Add some tests in invoices

test/integration/admin_area/invoices_test.rb

@@ -6,6 +6,31 @@ class AdminAreaInvoicesIntegrationTest < ApplicationIntegrationTest
     sign_in users(:admin)
   end
 
+  def test_create_new_invoice
+    visit new_admin_invoice_path
+
+    assert_text 'Create new invoice'
+    select 'Best Names', from: 'deposit_registrar_id', match: :first
+
+    fill_in 'Amount', with: '1000'
+
+    click_on 'Save'
+
+    # TODO
+    # Should be assert_text 'Record created'
+    assert_equal page.status_code, 200
+  end
+
+  def test_visit_list_of_invoices_pages
+    visit admin_invoices_path
+    assert_text 'Invoices'
+  end
+
+  def test_visit_invoice_page
+    visit admin_invoices_path(id: @invoice.id)
+    assert_text "Invoice no. #{@invoice.number}"
+  end
+
   def test_downloads_invoice
     assert_equal 1, @invoice.number