Create a todo on failing MR build

When a build fails for a commit, create a todo for the author of the
merge request that commit is the HEAD of. If the commit isn't the HEAD
commit of any MR, don't do anything. If there already is a todo for that
user and MR, don't do anything.

Current limitations:
- This isn't configurable by project.
- The author of a merge request might not be the person who pushed the
  breaking commit.

1 files changed, 4 insertions, 0 deletions

diff --git a/spec/factories/todos.rb b/spec/factories/todos.rb
index e3681ae93a5..f426e27afed 100644
--- a/spec/factories/todos.rb
+++ b/spec/factories/todos.rb
@@ -18,5 +18,9 @@ FactoryGirl.define do
       commit_id RepoHelpers.sample_commit.id
       target_type "Commit"
     end
+
+    trait :build_failed do
+      action { Todo::BUILD_FAILED }
+    end
   end
 end