champs: show attachment actions only when the atachment is persisted

Fix #3961

app/views/shared/attachment/_update.html.haml

@@ -5,8 +5,10 @@
       = link_to('le modèle suivant', url_for(template), target: '_blank', rel: 'noopener')
 
   - attachment_id = attachment ? attachment.id : SecureRandom.uuid
+  - persisted = attachment && attachment.persisted?
   - user_can_destroy = defined?(user_can_destroy) ? user_can_destroy : false
-  - if attachment
+
+  - if persisted
     .piece-justificative-actions{ id: "piece_justificative_#{attachment_id}" }
       .piece-justificative-action
         = render partial: "shared/attachment/show", locals: { attachment: attachment, user_can_upload: true }
@@ -18,5 +20,5 @@
 
   = form.file_field :piece_justificative_file,
     id: "piece_justificative_file_#{attachment_id}",
-    class: "piece-justificative-input #{'hidden' if attachment}",
+    class: "piece-justificative-input #{'hidden' if persisted}",
     direct_upload: true

spec/factories/champ.rb

@@ -147,7 +147,7 @@ FactoryBot.define do
   factory :champ_piece_justificative, class: 'Champs::PieceJustificativeChamp' do
     type_de_champ { create(:type_de_champ_piece_justificative) }
 
-    after(:create) do |champ, _evaluator|
+    after(:build) do |champ, _evaluator|
       champ.piece_justificative_file.attach(io: StringIO.new("toto"), filename: "toto.txt", content_type: "text/plain")
     end
   end

spec/views/shared/attachment/_update.html.haml_spec.rb

@@ -0,0 +1,65 @@
+require 'rails_helper'
+
+describe 'shared/attachment/_update.html.haml', type: :view do
+  let(:champ) { build(:champ_piece_justificative, dossier: create(:dossier)) }
+  let(:attachment) { nil }
+  let(:virus_scan_result) { nil }
+  let(:user_can_destroy) { false }
+
+  subject do
+    form_for(champ.dossier) do |form|
+      render 'shared/attachment/update', {
+        attachment: attachment,
+        user_can_destroy: user_can_destroy,
+        form: form
+      }
+    end
+  end
+
+  it 'renders a form field for uploading a file' do
+    expect(subject).to have_selector('input[type=file]:not(.hidden)')
+  end
+
+  context 'when there is a attached file' do
+    let(:attachment) { champ.piece_justificative_file.attachment }
+
+    it 'renders a form field for uploading a file' do
+      expect(subject).to have_selector('input[type=file]:not(.hidden)')
+    end
+
+    it 'does not renders a link to the unsaved file' do
+      expect(subject).not_to have_content(attachment.filename.to_s)
+    end
+
+    it 'doesn’t render action buttons' do
+      expect(subject).not_to have_link('Remplacer')
+      expect(subject).not_to have_link('Supprimer')
+    end
+
+    context 'and the attachment has been saved' do
+      before { champ.save! }
+
+      it 'renders a link to the file' do
+        expect(subject).to have_content(attachment.filename.to_s)
+      end
+
+      it 'renders action buttons' do
+        expect(subject).to have_button('Remplacer')
+      end
+
+      it 'hides the form field by default' do
+        expect(subject).to have_selector('input[type=file].hidden')
+      end
+
+      it 'hides the Delete button by default' do
+        is_expected.not_to have_link('Supprimer')
+      end
+
+      context 'and the user can delete the attachment' do
+        let(:user_can_destroy) { true }
+
+        it { is_expected.to have_link('Supprimer') }
+      end
+    end
+  end
+end