1 files changed, 26 insertions, 0 deletions
diff --git a/spec/migrations/remove_duplicate_mr_events_spec.rb b/spec/migrations/remove_duplicate_mr_events_spec.rb
new file mode 100644
index 00000000000..e393374028f
--- /dev/null
+++ b/spec/migrations/remove_duplicate_mr_events_spec.rb
@@ -0,0 +1,26 @@
+require 'spec_helper'
+require Rails.root.join('db', 'post_migrate', '20170815060945_remove_duplicate_mr_events.rb')
+
+describe RemoveDuplicateMrEvents, truncate: true do
+  let(:migration) { described_class.new }
+
+  describe '#up' do
+    let(:user) { create(:user) }
+    let(:merge_requests) { create_list(:merge_request, 2) }
+    let(:issue) { create(:issue) }
+    let!(:events) do
+      [
+        create(:event, :created, author: user, target: merge_requests.first),
+        create(:event, :created, author: user, target: merge_requests.first),
+        create(:event, :updated, author: user, target: merge_requests.first),
+        create(:event, :created, author: user, target: merge_requests.second),
+        create(:event, :created, author: user, target: issue),
+        create(:event, :created, author: user, target: issue)
+      ]
+    end
+
+    it 'removes duplicated merge request create records' do
+      expect { migration.up }.to change { Event.count }.from(6).to(5)
+    end
+  end
+end