'The C{_formatRoot} method formats a long unicode string using the
built-in repr with an ellipsis.'

def test_formatRootLongUnicodeString(self):

    e = self.makeFlattenerError()
    longString = nativeString(('abcde-' * 20))
    self.assertEqual(e._formatRoot(longString), repr('abcde-abcde-abcde-ab<...>e-abcde-abcde-abcde-'))
