Add YARD docs to Faker::Phone_Number (#2007)

lib/faker/default/phone_number.rb

@@ -3,47 +3,126 @@
 module Faker
   class PhoneNumber < Base
     class << self
+      ##
+      # Produces a random phone number in a random format (may or may not have a country code, extension and can have different dividers).
+      #
+      # @return [String]
+      #
+      # @example
+      #   Faker::PhoneNumber.phone_number #=> "397.693.1309 x4321"
+      #
+      # @faker.version 0.3.0
       def phone_number
         parse('phone_number.formats')
       end
 
+      ##
+      # Produces a random cell phone number in a random format (may or may not have a country code and can have different dividers).
+      #
+      # @return [String]
+      #
+      # @example
+      #   Faker::PhoneNumber.cell_phone #=> "(186)285-7925"
+      #
+      # @faker.version 1.0.0
       def cell_phone
         parse('cell_phone.formats')
       end
 
+      ##
+      # Produces a random country code.
+      #
+      # @return [String]
+      #
+      # @example
+      #   Faker::PhoneNumber.country_code #=> "+20"
+      #
+      # @faker.version 1.9.2
       def country_code
         "+#{fetch('country_code')}"
       end
 
+      ##
+      # Produces a random phone number with country code.
+      #
+      # @return [String]
+      #
+      # @example
+      #   Faker::PhoneNumber.phone_number_with_country_code #=> "+95 1-672-173-8153"
+      #
+      # @faker.version 1.9.2
       def phone_number_with_country_code
         "#{country_code} #{phone_number}"
       end
 
+      ##
+      # Produces a random cell phone number with country code.
+      #
+      # @return [String]
+      #
+      # @example
+      #   Faker::PhoneNumber.cell_phone_with_country_code #=> "+974 (190) 987-9034"
+      #
+      # @faker.version 1.9.2
       def cell_phone_with_country_code
         "#{country_code} #{cell_phone}"
       end
 
+      ##
+      # Produces a random phone number in e164 format.
+      #
+      # @return [String]
+      #
+      # @example
+      #   Faker::PhoneNumber.cell_phone_in_e164 #=> "+944937040625"
+      #
+      # @faker.version 1.9.2
       def cell_phone_in_e164
         cell_phone_with_country_code.delete('^+0-9')
       end
 
-      # US and Canada only
+      ##
+      # Produces a random US or Canada-based area code.
+      #
+      # @return [String]
+      #
+      # @example
+      #   Faker::PhoneNumber.area_code #=> "201"
+      #
+      # @faker.version 1.3.0
       def area_code
         fetch('phone_number.area_code')
       rescue I18n::MissingTranslationData
         nil
       end
 
-      # US and Canada only
+      ##
+      # Produces a random US or Canada-based exchange code.
+      #
+      # @return [String]
+      #
+      # @example
+      #   Faker::PhoneNumber.exchange_code #=> "208"
+      #
+      # @faker.version 1.3.0
       def exchange_code
         fetch('phone_number.exchange_code')
       rescue I18n::MissingTranslationData
         nil
       end
 
-      # US and Canada only
-      # Can be used for both extensions and last four digits of phone number.
-      # Since extensions can be of variable length, this method taks a length parameter
+      ##
+      # Produces a random US or Canada-based extension / subscriber number. Can be used for both extensions and last four digits of phone number.
+      #
+      # @param length [Integer] Speficies the length of the return value.
+      # @return [String]
+      #
+      # @example
+      #   Faker::PhoneNumber.subscriber_number #=> "3873"
+      #   Faker::PhoneNumber.subscriber_number(length: 2) #=> "39"
+      #   Faker::PhoneNumber.extension #=> "3764"
+      #
+      # @faker.version 1.3.0
       def subscriber_number(legacy_length = NOT_GIVEN, length: 4)
         warn_for_deprecated_arguments do |keywords|
           keywords << :length if legacy_length != NOT_GIVEN