refactor(gallery): add attachment_gallery_item component

spec/components/attachment/gallery_item_component_spec.rb

@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe Attachment::GalleryItemComponent, type: :component do
+  let(:procedure) { create(:procedure, :published, types_de_champ_public:) }
+  let(:types_de_champ_public) { [{ type: :piece_justificative }] }
+  let(:dossier) { create(:dossier, :with_populated_champs, :en_construction, procedure:) }
+  let(:filename) { attachment.blob.filename.to_s }
+
+  let(:component) { described_class.new(attachment: attachment) }
+
+  subject { render_inline(component).to_html }
+
+  context "when attachment is from a piece justificative champ" do
+    let(:champ) { dossier.champs.first }
+    let(:libelle) { champ.libelle }
+    let(:attachment) { champ.piece_justificative_file.attachments.first }
+
+    it "displays libelle, link and renders title" do
+      expect(subject).to have_text(libelle)
+      expect(subject).not_to have_text('Pièce jointe au message')
+      expect(subject).to have_link(filename)
+      expect(component.title).to eq("#{libelle} -- #{filename}")
+    end
+  end
+
+  context "when attachment is from a commentaire" do
+    let(:commentaire) { create(:commentaire, :with_file, dossier: dossier) }
+    let(:attachment) { commentaire.piece_jointe.first }
+
+    it "displays a generic libelle, link and renders title" do
+      expect(subject).to have_text('Pièce jointe au message')
+      expect(subject).to have_link(filename)
+      expect(component.title).to eq("Pièce jointe au message -- #{filename}")
+    end
+  end
+end