```ruby
windows_feature 'install SNMP' do
  feature_name 'SNMP'
end

windows_feature 'remove SNMP' do
  feature_name ['SNMP']
  action :remove
end

windows_feature 'Install SNMP again' do
  feature_name node['platform_version'].to_f < 6.2 ? 'SNMP' : 'snmp' # lowercase on purpose
end

windows_feature_dism %w(TelnetClient TFTP)

# Powershell in windows 2008r2 is old and awful. users need to upgrade
unless node['platform_version'].to_f < 6.2
  # This is for appveyor, which already seems to have FTP installed
  # which causes a short circuit of the "all" behavior and-breaks the test.
  # TODO: Make :windows_feature_powershell look at all the sub-features and validate
  # that they are installed when "all is specified"
  windows_feature 'Remove FTP for Appveyor' do
    feature_name 'Web-Ftp-Server'
    action :remove
    install_method :windows_feature_powershell
  end

  windows_feature 'web-ftp-server' do # lowercase on purpose
    all true
    install_method :windows_feature_powershell
  end

  windows_feature_powershell ['Web-Asp-Net45', 'Web-Net-Ext45']

  windows_feature ['NPAS'] do
    management_tools true
    install_method :windows_feature_powershell
  end
end
```

Clarify why we're testing some of these things
user
```ruby
# pass feature name as a string
windows_feature 'install SNMP' do
  feature_name 'SNMP'
end

# pass feature name as an array
windows_feature 'remove SNMP' do
  feature_name ['SNMP']
  action :remove
end

# pass feature name as a lowercase value on 2012+
windows_feature 'Install SNMP again' do
  feature_name node['platform_version'].to_f < 6.2 ? 'SNMP' : 'snmp' # lowercase on purpose
end

# array of feature names
windows_feature_dism %w(TelnetClient TFTP)

# Powershell in windows 2008r2 is old and awful. users need to upgrade
unless node['platform_version'].to_f < 6.2
  # This is for appveyor, which already seems to have FTP installed
  # which causes a short circuit of the "all" behavior and-breaks the test.
  # TODO: Make :windows_feature_powershell look at all the sub-features and validate
  # that they are installed when "all is specified"
  windows_feature 'Remove FTP for Appveyor' do
    feature_name 'Web-Ftp-Server'
    action :remove
    install_method :windows_feature_powershell
  end

  windows_feature 'web-ftp-server' do # lowercase on purpose
    all true
    install_method :windows_feature_powershell
  end

  windows_feature_powershell ['Web-Asp-Net45', 'Web-Net-Ext45']

  windows_feature ['NPAS'] do
    management_tools true
    install_method :windows_feature_powershell
  end
end
```
assistant