Makes user unwatch what he can no longer view after its permissions have changed (#3589).

A rake task (redmine:watchers:prune) is also added to prune existing watchers.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3167 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/member_test.rb

@@ -18,7 +18,7 @@
 require File.dirname(__FILE__) + '/../test_helper'
 
 class MemberTest < ActiveSupport::TestCase
-  fixtures :users, :projects, :roles, :members, :member_roles
+  fixtures :all
 
   def setup
     @jsmith = Member.find(1)
@@ -68,4 +68,70 @@ class MemberTest < ActiveSupport::TestCase
     
     assert_raise(ActiveRecord::RecordNotFound) { Member.find(@jsmith.id) }
   end
+  
+  context "removing permissions" do
+    setup do
+      Watcher.delete_all("user_id = 9")
+      user = User.find(9)
+      # public
+      Watcher.create!(:watchable => Issue.find(1), :user_id => user)
+      # private
+      Watcher.create!(:watchable => Issue.find(4), :user => user)
+      Watcher.create!(:watchable => Message.find(7), :user => user)
+      Watcher.create!(:watchable => Wiki.find(2), :user => user)
+      Watcher.create!(:watchable => WikiPage.find(3), :user => user)
+    end
+    
+    context "of user" do
+      setup do
+        @member = Member.create!(:project => Project.find(2), :principal => User.find(9), :role_ids => [1, 2])
+      end
+      
+      context "by deleting membership" do
+        should "prune watchers" do
+          assert_difference 'Watcher.count', -4 do
+            @member.destroy
+          end
+        end
+      end
+      
+      context "by updating roles" do
+        should "prune watchers" do
+          Role.find(2).remove_permission! :view_wiki_pages
+          member = Member.first(:order => 'id desc')
+          assert_difference 'Watcher.count', -2 do
+            member.role_ids = [2]
+            member.save
+          end
+          assert !Message.find(7).watched_by?(@user)
+        end
+      end
+    end
+    
+    context "of group" do
+      setup do
+        group = Group.find(10)
+        @member = Member.create!(:project => Project.find(2), :principal => group, :role_ids => [1, 2])
+        group.users << User.find(9)
+      end
+
+      context "by deleting membership" do
+        should "prune watchers" do
+          assert_difference 'Watcher.count', -4 do
+            @member.destroy
+          end
+        end
+      end  
+
+      context "by updating roles" do
+        should "prune watchers" do
+          Role.find(2).remove_permission! :view_wiki_pages
+          assert_difference 'Watcher.count', -2 do
+            @member.role_ids = [2]
+            @member.save
+          end
+        end
+      end
+    end
+  end
 end