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