```ruby
require 'spec_helper'

describe 'mysql::backup' do

  let(:params) {
    { 'backupuser'     => 'testuser',
      'backuppassword' => 'testpass',
      'backupdir'      => '/tmp',
    }
  }

  it { should contain_database_user('testuser@localhost')}

  it { should contain_database_grant('testuser@localhost').with(
    :privileges => [ 'Select_priv', 'Reload_priv', 'Lock_tables_priv', 'Show_view_priv' ]
  )}

  it { should contain_cron('mysql-backup').with(
    :command => '/usr/local/sbin/mysqlbackup.sh',
    :ensure  => 'present'
  )}

  it { should contain_file('mysqlbackup.sh').with(
    :path   => '/usr/local/sbin/mysqlbackup.sh',
    :ensure => 'present'
  )}

  it { should contain_file('mysqlbackupdir').with(
    :path   => '/tmp',
    :ensure => 'directory'
  )}

end
```

Add spec tests for backup compression enabled/disabled
user
```ruby
require 'spec_helper'

describe 'mysql::backup' do

  let(:default_params) {
    { 'backupuser'     => 'testuser',
      'backuppassword' => 'testpass',
      'backupdir'      => '/tmp',
    }
  }
  context "standard conditions" do
    let(:params) { default_params }

    it { should contain_database_user('testuser@localhost')}

    it { should contain_database_grant('testuser@localhost').with(
      :privileges => [ 'Select_priv', 'Reload_priv', 'Lock_tables_priv', 'Show_view_priv' ]
    )}

    it { should contain_cron('mysql-backup').with(
      :command => '/usr/local/sbin/mysqlbackup.sh',
      :ensure  => 'present'
    )}

    it { should contain_file('mysqlbackup.sh').with(
      :path   => '/usr/local/sbin/mysqlbackup.sh',
      :ensure => 'present'
    ) }

    it { should contain_file('mysqlbackupdir').with(
      :path   => '/tmp',
      :ensure => 'directory'
    )}

    it 'should have compression by default' do
      verify_contents(subject, 'mysqlbackup.sh', [
        ' --all-databases | bzcat -zc > ${DIR}/mysql_backup_`date +%Y%m%d-%H%M%S`.sql.bz2',
      ])
    end
  end

  context "with compression disabled" do
    let(:params) do
      { :backupcompress => false }.merge(default_params)
    end

    it { should contain_file('mysqlbackup.sh').with(
      :path   => '/usr/local/sbin/mysqlbackup.sh',
      :ensure => 'present'
    ) }

    it 'should be able to disable compression' do
      verify_contents(subject, 'mysqlbackup.sh', [
        ' --all-databases > ${DIR}/mysql_backup_`date +%Y%m%d-%H%M%S`.sql',
      ])
    end
  end
end
```
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