RSpec的查看測試和content_for：標題

Question

我想測試我的application/layout.html.erb的標題標籤：

<title><%= content_for?(:title) ? yield(:title) : "Foo Bar" %></title> 

但我發現沒有辦法設置標題變量：

it "should show a title" do 
    # NameError: `title' is not allowed as an instance variable name 
    #view.instance_variable_set(:title, 'Test Title') 

    # Deprecation error 
    # view.stub(:title) { 'Test Title' } 

    # Fail: 
    # allow(view).to receive(:title) { 'Test Title' } 
    # view.content_for(:title) { 'Test Title' } 
    # assign(:title, 'Test Title') 
    # helper.stub(:content_for).with(:title).and_return('Test Title') 

    render 

    expect(rendered).to have_title('Test Title') 
end 

我使用Rails 4.1.4，rspec-rails 3.0.2，水豚2.4.1。有什麼建議麼？

Answer 1

你可以做這樣的事情

view.instance_variable_get("@view_flow").set(:title,"Test Title") 
render 
expect(rendered).to have_title('Test Title') 

Answer 2

如果有人需要與MINITEST做到這一點：

def setup 
    @view_flow = ActionView::OutputFlow.new 
end 

test 'when page_title is set' do 
    @view_flow.set(:page_title, "Hello") 
    expected_html = '<title>Hello | My Amazing Website</title>' 
    assert_equal expected_html, title 
end