'Call ``POST /regions`` with an ID in the request body.'

def test_create_region(self):

    ref = unit.new_region_ref()
    r = self.post('/regions', body={'region': ref})
    self.assertValidRegionResponse(r, ref)
    r = self.get(('/regions/%(region_id)s' % {'region_id': ref['id']}))
    self.assertValidRegionResponse(r, ref)
