Move the two exactly duplicated methods into a module.

lib/cookie_extractor.rb

@@ -1,4 +1,5 @@
 require "cookie_extractor/version"
+require "cookie_extractor/common"
 require "cookie_extractor/firefox_cookie_extractor"
 require "cookie_extractor/chrome_cookie_extractor"
 

lib/cookie_extractor/chrome_cookie_extractor.rb

@@ -2,6 +2,7 @@ require 'sqlite3'
 
 module CookieExtractor
   class ChromeCookieExtractor
+    include Common
 
     def initialize(cookie_file)
       @cookie_file = cookie_file
@@ -23,21 +24,5 @@ module CookieExtractor
       end
       @result
     end
-
-    private
-
-    def is_domain_wide(hostname)
-      hostname[0..0] == "."
-    end
-
-    def true_false_word(value)
-      if value == "1" || value == 1 || value == true
-        "TRUE"
-      elsif value == "0" || value == 0 || value == false
-        "FALSE"
-      else
-        raise "Invalid value passed to true_false_word: #{value.inspect}"
-      end
-    end
   end
 end

lib/cookie_extractor/common.rb

@@ -0,0 +1,19 @@
+module CookieExtractor
+  module Common
+    private
+
+    def is_domain_wide(hostname)
+      hostname[0..0] == "."
+    end
+
+    def true_false_word(value)
+      if value == "1" || value == 1 || value == true
+        "TRUE"
+      elsif value == "0" || value == 0 || value == false
+        "FALSE"
+      else
+        raise "Invalid value passed to true_false_word: #{value.inspect}"
+      end
+    end
+  end
+end

lib/cookie_extractor/firefox_cookie_extractor.rb

@@ -2,6 +2,7 @@ require 'sqlite3'
 
 module CookieExtractor
   class FirefoxCookieExtractor
+    include Common
 
     def initialize(cookie_file)
       @cookie_file = cookie_file
@@ -23,21 +24,5 @@ module CookieExtractor
       end
       @result
     end
-
-    private
-
-    def is_domain_wide(hostname)
-      hostname[0..0] == "."
-    end
-
-    def true_false_word(value)
-      if value == "1" || value == 1 || value == true
-        "TRUE"
-      elsif value == "0" || value == 0 || value == false
-        "FALSE"
-      else
-        raise "Invalid value passed to true_false_word: #{value.inspect}"
-      end
-    end
   end
 end