Migration to add close-time to changesets. This replaces the boolean 'open' attribute. Added checks to ensure that the maximum lifetime and number of changes in a changeset are enforced. Added some tests.

test/fixtures/changesets.yml

@@ -7,33 +7,37 @@ normal_user_first_change:
   id: 1
   user_id: 1
   created_at: "2007-01-01 00:00:00"
-  open: true
+  closed_at: <%= DateTime.now + Rational(1,24) %>
   min_lon: <%= 1 * SCALE %>
   min_lat: <%= 1 * SCALE %>
   max_lon: <%= 5 * SCALE %>
   max_lat: <%= 5 * SCALE %>
+  num_changes: 11
   
 second_user_first_change:
   id: 2
   user_id: 2
   created_at: "2008-05-01 01:23:45"
-  open: true
+  closed_at: <%= DateTime.now + Rational(1,24) %>
+  num_changes: 0
 
 normal_user_closed_change:
   id: 3
   user_id: 1
   created_at: "2007-01-01 00:00:00"
-  open: false
+  closed_at: "2007-01-02 00:00:00"
+  num_changes: 0
 
 normal_user_version_change:
   id: 4
   user_id: 1
   created_at: "2008-01-01 00:00:00"
-  open: true
+  closed_at: <%= DateTime.now + Rational(1,24) %>
   min_lon: <%= 1 * SCALE %>
   min_lat: <%= 1 * SCALE %>
   max_lon: <%= 4 * SCALE %>
   max_lat: <%= 4 * SCALE %>
+  num_changes: 8
 
 # changeset to contain all the invalid stuff that is in the
 # fixtures (nodes outside the world, etc...), but needs to have
@@ -42,5 +46,5 @@ invalid_changeset:
   id: 5
   user_id: 3
   created_at: "2008-01-01 00:00:00"
-  open: false
-  
+  closed_at: "2008-01-02 00:00:00"
+  num_changes: 9