[#1563] Generate a helpful alert on attestation / closed mail mismatch

app/views/admin/_closed_mail_template_attestation_inconsistency_alert.html.haml

@@ -0,0 +1,22 @@
+- case @procedure.closed_mail_template_attestation_inconsistency_state
+- when :missing_tag
+  .center
+    .alert{ class: flash_class('alert') }
+      Cette procédure comporte une attestation, mais l’accusé d’acceptation ne la mentionne pas :
+      - if !@procedure.locked?
+        = link_to('désactivez l’attestation', edit_admin_procedure_attestation_template_path(@procedure))
+        ou
+      = link_to('ajoutez la balise', edit_admin_procedure_mail_template_path(@procedure, Mails::ClosedMail::SLUG))
+      %code{ style: "white-space: pre-wrap;" }
+        \--lien attestation--
+      à l’accusé d’acceptation
+- when :extraneous_tag
+  .center
+    .alert{ class: flash_class('alert') }
+      Cette procédure ne comporte pas d’attestation, mais l’accusé d’acceptation en mentionne une :
+      = link_to('activez l’attestation', edit_admin_procedure_attestation_template_path(@procedure))
+      ou
+      = link_to('enlevez la balise', edit_admin_procedure_mail_template_path(@procedure, Mails::ClosedMail::SLUG))
+      %code{ style: "white-space: pre-wrap;" }
+        \--lien attestation--
+      de l’accusé d’acceptation

spec/views/admin/_closed_mail_template_attestation_inconsistency_alert.html.haml_spec.rb

@@ -0,0 +1,46 @@
+require 'spec_helper'
+
+describe 'admin/_closed_mail_template_attestation_inconsistency_alert.html.haml', type: :view do
+  let(:procedure) { create(:procedure, closed_mail: closed_mail, published_at: published_at) }
+  let(:published_at) { nil }
+
+  def alert
+    assign(:procedure, procedure)
+    render
+    rendered
+  end
+
+  context 'when there is no inconsistency' do
+    let(:closed_mail) { nil }
+
+    it { expect(alert).to be_empty }
+  end
+
+  context 'when there is no active attestation but the closed mail template mentions one' do
+    let(:closed_mail) { create(:closed_mail, body: '--lien attestation--') }
+
+    it { expect(alert).to include("Cette procédure ne comporte pas d’attestation, mais l’accusé d’acceptation en mentionne une") }
+    it { expect(alert).to include(edit_admin_procedure_attestation_template_path(procedure)) }
+    it { expect(alert).to include(edit_admin_procedure_mail_template_path(procedure, Mails::ClosedMail::SLUG)) }
+  end
+
+  context 'when there is an active attestation but the closed mail template does not mention it' do
+    let(:closed_mail) { create(:closed_mail) }
+    let!(:attestation_template) { create(:attestation_template, procedure: procedure, activated: true) }
+
+    it { expect(alert).to include("Cette procédure comporte une attestation, mais l’accusé d’acceptation ne la mentionne pas") }
+    it { expect(alert).to include(edit_admin_procedure_mail_template_path(procedure, Mails::ClosedMail::SLUG)) }
+
+    context 'when the procedure has been published, the attestation cannot be deactivated' do
+      let(:published_at) { Time.now }
+
+      it { expect(procedure.locked?).to be_truthy }
+      it { expect(alert).not_to include(edit_admin_procedure_attestation_template_path(procedure)) }
+    end
+
+    context 'when the procedure is still a draft' do
+      it { expect(procedure.locked?).to be_falsey }
+      it { expect(alert).to include(edit_admin_procedure_attestation_template_path(procedure)) }
+    end
+  end
+end