Rails中的单元测试原理

Question

I am learning unit test in Rails framework. I have a question about controller test.

**assert_select '#columns #side a', minimum: 4**

Does this line of code mean to simulate that a user visit the page and checkout whether there are four a tags? I am confused about this. Thank you in advance.

Answer 1

Yes. Specifically, it checks there are 4 or more a tags, within a #columns #side element - that is, the CSS selector #columns #side a would have 4 or more matches. See the examples at this page: http://apidock.com/rails/ActionController/Assertions/SelectorAssertions/assert_select

and further examples at http://guides.rubyonrails.org/testing.html#testing-views