rspec 3.0

failing_spec.rb

# Documentation
# https://relishapp.com/rspec/rspec-expectations/v/3-0/docs/built-in-matchers
# expect(actual).to exist # passes if actual.exist? and/or actual.exists? are truthy

### Class

Member < ActiveRecord:Base
end

### Specs

# wrong
member = Member.find_by(group_id: group_id)
expect(member).to exist

Failure/Error: expect(member).to exist
expected #<Member ..> to exist but it does not respond to either `exist?` or `exists?`

# correct
member = Member.where(group_id: group_id)
expect(member).to exist