Question

When running some test with RSpec, I get this error (multiple times):

1) User Pages edit with valid information 
     Failure/Error: visit edit_user_path(user)
     ActionView::Template::Error:
       wrong number of arguments (0 for 1)
     # ./app/views/users/edit.html.haml:15:in `block in _app_views_users_edit_html_haml__2466546393595631499_70225077026800'
     # ./app/views/users/edit.html.haml:6:in `_app_views_users_edit_html_haml__2466546393595631499_70225077026800'
     # ./spec/requests/user_pages_spec.rb:54:in `block (3 levels) in <top (required)>'

I’m not familiar with reading Rails error messages; is this telling me the method being called with the wrong number of arguments is in edit.html.haml, or in user_pages_spec.rb? Is it saying that edit_user_path is being called with 0 arguments?

Edit to add my code:

edit.html.haml:

- provide(:title, "Edit user")
%h1 Update your profile

.row
    .span6.offset3
        = form_for(@user) do |f|

            = f.label :name
            = f.text_field :name

            = f.label :email
            = f.text_field :email

            = f.label :password
            = f.password_field

            = f.label :password_confirmation, "Confirm Password"
            = f.password_field :password_confirmation

            = f.submit "Save changes", class: "btn btn-large btn-primary"

Relevant portion of user_pages_spec.rb:

describe "edit" do
        let(:user) { FactoryGirl.create(:user) }
        before do
            sign_in user
            visit edit_user_path(user)
        end

        describe "page" do
            it { should have_selector('h1',    text: "Update your profile") }
            it { should have_selector('title', text: "Edit user") }
        end

        describe "with invalid information" do
            before { click_button "Save changes" }

            it { should have_content('error') }
        end

        describe "with valid information" do
            let(:new_name) { "New Name" }
            let(:new_email) { "[e-mail]" }
            before do
                fill_in "Name",             with: new_name
                fill_in "Email",            with: new_email
                fill_in "Password",         with: user.password
                fill_in "Confirm Password", with: user.password
                click_button "Save changes"
            end

            it { should have_selector('title', text: new_name) }
            it { should have_success_message('') }
            it { should have_link('Sign out', href: signout_path) }
            specify { user.reload.name.should == new_name }
            specify { user.reload.email.should == new_email }
        end 
    end

Answer 1

Basically, wrong number of arguments means that for the method, it thinks that you should be passing a certain number of variables in, and it’s receiving the wrong amount.

In this case, it expects 1 variable to be passed in and it’s receiving none.

From the looks of it, you should be looking at line 15 of your edit.html.haml file, which I’m guessing is here:

= f.label :password
= f.password_field

It looks like you’re missing :password — passing the actual variable in.

So change it to:

= f.password_field :password

and you should be good.