Added basic tests for enforcers.

test/test_enforcers.rb

@@ -0,0 +1,32 @@
+require 'helper'
+
+class EnforcersTest < Test::Unit::TestCase
+  context "Including Canable::Enforcers in a class" do
+    setup do
+      klass = Class.new do
+        include Canable::Enforcers
+        attr_accessor :current_user, :article
+
+        def show
+          enforce_view_permission(article)
+        end
+      end
+
+      @article                 = mock('article')
+      @user                    = mock('user')
+      @controller              = klass.new
+      @controller.article      = @article
+      @controller.current_user = @user
+    end
+
+    should "not raise error if can" do
+      @user.expects(:can_view?).with(@article).returns(true)
+      assert_nothing_raised { @controller.show }
+    end
+
+    should "raise error if cannot" do
+      @user.expects(:can_view?).with(@article).returns(false)
+      assert_raises(Canable::Transgression) { @controller.show }
+    end
+  end
+end