Fix suggested squashed messages for MR

app/serializers/merge_request_poll_cached_widget_entity.rb

@@ -15,7 +15,7 @@ class MergeRequestPollCachedWidgetEntity < IssuableEntity
   expose :target_project_id
   expose :squash
   expose :rebase_in_progress?, as: :rebase_in_progress
-  expose :default_squash_commit_message, if: -> (merge_request, _) { merge_request.mergeable? }
+  expose :default_squash_commit_message
   expose :commits_count
   expose :merge_ongoing?, as: :merge_ongoing
   expose :work_in_progress?, as: :work_in_progress
@@ -25,10 +25,10 @@ class MergeRequestPollCachedWidgetEntity < IssuableEntity
   expose :source_branch_exists?, as: :source_branch_exists
   expose :branch_missing?, as: :branch_missing
 
-  expose :commits_without_merge_commits, using: MergeRequestWidgetCommitEntity,
-    if: -> (merge_request, _) { merge_request.mergeable? } do |merge_request|
+  expose :commits_without_merge_commits, using: MergeRequestWidgetCommitEntity do |merge_request|
     merge_request.recent_commits.without_merge_commits
   end
+
   expose :diff_head_sha do |merge_request|
     merge_request.diff_head_sha.presence
   end

changelogs/unreleased/id-fix-squash-messages.yml

+---
+title: Fix suggested squashed messages for MR
+merge_request: 43508
+author:
+type: fixed

spec/serializers/merge_request_poll_cached_widget_entity_spec.rb

@@ -3,12 +3,11 @@
 require 'spec_helper'
 
 RSpec.describe MergeRequestPollCachedWidgetEntity do
-  include ProjectForksHelper
   using RSpec::Parameterized::TableSyntax
 
-  let(:project)  { create :project, :repository }
-  let(:resource) { create(:merge_request, source_project: project, target_project: project) }
-  let(:user)     { create(:user) }
+  let_it_be(:project, refind: true)  { create :project, :repository }
+  let_it_be(:resource, refind: true) { create(:merge_request, source_project: project, target_project: project) }
+  let_it_be(:user)     { create(:user) }
 
   let(:request) { double('request', current_user: user, project: project) }
 
@@ -174,8 +173,6 @@ RSpec.describe MergeRequestPollCachedWidgetEntity do
     end
 
     context 'when auto merge is not enabled' do
-      let(:resource) { create(:merge_request) }
-
       it 'returns auto merge related information' do
         expect(subject[:auto_merge_enabled]).to be_falsy
       end
@@ -215,16 +212,5 @@ RSpec.describe MergeRequestPollCachedWidgetEntity do
         expect(subject[:commits_without_merge_commits].size).to eq(12)
       end
     end
-
-    context 'when merge request is not mergeable' do
-      before do
-        allow(resource).to receive(:mergeable?).and_return(false)
-      end
-
-      it 'does not have default_squash_commit_message and commits_without_merge_commits' do
-        expect(subject[:default_squash_commit_message]).to eq(nil)
-        expect(subject[:commits_without_merge_commits]).to eq(nil)
-      end
-    end
   end
 end