added user test, basic user methods

config/initializers/core_extensions.rb

@@ -0,0 +1,31 @@
+class ActiveRecord::Base
+  class << self    
+    public :sanitize_sql_array
+  end
+  
+  %w(execute select_value select_values select_all).each do |method_name|
+    define_method("#{method_name}_sql") do |sql, *params|
+      connection.__send__(method_name, self.class.sanitize_sql_array([sql, *params]))
+    end
+
+    self.class.__send__(:define_method, "#{method_name}_sql") do |sql, *params|
+      connection.__send__(method_name, sanitize_sql_array([sql, *params]))
+    end
+  end
+end
+
+class NilClass
+  def id
+    raise NoMethodError
+  end
+end
+
+class String
+  def to_escaped_for_sql_like
+    return self.gsub(/\\/, '\0\0').gsub(/%/, '\\%').gsub(/_/, '\\_').gsub(/\*/, '%')
+  end
+
+  def to_escaped_js
+    return self.gsub(/\\/, '\0\0').gsub(/['"]/) {|m| "\\#{m}"}.gsub(/\r\n|\r|\n/, '\\n')
+  end
+end