Posted on Oct 8, 2019

[RSpec] layout: false, how to test it?

🤔 Situation

# HogeController def show return render :expired, layout: false if @hoge.expired? end

Test matrix

@hoge.expired?	view_template	layout
true	views/hoges/expired.html.erb	-
false	views/hoges/show.html.erb	layouts/application.html.erb

👍 Solution

# hoges_controller_spec.rb subject { get :show, id: hoge.id } context 'expired' do let(:hoge) { create(:hoge, :expired) } it do expect(subject).to be_success # 🦄 write the layout: [] explicitly expect(subject).to render_template(template: :expired, layout: []) end end context 'valid' do let(:hoge) { create(:hoge, :valid) } it do expect(subject).to be_success expect(subject).to render_template(template: :show, layout: 'layouts/application') end end

👎 Falsenegative Testing

If you don't specify the template and layout, the render_template assert only the template.

Example

expect(subject).to render_template(:show, 'layouts/application')

Here, @expected should be "show, layouts/application".

[2] render_template :show, 'layouts/application' => #<RSpec::Rails::Matchers::RenderTemplate::RenderTemplateMatcher:0x00007ffd90dba7fc @expected="show", 👎 @message="layouts/application", 👎 @redirect_is=nil, @scope=#