def METHOD_NAME(self):
    response = self.fetch(
        '/timeseries/demo/conc_chl', method="POST",
        body='{"type": "GeometryCollection", "geometries": null}'
    )
    self.assertResponseOK(response)
    response = self.fetch(
        '/timeseries/demo/conc_chl', method="POST",
        body='{"type": "GeometryCollection", "geometries": []}'
    )
    self.assertResponseOK(response)
    response = self.fetch(
        '/timeseries/demo/conc_chl', method="POST",
        body='{"type": "GeometryCollection", "geometries": '
             '[{"type": "Point", "coordinates": [1, 51]}]}'
    )
    self.assertResponseOK(response)