```ruby
require 'rails_helper'

RSpec.describe Shift, type: :model do
  pending "add some examples to (or delete) #{__FILE__}"
end
```

Add validation and belonging specs to shifts
user
```ruby
require 'rails_helper'

RSpec.describe Shift, type: :model do
  it { is_expected.to validate_presence_of(:volunteers_needed)}
  it { is_expected.to validate_presence_of(:starts_at)}
  it { is_expected.to validate_presence_of(:ends_at)}

  it { is_expected.to belong_to(:event)}
end
```
assistant