'Formatting an unformattable event that has an unformattable key.'

def test_formatUnformattableEventWithUnformattableKey(self):

    event = {'log_format': '{evil()}', 'evil': (lambda : (1 / 0)), Unformattable(): 'gurk'}
    result = formatEvent(event)
    self.assertIn('MESSAGE    LOST:    unformattable    object    logged:', result)
    self.assertIn('Recoverable    data:', result)
    self.assertIn('Exception    during    formatting:', result)
