Add PaperTrail.gem_version

CHANGELOG.md

@@ -18,7 +18,7 @@ recommendations of [keepachangelog.com](http://keepachangelog.com/).
 
 ### Added
 
-- None
+- `PaperTrail.gem_version` returns a `Gem::Version`, nice for comparisons.
 
 ### Fixed
 

lib/paper_trail.rb

@@ -62,6 +62,13 @@ module PaperTrail
       !!paper_trail_store.fetch(:"enabled_for_#{model}", true)
     end
 
+    # Returns a `::Gem::Version`, convenient for comparisons. This is
+    # recommended over `::PaperTrail::VERSION::STRING`.
+    # @api public
+    def gem_version
+      ::Gem::Version.new(VERSION::STRING)
+    end
+
     # Set the field which records when a version was created.
     # @api public
     def timestamp_field=(_field_name)

lib/paper_trail/version_number.rb

@@ -1,5 +1,9 @@
 module PaperTrail
-  # :nodoc:
+  # The version number of the paper_trail gem. Not to be confused with
+  # `PaperTrail::Version`. Ruby constants are case-sensitive, apparently,
+  # and they are two different modules! It would be nice to remove `VERSION`,
+  # because of this confusion, but it's not worth the breaking change.
+  # People are encouraged to use `PaperTrail.gem_version` instead.
   module VERSION
     MAJOR = 6
     MINOR = 0

spec/modules/version_number_spec.rb

@@ -1,6 +1,7 @@
 require "spec_helper"
 
-RSpec.describe PaperTrail::VERSION do
+module PaperTrail
+  RSpec.describe VERSION do
     describe "STRING" do
       it "should join the numbers into a period separated string" do
         expect(described_class::STRING).to eq(
@@ -13,4 +14,5 @@ RSpec.describe PaperTrail::VERSION do
         )
       end
     end
+  end
 end

spec/paper_trail_spec.rb

@@ -1,6 +1,14 @@
 require "rails_helper"
 
 RSpec.describe PaperTrail do
+  describe ".gem_version" do
+    it "returns a Gem::Version" do
+      v = described_class.gem_version
+      expect(v).to be_a(::Gem::Version)
+      expect(v.to_s).to eq(::PaperTrail::VERSION::STRING)
+    end
+  end
+
   context "when enabled" do
     it "affects all threads" do
       Thread.new { described_class.enabled = false }.join