Fix crash on successful import email

test/mailers/import_mailer_test.rb

@@ -0,0 +1,15 @@
+require "test_helper"
+
+class ImportMailerTest < ActionMailer::TestCase
+  test "completed" do
+    email = ImportMailer.completed(identities(:david), accounts(:"37s"))
+
+    assert_emails 1 do
+      email.deliver_now
+    end
+
+    assert_equal [ "david@37signals.com" ], email.to
+    assert_equal "Your Fizzy account import is done", email.subject
+    assert_match accounts(:"37s").slug, email.body.encoded
+  end
+end