Merge branch 'show-all-pipelines-from-all-diffs' into 'master'

Show all pipelines from all merge_request_diffs

This way we could also show pipelines from commits which
were discarded due to a force push.

Closes #21889

See merge request !6414

1 files changed, 53 insertions, 6 deletions

diff --git a/spec/models/merge_request_spec.rb b/spec/models/merge_request_spec.rb
index 06feeb1bbba..38c2a28d3e1 100644
--- a/spec/models/merge_request_spec.rb
+++ b/spec/models/merge_request_spec.rb
@@ -495,15 +495,62 @@ describe MergeRequest, models: true do
   end
 
   describe '#all_pipelines' do
-    let!(:pipelines) do
-      subject.merge_request_diff.commits.map do |commit|
-        create(:ci_empty_pipeline, project: subject.source_project, sha: commit.id, ref: subject.source_branch)
+    shared_examples 'returning pipelines with proper ordering' do
+      let!(:all_pipelines) do
+        subject.all_commits_sha.map do |sha|
+          create(:ci_empty_pipeline,
+                 project: subject.source_project,
+                 sha: sha,
+                 ref: subject.source_branch)
+        end
+      end
+
+      it 'returns all pipelines' do
+        expect(subject.all_pipelines).not_to be_empty
+        expect(subject.all_pipelines).to eq(all_pipelines.reverse)
+      end
+    end
+
+    context 'with single merge_request_diffs' do
+      it_behaves_like 'returning pipelines with proper ordering'
+    end
+
+    context 'with multiple irrelevant merge_request_diffs' do
+      before do
+        subject.update(target_branch: 'markdown')
+      end
+
+      it_behaves_like 'returning pipelines with proper ordering'
+    end
+
+    context 'with unsaved merge request' do
+      subject { build(:merge_request) }
+
+      let!(:pipeline) do
+        create(:ci_empty_pipeline,
+               project: subject.project,
+               sha: subject.diff_head_sha,
+               ref: subject.source_branch)
       end
+
+      it 'returns pipelines from diff_head_sha' do
+        expect(subject.all_pipelines).to contain_exactly(pipeline)
+      end
+    end
+  end
+
+  describe '#all_commits_sha' do
+    let(:all_commits_sha) do
+      subject.merge_request_diffs.flat_map(&:commits).map(&:sha).uniq
+    end
+
+    before do
+      subject.update(target_branch: 'markdown')
     end
 
-    it 'returns a pipelines from source projects with proper ordering' do
-      expect(subject.all_pipelines).not_to be_empty
-      expect(subject.all_pipelines).to eq(pipelines.reverse)
+    it 'returns all SHA from all merge_request_diffs' do
+      expect(subject.merge_request_diffs.size).to eq(2)
+      expect(subject.all_commits_sha).to eq(all_commits_sha)
     end
   end