Added src directory

src/about_scope.rb

@@ -0,0 +1,79 @@
+require 'edgecase'
+
+class AboutScope < EdgeCase::Koan
+  module Jims
+    class Dog
+      def identify
+        :jims_dog
+      end
+    end
+  end
+
+  module Joes
+    class Dog
+      def identify
+        :joes_dog
+      end
+    end
+  end
+
+  def test_dog_is_not_available_in_the_current_scope
+    assert_raise(___(NameError)) do
+      fido = Dog.new
+    end
+  end
+
+  def test_you_can_reference_nested_classes_using_the_scope_operator
+    fido = Jims::Dog.new
+    rover = Joes::Dog.new
+    assert_equal __(:jims_dog), fido.identify
+    assert_equal __(:joes_dog), rover.identify
+    
+    assert_not_equal fido.class, rover.class
+    assert_not_equal Jims::Dog, Joes::Dog
+  end
+
+  # ------------------------------------------------------------------
+
+  class String
+  end
+
+  def test_bare_bones_class_names_assume_the_current_scope
+    assert_equal __(true), AboutScope::String == String
+  end
+  
+  def test_nested_string_is_not_the_same_as_the_system_string
+    assert_equal __(false), String == "HI".class
+  end
+
+  def test_use_the_prefix_scope_operator_to_force_the_global_scope
+    assert_equal __(true), ::String == "HI".class
+  end
+
+  # ------------------------------------------------------------------
+
+  PI = 3.1416
+
+  def test_constants_are_defined_with_an_initial_uppercase_letter
+    assert_equal __(3.1416), PI
+  end
+
+  # ------------------------------------------------------------------
+
+  MyString = ::String
+
+  def test_class_names_are_just_constants
+    assert_equal __(true), MyString == ::String
+    assert_equal __(true), MyString == "HI".class
+  end
+
+  def test_constants_can_be_looked_up_explicitly
+    assert_equal __(true), PI == AboutScope.const_get("PI")
+    assert_equal __(true), MyString == AboutScope.const_get("MyString")
+  end
+
+  def test_you_can_get_a_list_of_constants_for_any_class_or_module
+    assert_equal __(["Dog"]), Jims.constants
+    assert_equal __(121), Object.constants.size
+  end
+end