lib/much-not-given.rb in much-not-given-0.0.1 vs lib/much-not-given.rb in much-not-given-0.1.0

@@ -1,4 +1,51 @@
 require "much-not-given/version"
+require "much-plugin"
 
 module MuchNotGiven
+  include MuchPlugin
+
+  plugin_class_methods do
+    def not_given
+      @not_given ||=
+        begin
+          Class.new {
+            def initialize(receiver_name)
+              @receiver_name = receiver_name
+            end
+
+            def blank?
+              true
+            end
+
+            def present?
+              false
+            end
+
+            def to_s
+              "#{@receiver_name}.not_given"
+            end
+
+            def inspect
+              to_s
+            end
+
+            def ==(other)
+              if other.is_a?(self.class)
+                true
+              else
+                super
+              end
+            end
+          }.new(self.inspect)
+        end
+    end
+
+    def not_given?(value)
+      value == not_given
+    end
+
+    def given?(value)
+      value != not_given
+    end
+  end
 end