+@then(u'a (?P<fmt>\w+) user error is returned')
+def check_page_error(context, fmt):
+ context.execute_steps("Then a HTTP 400 is returned")
+ eq_(context.response.format, fmt)
+
+ if fmt == 'html':
+ assert_is_not_none(re.search(r'<html( |>).+</html>', context.response.page, re.DOTALL))
+ elif fmt == 'xml':
+ assert_is_not_none(re.search(r'<error>.+</error>', context.response.page, re.DOTALL))
+ else:
+ assert_is_not_none(re.search(r'({"error":)', context.response.page, re.DOTALL))
+