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POUsing Rspec, how do I test the JSON format of my controller in Rails 3.0.11?
 

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    <p>I've scoured the web, but, alas, I just can't seem to get Rspec to correctly send content-type so I can test my JSON API. I'm using the RABL gem for templates, Rails 3.0.11, and Ruby 1.9.2-p180.</p> <p>My curl output, which works fine (should be a 401, I know):</p> <pre><code>mrsnuggles:tmp gaahrdner$ curl -i -H "Accept: application/json" -X POST -d @bleh http://localhost:3000/applications HTTP/1.1 403 Forbidden Content-Type: application/json; charset=utf-8 Cache-Control: no-cache X-Ua-Compatible: IE=Edge X-Runtime: 0.561638 Server: WEBrick/1.3.1 (Ruby/1.9.2/2011-02-18) Date: Tue, 06 Mar 2012 01:10:51 GMT Content-Length: 74 Connection: Keep-Alive Set-Cookie: _session_id=8e8b73b5a6e5c95447aab13dafd59993; path=/; HttpOnly {"status":"error","message":"You are not authorized to access this page."} </code></pre> <p>Sample from one of my test cases:</p> <pre><code>describe ApplicationsController do render_views disconnect_sunspot let(:application) { Factory.create(:application) } subject { application } context "JSON" do describe "creating a new application" do context "when not authorized" do before do json = { :application =&gt; { :name =&gt; "foo", :description =&gt; "bar" } } request.env['CONTENT_TYPE'] = 'application/json' request.env['RAW_POST_DATA'] = json post :create end it "should not allow creation of an application" do Application.count.should == 0 end it "should respond with a 403" do response.status.should eq(403) end it "should have a status and message key in the hash" do JSON.parse(response.body)["status"] == "error" JSON.parse(response.body)["message"] =~ /authorized/ end end context "authorized" do end end end end </code></pre> <p>These tests never pass though, I always get redirected and my content-type is always <code>text/html</code>, regardless of how I seem to specify the type in my before block:</p> <pre><code># nope before do post :create, {}, { :format =&gt; :json } end # nada before do post :create, :format =&gt; Mime::JSON end # nuh uh before do request.env['ACCEPT'] = 'application/json' post :create, { :foo =&gt; :bar } end </code></pre> <p>Here is the rspec output:</p> <pre><code>Failures: 1) ApplicationsController JSON creating a new application when not authorized should respond with a 403 Failure/Error: response.status.should eq(403) expected 403 got 302 (compared using ==) # ./spec/controllers/applications_controller_spec.rb:31:in `block (5 levels) in &lt;top (required)&gt;' 2) ApplicationsController JSON creating a new application when not authorized should have a status and message key in the hash Failure/Error: JSON.parse(response.body)["status"] == "errors" JSON::ParserError: 756: unexpected token at '&lt;html&gt;&lt;body&gt;You are being &lt;a href="http://test.host/"&gt;redirected&lt;/a&gt;.&lt;/body&gt;&lt;/html&gt;' # ./spec/controllers/applications_controller_spec.rb:35:in `block (5 levels) in &lt;top (required)&gt;' </code></pre> <p>As you can see I'm getting the 302 redirect for the HTML format, even though I'm trying to specify 'application/json'.</p> <p>Here is my <code>application_controller.rb</code>, with the rescue_from bit:</p> <pre><code>class ApplicationController &lt; ActionController::Base rescue_from ActiveRecord::RecordNotFound, :with =&gt; :not_found protect_from_forgery helper_method :current_user helper_method :remove_dns_record rescue_from CanCan::AccessDenied do |exception| flash[:alert] = exception.message respond_to do |format| h = { :status =&gt; "error", :message =&gt; exception.message } format.html { redirect_to root_url } format.json { render :json =&gt; h, :status =&gt; :forbidden } format.xml { render :xml =&gt; h, :status =&gt; :forbidden } end end private def not_found(exception) respond_to do |format| h = { :status =&gt; "error", :message =&gt; exception.message } format.html { render :file =&gt; "#{RAILS_ROOT}/public/404.html", :status =&gt; :not_found } format.json { render :json =&gt; h, :status =&gt; :not_found } format.xml { render :xml =&gt; h, :status =&gt; :not_found } end end end </code></pre> <p>And also <code>applications_controller.rb</code>, specifically the 'create' action which is what I'm trying to test. It's fairly ugly at the moment because I'm using <code>state_machine</code> and overriding the delete method.</p> <pre><code> def create # this needs to be cleaned up and use accepts_attributes_for @application = Application.new(params[:application]) @environments = params[:application][:environment_ids] @application.environment_ids&lt;&lt;@environments unless @environments.blank? if params[:site_bindings] == "new" @site = Site.new(:name =&gt; params[:application][:name]) @environments.each do |e| @site.siteenvs &lt;&lt; Siteenv.new(:environment_id =&gt; e) end end if @site @application.sites &lt;&lt; @site end if @application.save if @site @site.siteenvs.each do |se| appenv = @application.appenvs.select {|e| e.environment_id == se.environment_id } se.appenv = appenv.first se.save end end flash[:success] = "New application created." respond_with(@application, :location =&gt; @application) else render 'new' end # super stinky :( @application.change_servers_on_appenvs(params[:servers]) unless params[:servers].blank? @application.save end </code></pre> <p>I've looked at the source code here: <a href="https://github.com/rails/rails/blob/master/actionpack/lib/action_controller/metal/responder.rb" rel="noreferrer">https://github.com/rails/rails/blob/master/actionpack/lib/action_controller/metal/responder.rb</a>, and it seems it should respond correctly, as well as a number of questions on stack overflow that seem to have similar issues and possible solutions, but none work for me.</p> <p>What am I doing wrong?</p>
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