```ruby
require 'spec_helper'

describe 'rbenv::rehash' do
  let(:facts) {{
    :osfamily => 'Debian',
  }}

  context 'Version 1.2.3-p456' do
    let(:title) { '1.2.3-p456' }

    it {
      should contain_exec('rbenv rehash for 1.2.3-p456').with(
        :environment => [
          'RBENV_ROOT=/usr/lib/rbenv',
          'RBENV_VERSION=1.2.3-p456',
        ],
        :refreshonly => true
      )
    }
  end
end
```

Test :command for exec in rbenv::rehash.
user
```ruby
require 'spec_helper'

describe 'rbenv::rehash' do
  let(:facts) {{
    :osfamily => 'Debian',
  }}

  context 'Version 1.2.3-p456' do
    let(:title) { '1.2.3-p456' }

    it {
      should contain_exec('rbenv rehash for 1.2.3-p456').with(
        :command     => '/usr/bin/rbenv rehash',
        :environment => [
          'RBENV_ROOT=/usr/lib/rbenv',
          'RBENV_VERSION=1.2.3-p456',
        ],
        :refreshonly => true
      )
    }
  end
end
```
assistant