1 files changed, 109 insertions, 0 deletions
diff --git a/spec/support/shared_examples/models/label_note_shared_examples.rb b/spec/support/shared_examples/models/label_note_shared_examples.rb
new file mode 100644
index 00000000000..406385c13bd
--- /dev/null
+++ b/spec/support/shared_examples/models/label_note_shared_examples.rb
@@ -0,0 +1,109 @@
+# frozen_string_literal: true
+
+shared_examples 'label note created from events' do
+  def create_event(params = {})
+    event_params = { action: :add, label: label, user: user }
+    resource_key = resource.class.name.underscore.to_s
+    event_params[resource_key] = resource
+
+    build(:resource_label_event, event_params.merge(params))
+  end
+
+  def label_refs(events)
+    labels = events.map(&:label).compact
+
+    labels.map { |l| l.to_reference}.sort.join(' ')
+  end
+
+  let(:time) { Time.now }
+  let(:local_label_ids) { [label.id, label2.id] }
+
+  describe '.from_events' do
+    it 'returns system note with expected attributes' do
+      event = create_event
+
+      note = described_class.from_events([event, create_event])
+
+      expect(note.system).to be true
+      expect(note.author_id).to eq event.user_id
+      expect(note.discussion_id).to eq event.discussion_id
+      expect(note.noteable).to eq event.issuable
+      expect(note.note).to be_present
+      expect(note.note_html).to be_present
+    end
+
+    it 'updates markdown cache if reference is not set yet' do
+      event = create_event(reference: nil)
+
+      described_class.from_events([event])
+
+      expect(event.reference).not_to be_nil
+    end
+
+    it 'updates markdown cache if label was deleted' do
+      event = create_event(reference: 'some_ref', label: nil)
+
+      described_class.from_events([event])
+
+      expect(event.reference).to eq ''
+    end
+
+    it 'returns html note' do
+      events = [create_event(created_at: time)]
+
+      note = described_class.from_events(events)
+
+      expect(note.note_html).to include label.title
+    end
+
+    it 'returns text note for added labels' do
+      events = [create_event(created_at: time),
+                create_event(created_at: time, label: label2),
+                create_event(created_at: time, label: nil)]
+
+      note = described_class.from_events(events)
+
+      expect(note.note).to eq "added #{label_refs(events)} + 1 deleted label"
+    end
+
+    it 'returns text note for removed labels' do
+      events = [create_event(action: :remove, created_at: time),
+                create_event(action: :remove, created_at: time, label: label2),
+                create_event(action: :remove, created_at: time, label: nil)]
+
+      note = described_class.from_events(events)
+
+      expect(note.note).to eq "removed #{label_refs(events)} + 1 deleted label"
+    end
+
+    it 'returns text note for added and removed labels' do
+      add_events = [create_event(created_at: time),
+                    create_event(created_at: time, label: nil)]
+
+      remove_events = [create_event(action: :remove, created_at: time),
+                       create_event(action: :remove, created_at: time, label: nil)]
+
+      note = described_class.from_events(add_events + remove_events)
+
+      expect(note.note).to eq "added #{label_refs(add_events)} + 1 deleted label and removed #{label_refs(remove_events)} + 1 deleted label"
+    end
+
+    it 'returns text note for cross-project label' do
+      other_label = create(:label)
+      event = create_event(label: other_label)
+
+      note = described_class.from_events([event])
+
+      expect(note.note).to eq "added #{other_label.to_reference(resource_parent)} label"
+    end
+
+    it 'returns text note for cross-group label' do
+      other_label = create(:group_label)
+      event = create_event(label: other_label)
+
+      note = described_class.from_events([event])
+
+      expect(note.note).to eq "added #{other_label.to_reference(other_label.group, target_project: project, full: true)} label"
+    end
+  end
+end