_form.html.erb

<%= form_for(@post) do |f| %>
<% end %>

guard.sh

Running: spec/views/posts/new.html.erb_spec.rb

posts/new.html.erb
  renders new post form (FAILED - 1)

Failures:

  1) posts/new.html.erb renders new post form
     Failure/Error: assert_select "input#post_title", name: 'post[title]'
     MiniTest::Assertion:
       Expected at least 1 element matching "input#post_title", found 0.
     # (eval):2:in `assert'
     # ./spec/views/posts/new.html.erb_spec.rb:15:in `block (3 levels) in <top (required)>'
     # ./spec/views/posts/new.html.erb_spec.rb:14:in `block (2 levels) in <top (required)>'

Finished in 0.36057 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/views/posts/new.html.erb_spec.rb:8 # posts/new.html.erb renders new post form

new.html.erb_spec.rb

require File.expand_path('spec/spec_helper')

describe "posts/new.html.erb" do
  before(:each) do
    assign(:post, stub_model(Post).as_new_record)
  end

  it "renders new post form" do
    render

    assert_select "form", action: posts_path, method: 'post' do
      assert_select "input#post_title", name: 'post[title]'
    end
  end
end