Merge pull request #4 from kitaro-tn/dev

added as namespace module

README.md

@@ -6,7 +6,6 @@
 
 Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/as_namespace`. To experiment with that code, run `bin/console` for an interactive prompt.
 
-TODO: Delete this and the text above, and describe your gem
 
 ## Installation
 
@@ -26,7 +25,18 @@ Or install it yourself as:
 
 ## Usage
 
-TODO: Write usage instructions here
+```ruby
+require 'as_namespace'
+
+class TestClass
+
+  include AsNamespace
+
+  as_namespace module_obj: Parent::Child::Grandson, alias_val: :grand
+  as_namespace module_obj: Parent::Child, alias_val: :CHILD
+
+end
+```
 
 ## Development
 

as_namespace.gemspec

@@ -14,14 +14,6 @@ Gem::Specification.new do |spec|
   spec.homepage      = "https://github.com/kitaro-tn/as_namespace"
   spec.license       = "MIT"
 
-  # Prevent pushing this gem to RubyGems.org by setting 'allowed_push_host', or
-  # delete this section to allow pushing this gem to any host.
-  if spec.respond_to?(:metadata)
-    spec.metadata['allowed_push_host'] = "TODO: Set to 'http://mygemserver.com'"
-  else
-    raise "RubyGems 2.0 or newer is required to protect against public gem pushes."
-  end
-
   spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   spec.bindir        = "exe"
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }

lib/as_namespace.rb

@@ -1,5 +1,30 @@
 require "as_namespace/version"
 
 module AsNamespace
-  # Your code goes here...
+
+  def self.included(base)
+    base.extend(ClassMethod)
+  end
+
+  module ClassMethod
+
+    ##
+    # @param [Module] module_obj
+    # @param [Object] alias_val
+    def as_namespace(module_obj:, alias_val:)
+      @module_obj = module_obj
+      @alias_val = alias_val
+      if (alias_val =~ /^[[:upper:]]/).nil?
+        self.class_eval <<-EOS, __FILE__, __LINE__ + 1
+          def #{alias_val}
+            #{module_obj}
+          end
+        EOS
+      else
+        self.const_set(alias_val, module_obj)
+      end
+    end
+
+  end
+
 end

spec/as_namespace_spec.rb

@@ -1,7 +1,16 @@
 require 'spec_helper'
+require 'support/sample_namespace'
 
 describe AsNamespace do
   it 'has a version number' do
     expect(AsNamespace::VERSION).not_to be nil
   end
+
+  it 'is abbreviated name' do
+    test_class = TestClass
+    expect(test_class.instance_methods(false)).to include(:grand)
+    expect(test_class.const_defined?(:CHILD)).to be true
+    expect(test_class.new.grandson).to eq("Grandson")
+    expect(test_class.new.child).to eq("Child")
+  end
 end

spec/support/sample_namespace.rb

@@ -0,0 +1,39 @@
+# coding: utf-8
+
+require 'as_namespace'
+
+module Parent
+
+  module Child
+
+    def self.myself
+      "Child"
+    end
+
+    module Grandson
+
+      def self.myself
+        "Grandson"
+      end
+
+    end
+
+  end
+
+end
+
+class TestClass
+
+  include AsNamespace
+
+  as_namespace module_obj: Parent::Child::Grandson, alias_val: :grand
+  as_namespace module_obj: Parent::Child, alias_val: :CHILD
+
+  attr_reader :grandson, :child
+
+  def initialize
+    @grandson = grand.myself
+    @child = CHILD.myself
+  end
+
+end