From 51de9966499e9cf67647837411f188f3bdae21c5 Mon Sep 17 00:00:00 2001
From: Ben Atkins <batkinz@gmail.com>
Date: Wed, 11 Jun 2014 14:55:04 -0400
Subject: [PATCH] Expand VERSION (number) into it's own module to give the
 version number tracking more modularity

---
 CHANGELOG.md                        |  1 +
 lib/paper_trail/version_number.rb   | 17 ++++++++++-
 paper_trail.gemspec                 |  2 +-
 spec/modules/version_number_spec.rb | 44 +++++++++++++++++++++++++++++
 4 files changed, 62 insertions(+), 2 deletions(-)
 create mode 100644 spec/modules/version_number_spec.rb

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d8b08d66..e8968b0f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
   - [#372](https://github.com/airblade/paper_trail/pull/372) - Use [Arel](https://github.com/rails/arel) for SQL construction.
   - [#347](https://github.com/airblade/paper_trail/pull/347) - Autoload `ActiveRecord` models in via a `Rails::Engine` when
     the gem is used with `Rails`.
+  - Expand `PaperTrail::VERSION` into a module, mimicking the form used by Rails to give it some additional modularity & versatility.
   - Fixed `VersionConcern#index` instance method so that it conforms to using the primary key for ordering when possible.
 
 ## 3.0.2
diff --git a/lib/paper_trail/version_number.rb b/lib/paper_trail/version_number.rb
index 8acac776..99b737f0 100644
--- a/lib/paper_trail/version_number.rb
+++ b/lib/paper_trail/version_number.rb
@@ -1,3 +1,18 @@
 module PaperTrail
-  VERSION = '3.0.2'
+  module VERSION
+    MAJOR = 3
+    MINOR = 0
+    TINY  = 3
+    PRE   = 'alpha'
+
+    STRING = [MAJOR, MINOR, TINY, PRE].compact.join('.')
+
+    def self.to_s
+      STRING
+    end
+  end
+
+  def self.version
+    VERSION::STRING
+  end
 end
diff --git a/paper_trail.gemspec b/paper_trail.gemspec
index bdcbd747..0730052e 100644
--- a/paper_trail.gemspec
+++ b/paper_trail.gemspec
@@ -3,7 +3,7 @@ require 'paper_trail/version_number'
 
 Gem::Specification.new do |s|
   s.name          = 'paper_trail'
-  s.version       = PaperTrail::VERSION
+  s.version       = PaperTrail.version
   s.platform      = Gem::Platform::RUBY
   s.summary       = "Track changes to your models' data. Good for auditing or versioning."
   s.description   = s.summary
diff --git a/spec/modules/version_number_spec.rb b/spec/modules/version_number_spec.rb
new file mode 100644
index 00000000..aaa38629
--- /dev/null
+++ b/spec/modules/version_number_spec.rb
@@ -0,0 +1,44 @@
+require 'spec_helper'
+
+describe 'PaperTrail::VERSION' do
+
+  describe "Constants" do
+    subject { PaperTrail::VERSION }
+
+    describe :MAJOR do
+      it { should be_const_defined(:MAJOR) }
+      it { subject::MAJOR.should be_a(Integer) }
+    end
+    describe :MINOR do
+      it { should be_const_defined(:MINOR) }
+      it { subject::MINOR.should be_a(Integer) }
+    end
+    describe :TINY do
+      it { should be_const_defined(:TINY) }
+      it { subject::TINY.should be_a(Integer) }
+    end
+    describe :PRE do
+      it { should be_const_defined(:PRE) }
+      if PaperTrail::VERSION::PRE
+        it { subject::PRE.should be_instance_of(String) }
+      end
+    end
+    describe :STRING do
+      it { should be_const_defined(:STRING) }
+      it { subject::STRING.should be_instance_of(String) }
+
+      it "should join the numbers into a period separated string" do
+        subject::STRING.should ==
+          [subject::MAJOR, subject::MINOR, subject::TINY, subject::PRE].compact.join('.')
+      end
+    end
+  end
+
+end
+
+describe PaperTrail do
+  describe :version do
+    it { should respond_to(:version) }
+    its(:version) { should == PaperTrail::VERSION::STRING }
+  end
+end