both explicitly stub/mock/whatever the initial URL and then explicitly set the expectation in the matcher. I would love to be able to do this in one call, ie controller.request.url = 'http://www.foo.com:80/asdf.asdf?asdf=asdf' or request = ActionController::TestRequest.new :url => 'http://www.foo.com:80/asdf.asdf?asdf=asdf' but so far I have not found a single "hook" that allows me to do so. So that is the solution I'm looking for. How do I explicitly define the request URL for a given test.

Answer 1

I'd have done:

helper.request.stub(:protocol).and_return("http://")
helper.request.stub(:host).and_return("www.foo.com")
helper.request.stub(:port).and_return(80)
helper.request.stub(:port_string).and_return(":80")
helper.request.stub(:path).and_return("/asdf.asdf")
helper.canonical_url.should eq("http://www.foo.com/asdf.asdf")

Answer 2

The ultimate cause of this confusion lies in ActionPack:

• ActionDispatch::TestRequest
• ActionDispatch::Http::URL

eg if you set a port (ActionDispatch::TestRequest)

def port=(number)
  @env['SERVER_PORT'] = number.to_i
end

eg then you read it (ActionDispatch::Http::URL)

def raw_host_with_port
  if forwarded = env["HTTP_X_FORWARDED_HOST"]
    forwarded.split(/,\s?/).last
  else
    env['HTTP_HOST'] || "#{env['SERVER_NAME'] || env['SERVER_ADDR']}:#{env['SERVER_PORT']}"
  end
end

Setting SERVER_PORT will only take effect if you have no SERVER_NAME, HTTP_X_FORWARDED_HOST or HTTP_HOST already set.

My basic workaround for port settings was to add the port to the host - because request.port doesn't do what you want typically.

eg to set the port

request.host = 'example.com:1234'

The real answer is to read the code in ActionPack; it's fairly straightforward.

Answer 3

Very late to this party, but found it googling something similar.

How about:

allow_any_instance_of(ActionController::TestRequest).to receive(:host).and_return('www.fudge.com')

I appreciate allow_any_instance_of is sometimes frowned upon, but this does seem to get the job done.