add placeholder tests for bulk upload mailer

app/mailers/bulk_upload_mailer.rb

@@ -66,17 +66,23 @@ class BulkUploadMailer < NotifyMailer
     )
   end
 
-  def send_bulk_upload_failed_file_setup_error_mail(user, bulk_upload)
+  def send_bulk_upload_failed_file_setup_error_mail(bulk_upload:)
+    bulk_upload_link = if bulk_upload.lettings?
+                         start_bulk_upload_lettings_logs_url
+                       else
+                         start_bulk_upload_sales_logs_url
+                       end
+
     send_email(
-      user.email,
+      bulk_upload.user.email,
       BULK_UPLOAD_FAILED_FILE_SETUP_ERROR_TEMPLATE_ID,
       {
-        filename: "[#{bulk_upload} filename]",
-        upload_timestamp: "[#{bulk_upload} upload_timestamp]",
-        lettings_or_sales: "[#{bulk_upload} lettings_or_sales]",
-        year_combo: "[#{bulk_upload} year_combo]",
-        errors_list: "[#{bulk_upload} errors_list]",
-        bulk_upload_link: "[#{bulk_upload} bulk_upload_link]",
+        filename: bulk_upload.filename,
+        upload_timestamp: bulk_upload.created_at.to_fs(:govuk_date_and_time),
+        lettings_or_sales: bulk_upload.log_type,
+        year_combo: bulk_upload.year_combo,
+        errors_list: [].join("\n"),
+        bulk_upload_link:,
       },
     )
   end

spec/mailers/bulk_upload_mailer_spec.rb

@@ -12,6 +12,25 @@ RSpec.describe BulkUploadMailer do
     allow(notify_client).to receive(:send_email).and_return(true)
   end
 
+  describe "#send_bulk_upload_failed_file_setup_error_mail" do
+    it "sends correctly formed email" do
+      expect(notify_client).to receive(:send_email).with(
+        email_address: bulk_upload.user.email,
+        template_id: described_class::BULK_UPLOAD_FAILED_FILE_SETUP_ERROR_TEMPLATE_ID,
+        personalisation: {
+          filename: bulk_upload.filename,
+          upload_timestamp: bulk_upload.created_at.to_fs(:govuk_date_and_time),
+          lettings_or_sales: bulk_upload.log_type,
+          year_combo: bulk_upload.year_combo,
+          errors_list: [].join("\n"),
+          bulk_upload_link: start_bulk_upload_lettings_logs_url,
+        },
+      )
+
+      mailer.send_bulk_upload_failed_file_setup_error_mail(bulk_upload:)
+    end
+  end
+
   describe "#send_bulk_upload_complete_mail" do
     it "sends correctly formed email" do
       expect(notify_client).to receive(:send_email).with(