def METHOD_NAME():
    response = app.get("/sim/ts1/gather/halo/test_image.json")
    assert response.content_type == 'application/json'
    assert response.status_int == 200
    result = json.loads(response.body.decode('utf-8'))
    assert result['timestep']=='ts1'
    assert result['data_formatted'][0]=="Array"
    assert result['is_number'] is False
    assert result['is_boolean'] is False
    assert result['is_array'] is True