```ruby
FactoryGirl.define do
  factory :comment do
    author 'test'
    content 'Comment about the project'
    project
  end
end
```

Use faker for comment author and content
user
```ruby
FactoryGirl.define do
  factory :comment do
    author { Faker::Lorem.word }
    content { Faker::Lorem.sentence }
    project
  end
end
```
assistant