Updated description of AllowMassAssignmentMatcher.

gemfiles/3.0.gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: /Users/draper/Dropbox/Development/shoulda-matchers
   specs:
-    shoulda-matchers (1.3.0)
+    shoulda-matchers (1.4.0)
       activesupport (>= 3.0.0)
 
 GEM

gemfiles/3.1.gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: /Users/draper/Dropbox/Development/shoulda-matchers
   specs:
-    shoulda-matchers (1.3.0)
+    shoulda-matchers (1.4.0)
       activesupport (>= 3.0.0)
 
 GEM

gemfiles/3.2.gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: /Users/draper/Dropbox/Development/shoulda-matchers
   specs:
-    shoulda-matchers (1.3.0)
+    shoulda-matchers (1.4.0)
       activesupport (>= 3.0.0)
 
 GEM

lib/shoulda/matchers/active_model/allow_mass_assignment_of_matcher.rb

@@ -57,11 +57,21 @@ module Shoulda # :nodoc:
         end
 
         def description
-          "allow mass assignment of #{@attribute}"
+          [base_description, role_description].compact.join(" ")
         end
 
         private
 
+        def base_description
+          "allow mass assignment of #{@attribute}"
+        end
+
+        def role_description
+          if role != :default
+            "as #{role}"
+          end
+        end
+
         def role
           @options[:role] || :default
         end

spec/shoulda/active_model/allow_mass_assignment_of_matcher_spec.rb

@@ -1,6 +1,24 @@
 require 'spec_helper'
 
 describe Shoulda::Matchers::ActiveModel::AllowMassAssignmentOfMatcher do
+  describe "#description" do
+    context 'without a role' do
+      it 'includes the attribute name' do
+        matcher = Shoulda::Matchers::ActiveModel::AllowMassAssignmentOfMatcher.new(:attr)
+        matcher.description.should eq("allow mass assignment of attr")
+      end
+    end
+
+    if active_model_3_1?
+      context 'with a role' do
+        it 'includes the attribute name and the role' do
+          matcher = Shoulda::Matchers::ActiveModel::AllowMassAssignmentOfMatcher.new(:attr).as(:admin)
+          matcher.description.should eq("allow mass assignment of attr as admin")
+        end
+      end
+    end
+  end
+
   context "an attribute that is blacklisted from mass-assignment" do
     let(:model) do
       define_model(:example, :attr => :string) do