add bulk upload mailer test

app/mailers/bulk_upload_mailer.rb

@@ -83,16 +83,24 @@ class BulkUploadMailer < NotifyMailer
     )
   end
 
-  def send_bulk_upload_with_errors_mail(user, bulk_upload)
+  def send_bulk_upload_with_errors_mail(bulk_upload:)
+    n = bulk_upload.logs.where.not(status: %w[completed]).count
+
+    n_logs = pluralize(n, "log")
+
+    title = "We found #{n_logs} with errors"
+
+    error_description = "We created logs from your #{bulk_upload.year_combo} #{bulk_upload.log_type} data. There was a problem with #{n} of the logs. Click the below link to fix these logs."
+
     send_email(
-      user.email,
+      bulk_upload.user.email,
       BULK_UPLOAD_WITH_ERRORS_TEMPLATE_ID,
       {
-        title: "[#{bulk_upload} title]",
-        filename: "[#{bulk_upload} filename]",
-        upload_timestamp: "[#{bulk_upload} upload_timestamp]",
-        error_description: "[#{bulk_upload} error_description]",
-        summary_report_link: "[#{bulk_upload} summary_report_link]",
+        title:,
+        filename: bulk_upload.filename,
+        upload_timestamp: bulk_upload.created_at.to_fs(:govuk_date_and_time),
+        error_description:,
+        summary_report_link: summary_bulk_upload_lettings_result_url(bulk_upload),
       },
     )
   end

spec/mailers/bulk_upload_mailer_spec.rb

@@ -47,4 +47,32 @@ RSpec.describe BulkUploadMailer do
       mailer.send_bulk_upload_failed_service_error_mail(bulk_upload:)
     end
   end
+
+  context "when bulk upload has log which is not completed" do
+    before do
+      create(:lettings_log, :in_progress, bulk_upload:)
+    end
+
+    describe "#send_bulk_upload_with_errors_mail" do
+      let(:error_description) do
+        "We created logs from your 2022/23 lettings data. There was a problem with 1 of the logs. Click the below link to fix these logs."
+      end
+
+      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_WITH_ERRORS_TEMPLATE_ID,
+          personalisation: {
+            title: "We found 1 log with errors",
+            filename: bulk_upload.filename,
+            upload_timestamp: bulk_upload.created_at.to_fs(:govuk_date_and_time),
+            error_description:,
+            summary_report_link: "http://localhost:3000/lettings-logs/bulk-upload-results/#{bulk_upload.id}/summary",
+          },
+        )
+
+        mailer.send_bulk_upload_with_errors_mail(bulk_upload:)
+      end
+    end
+  end
 end