Controller testing with js.erb format

Question

I'm using Rails 4.2.5, I've written a controller test for the destroy action, an I'm using ajax call to destroy and using destroy.js.erb file. Please help me to solve the following issue to pass the test when it calls js format, I'm pasting error below.

  def destroy  
    @status = @song.destroy  
    respond_to do |format|  
      format.js  
    end  
  end

SongsControllerTest#test_should_destroy_song:

ActionController::UnknownFormat: ActionController::UnknownFormat  
      app/controllers/songs_controller.rb:36:in `destroy' 


songs_controller_test.rb    
test "should destroy song" do  
    assert_difference('Song.count', -1) do  
      delete :destroy, id: @song  
    end  

    get :destroy, format:  'js'  
  end

destroy.js.erb

var element = document.getElementById("<%="song#{@song.id}" %>");    
<%if @status%>  
element.parentNode.parentNode.remove();  
<%end%>

Please format the code in the question accordingly and show the test code too. — Matouš Borák, Mar 27 '16 at 06:26
Possible duplicate of [In Rails, how do you functional test a Javascript response format?](http://stackoverflow.com/questions/2358214/in-rails-how-do-you-functional-test-a-javascript-response-format) — Matouš Borák, Mar 27 '16 at 06:28
Already before asking question ive tried above link, it didnt solve the error — Manoj Menon, Mar 27 '16 at 06:34

score 3 · Accepted Answer · answered Mar 27 '16 at 08:33

The destroy controller action normally reacts to the DELETE HTTP method, so you should use the format option when calling delete:

test "should destroy song" do  
  assert_difference('Song.count', -1) do  
    delete :destroy, id: @song, format: :js
  end  
end

Controller testing with js.erb format

1 Answers1