RSpec & Rails：帮助规范的存根 request.path

Question

我在ApplicationHelper中有这个方法：

def home_link_class
  classes = ['navbar-brand']
  classes << 'active' if request.path == root_path
  classes
end

我想这样测试：

describe '#home_link_class' do
  before  { allow(helper.request).to receive(:path).and_return '/some-path' }
  subject { home_link_class }

  it { should eq ['navbar-brand'] }
end

遗憾的是，存根似乎不起作用，助手本身中的 request 对象设置为 nil，即使在规范中它似乎是 ActionController::TestRequest对象。

如何确保 request 在规范中可用？

Answer 1

您需要存根请求本身以及路径的 return 值。为存根 path:

的请求定义一个测试替身

describe '#home_link_class' do
  let(:request) { double('request', path: '/some-path') }

  before  { allow(helper).to receive(:request).and_return(request) }
  subject { home_link_class }

  it { should eq ['navbar-brand'] }
end

RSpec & Rails：帮助规范的存根 request.path

RSpec & Rails: Stub request.path for helper spec

rspec

ruby-on-rails

request