1 files changed, 44 insertions, 0 deletions
diff --git a/spec/migrations/backfill_draft_status_on_merge_requests_spec.rb b/spec/migrations/backfill_draft_status_on_merge_requests_spec.rb
new file mode 100644
index 00000000000..2015f947f15
--- /dev/null
+++ b/spec/migrations/backfill_draft_status_on_merge_requests_spec.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require Rails.root.join('db', 'post_migrate', '20210526222715_backfill_draft_status_on_merge_requests.rb')
+
+RSpec.describe BackfillDraftStatusOnMergeRequests, :migration do
+  let(:namespaces)     { table(:namespaces) }
+  let(:projects)       { table(:projects) }
+  let(:merge_requests) { table(:merge_requests) }
+
+  let(:group)   { namespaces.create!(name: 'gitlab', path: 'gitlab') }
+  let(:project) { projects.create!(namespace_id: group.id) }
+
+  let(:draft_prefixes) { ["[Draft]", "(Draft)", "Draft:", "Draft", "[WIP]", "WIP:", "WIP"] }
+
+  def create_merge_request(params)
+    common_params = {
+      target_project_id: project.id,
+      target_branch: 'feature1',
+      source_branch: 'master'
+    }
+
+    merge_requests.create!(common_params.merge(params))
+  end
+
+  context "for MRs with #draft? == true titles but draft attribute false" do
+    before do
+      draft_prefixes.each do |prefix|
+        (1..4).each do |n|
+          merge_request = create_merge_request(title: "#{prefix} This is a title", state_id: n)
+          merge_request.update_columns(draft: false)
+        end
+      end
+    end
+
+    it "updates all open draft merge request's draft field to true" do
+      mr_count = merge_requests.all.count
+
+      expect { disable_migrations_output { migrate! } }
+        .to change { MergeRequest.where(draft: false).count }
+        .from(mr_count).to(mr_count - draft_prefixes.length)
+    end
+  end
+end