How to write a functional test case in rails 3.1 and unit:test

Question

i am new to rails testing and i am using unit:test. I have an action in my controller

 def save_campaign unless params[:app_id].blank? @app = TestApp.find(params[:app_id]) if params[:test_app] @app.update_attributes(params[:test_app]) end flash[:notice] = "Your Registration Process is completed" redirect_to "/dashboard" else redirect_to root_path end end

and my test case is as following

test "should save campagin " do assert_difference('TestApp.count', 0) do post :save_campaign, test_app: @test_app.attributes end assert_redirected_to "/dashboard" end end

This method is a post method. While running this test, it is failing and showing me a message

"should save campagin (0.07s) Expected response to be a redirect to http://test.host/dashboard but was a redirect to http://test.host/ /home/nouman/.rvm/gems/ruby-1.9.2-p290@global/gems/actionpack-3.1.3/lib/action_dispatch/testing/assertions/response.rb:67:in `assert_redirected_to'

My guess is that i am not giving it right assertion to check params

params[:app_id] and @app = TestApp.find(params[:app_id]).

How can i write such an assertion to check these attributes, check wether a parameter is blank. How can 1 find an object with a given id.

Trung Lê · Accepted Answer · 2012-04-18 23:21:40Z

For functional test, you should not care about testing the model, that is in your case, you should remove:

assert_difference('TestApp.count', 0) do .. end

What you want to know in a functional test is that if the page is loaded, redirected correctly.

In your controller, you have a condition check for params, so for each of the outcome of the check, you write a test each, that is you have to write two functional tests:

test "if app_id param is empty, #save_campaign redirect to root" do post :save_campaign, :app_id => nil assert_redirected_to root_path end test "#save_campaign" do post :save_campaign, :app_id => app_fixture_id, :test_app => @test_app.attributes.to_params assert_redirected_to '/dashboard' end

The trick to prepare the post params is to use method to_params method.

Hope this help.

UPDATE: If you just want to check if params[:app_id] GET param is in the URL, you should just check for this presence instead of checking if it is blank or not:

if params[:app_id] else end

Thanks Trung for the answer, sorry i was not aware of your response that's why accepting it after few months.

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