Fix failing test in spec/workers/post_receive_spec.rbsh-fix-ee-issue-8871

This is what was happening before:

1. `Project#set_timestamps_for_create` was called at creation time
and set the `last_activity_at` and `last_repository_updated_at`
to the current timestamp T.

2. The test ran `PostReceive#perform`, which then called
`PostReceive#process_wiki_changes`. If less than 500 milliseconds
elapsed since T, then the update would just set the timestamp to T.

To fix this problem, we can just use Timecop to ensure at least
one second has elapsed after attempting to process changes.

Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/8871

1 files changed, 11 insertions, 4 deletions

diff --git a/spec/workers/post_receive_spec.rb b/spec/workers/post_receive_spec.rb
index 9176eb12b12..caae46a3175 100644
--- a/spec/workers/post_receive_spec.rb
+++ b/spec/workers/post_receive_spec.rb
@@ -141,11 +141,18 @@ describe PostReceive do
     let(:gl_repository) { "wiki-#{project.id}" }
 
     it 'updates project activity' do
-      described_class.new.perform(gl_repository, key_id, base64_changes)
+      # Force Project#set_timestamps_for_create to initialize timestamps
+      project
 
-      expect { project.reload }
-        .to change(project, :last_activity_at)
-        .and change(project, :last_repository_updated_at)
+      # MySQL drops milliseconds in the timestamps, so advance at least
+      # a second to ensure we see changes.
+      Timecop.freeze(1.second.from_now) do
+        expect do
+          described_class.new.perform(gl_repository, key_id, base64_changes)
+          project.reload
+        end.to change(project, :last_activity_at)
+           .and change(project, :last_repository_updated_at)
+      end
     end
   end