rspec-rails

https://github.com/rspec/rspec-rails

Ruby

RSpec for Rails 5+

RSpec::Rails::Matchers#be_a_new

Passes if actual is an instance of `model_class` and returns `false` for
`persisted?`. Typically used to specify instance variables assigned to
views by controller actions

Use the `with` method to specify the specific attributes to match on the
new record.

Source | Google | Stack overflow

Edit

git clone [email protected]:rspec/rspec-rails.git

cd rspec-rails

open lib/rspec/rails/matchers/be_a_new.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-RSpec--Rails--Matchers-be_a_new-for-pr

# Commit to git

git add lib/rspec/rails/matchers/be_a_new.rbgit commit -m "better docs for RSpec::Rails::Matchers#be_a_new"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-RSpec--Rails--Matchers-be_a_new-for-pr

hub pull-request

# Celebrate!