Allow comparing Bundler StubSpecs with RG specs

/ht @tony-spataro-rs

fixes #3762

2 files changed, 25 insertions, 2 deletions

diff --git a/lib/bundler/remote_specification.rb b/lib/bundler/remote_specification.rb
index c80eaa40fc..d8bd5c331f 100644
--- a/lib/bundler/remote_specification.rb
+++ b/lib/bundler/remote_specification.rb
@@ -8,6 +8,7 @@ module Bundler
   # full specification will only be fetched when necessary.
   class RemoteSpecification
     include MatchPlatform
+    include Comparable
 
     attr_reader :name, :version, :platform
     attr_accessor :source, :remote
@@ -33,17 +34,25 @@ module Bundler
       end
     end
 
+    def <=>(other)
+      if other.respond_to?(:full_name)
+        full_name <=> other.full_name
+      else
+        super
+      end
+    end
+
     # Because Rubyforge cannot be trusted to provide valid specifications
     # once the remote gem is downloaded, the backend specification will
     # be swapped out.
     def __swap__(spec)
-      @specification = spec
+      @_remote_specification = spec
     end
 
   private
 
     def _remote_specification
-      @specification ||= @spec_fetcher.fetch_spec([@name, @version, @platform])
+      @_remote_specification ||= @spec_fetcher.fetch_spec([@name, @version, @platform])
     end
 
     def method_missing(method, *args, &blk)
diff --git a/spec/bundler/remote_specification_spec.rb b/spec/bundler/remote_specification_spec.rb
new file mode 100644
index 0000000000..250c48c124
--- /dev/null
+++ b/spec/bundler/remote_specification_spec.rb
@@ -0,0 +1,14 @@
+require "spec_helper"
+
+describe Bundler::RemoteSpecification do
+  subject(:spec) { Bundler::RemoteSpecification.new("foo", "1.2", "ruby", fetcher) }
+  let(:fetcher) { double("SpecFetcher", :fetch_spec => rubygems_spec)}
+  let(:rubygems_spec) { Gem::Specification.new("foo", "1.2") }
+
+  describe "<=>" do
+    let(:other_spec) { Gem::Specification.new("bar", "1.0") }
+    it "sorts with Gem::Specification" do
+      expect(spec <=> other_spec).to eq(1)
+    end
+  end
+end
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