require 'test/spec' require 'rack/mock' require 'rack/contrib/jsonp' context "Rack::JSONP" do context "when a callback parameter is provided" do specify "should wrap the response body in the Javascript callback if JSON" do test_body = '{"bar":"foo"}' callback = 'foo' app = lambda { |env| [200, {'Content-Type' => 'application/json'}, [test_body]] } request = Rack::MockRequest.env_for("/", :params => "foo=bar&callback=#{callback}") body = Rack::JSONP.new(app).call(request).last body.should.equal ["#{callback}(#{test_body})"] end specify "should not wrap the response body in a callback if body is not JSON" do test_body = '{"bar":"foo"}' callback = 'foo' app = lambda { |env| [200, {'Content-Type' => 'text/plain'}, [test_body]] } request = Rack::MockRequest.env_for("/", :params => "foo=bar&callback=#{callback}") body = Rack::JSONP.new(app).call(request).last body.should.equal ['{"bar":"foo"}'] end specify "should update content length if it was set" do test_body = '{"bar":"foo"}' callback = 'foo' app = lambda { |env| [200, {'Content-Type' => 'application/json', 'Content-Length' => test_body.length}, [test_body]] } request = Rack::MockRequest.env_for("/", :params => "foo=bar&callback=#{callback}") headers = Rack::JSONP.new(app).call(request)[1] expected_length = test_body.length + callback.length + "()".length headers['Content-Length'].should.equal(expected_length.to_s) end specify "should not touch content length if not set" do test_body = '{"bar":"foo"}' callback = 'foo' app = lambda { |env| [200, {'Content-Type' => 'application/json'}, [test_body]] } request = Rack::MockRequest.env_for("/", :params => "foo=bar&callback=#{callback}") headers = Rack::JSONP.new(app).call(request)[1] headers['Content-Length'].should.equal nil end specify "should modify the content type to application/javascript" do test_body = '{"bar":"foo"}' callback = 'foo' app = lambda { |env| [200, {'Content-Type' => 'application/json'}, [test_body]] } request = Rack::MockRequest.env_for("/", :params => "foo=bar&callback=#{callback}") headers = Rack::JSONP.new(app).call(request)[1] headers['Content-Type'].should.equal('application/javascript') end end specify "should not change anything if no callback param is provided" do test_body = ['{"bar":"foo"}'] app = lambda { |env| [200, {'Content-Type' => 'application/json'}, test_body] } request = Rack::MockRequest.env_for("/", :params => "foo=bar") body = Rack::JSONP.new(app).call(request).last body.should.equal test_body end specify "should not change anything if it's not a json response" do test_body = '404 Not Found' app = lambda { |env| [404, {'Content-Type' => 'text/html'}, [test_body]] } request = Rack::MockRequest.env_for("/", :params => "callback=foo", 'HTTP_ACCEPT' => 'application/json') body = Rack::JSONP.new(app).call(request).last body.should.equal [test_body] end end