Integration test for a scaffolded Post(title, content) which goes through all the pages. No validations

gistfile1.rb

require 'test_helper'

class MainTest < ActionDispatch::IntegrationTest

  def test_main
    #index looks ok
    get '/'
    assert_tag(:a, child: "New Post")
    assert_select("a[href=/posts/new]")

    # new form
    get "/posts/new"

    assert_select("form[action=\"/posts\"]")
    assert_select("form[method=post]")
    assert_select("input[id=post_title]")
    assert_select("textarea[id=post_content]")

    # submit new post
    post "posts", post: {title: "new title", content: "new content"}

    follow_redirect!

    # check the post page
    assert_tag(:p, child: /new title/)
    assert_tag(:p, child: /new content/)
    assert_tag(:p, child: /Post was successfully created/)
    assert_select("a[href=/posts]")

    # check the index page
    get "/posts"
    assert_tag(:td, child: "new title")
    assert_tag(:td, child: /new content/)
    assert_no_tag(:p, child: /Post was successfully created/)

    # go to edit page
    assert_select("a[href=/posts/#{Post.last.id}/edit]")
    get "posts/#{Post.last.id}/edit"


    assert_select("form[action=\"/posts/#{Post.last.id}\"]")
    assert_select("form[method=post]")
    assert_select("input[value=new title]")
    assert_tag(:textarea, child: /new content/)

    # update
    patch "posts/#{Post.last.id}", post: {title: "more title", content: "more content"}

    follow_redirect!

    # check the post page
    assert_tag(:p, child: /more title/)
    assert_tag(:p, child: /more content/)
    assert_tag(:p, child: /Post was successfully updated/)

    # check the index page

    get "/posts"
    assert_tag(:td, child: "more title")
    assert_tag(:td, child: /more content/)
    assert_no_tag(:p, child: /Post was successfully created/)

    # delete

    delete "/posts/#{Post.last.id}/"
    follow_redirect!
    assert_no_tag(:td, child: "more title")
    assert_no_tag(:td, child: /more content/)
  end
end