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Add support for fetching forecasts from the VRM API by Victron Energy. Retrieve forecasts for PV generation and total load of a Victron system from the internet. Tests for the new modules have been added, and the documentation has been updated accordingly. Signed-off-by: redmoon2711 <redmoon2711@gmx.de>
117 lines
3.9 KiB
Python
117 lines
3.9 KiB
Python
import json
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from unittest.mock import call, patch
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import pendulum
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import pytest
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import requests
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from akkudoktoreos.prediction.pvforecastvrm import (
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PVForecastVrm,
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VrmForecastRecords,
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VrmForecastResponse,
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)
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@pytest.fixture
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def pvforecast_instance(config_eos):
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# Settings for PVForecastVrm
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settings = {
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"pvforecast": {
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"provider": "PVForecastVrm",
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"provider_settings": {
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"pvforecast_vrm_token": "dummy-token",
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"pvforecast_vrm_idsite": 12345
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}
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}
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}
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config_eos.merge_settings_from_dict(settings)
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# start_datetime initialize
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start_dt = pendulum.datetime(2025, 1, 1, tz='Europe/Berlin')
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# create PVForecastVrm-instance with config and start_datetime
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pv = PVForecastVrm(config=config_eos.load, start_datetime=start_dt)
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return pv
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def mock_forecast_response():
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"""Return a fake VrmForecastResponse with sample data."""
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return VrmForecastResponse(
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success=True,
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records=VrmForecastRecords(
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vrm_consumption_fc=[],
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solar_yield_forecast=[
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(pendulum.datetime(2025, 1, 1, 0, 0, tz='Europe/Berlin').int_timestamp * 1000, 120.0),
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(pendulum.datetime(2025, 1, 1, 1, 0, tz='Europe/Berlin').int_timestamp * 1000, 130.0)
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]
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),
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totals={}
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)
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def test_update_data_updates_dc_and_ac_power(pvforecast_instance):
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with patch.object(pvforecast_instance, "_request_forecast", return_value=mock_forecast_response()), \
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patch.object(PVForecastVrm, "update_value") as mock_update:
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pvforecast_instance._update_data()
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# Check that update_value was called correctly
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assert mock_update.call_count == 2
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expected_calls = [
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call(
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pendulum.datetime(2025, 1, 1, 0, 0, tz='Europe/Berlin'),
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{"pvforecast_dc_power": 120.0, "pvforecast_ac_power": 115.2}
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),
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call(
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pendulum.datetime(2025, 1, 1, 1, 0, tz='Europe/Berlin'),
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{"pvforecast_dc_power": 130.0, "pvforecast_ac_power": 124.8}
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),
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]
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mock_update.assert_has_calls(expected_calls, any_order=False)
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def test_validate_data_accepts_valid_json():
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"""Test that _validate_data doesn't raise with valid input."""
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response = mock_forecast_response()
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json_data = response.model_dump_json()
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validated = PVForecastVrm._validate_data(json_data)
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assert validated.success
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assert len(validated.records.solar_yield_forecast) == 2
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def test_validate_data_invalid_json_raises():
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"""Test that _validate_data raises with invalid input."""
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invalid_json = json.dumps({"success": True}) # missing 'records'
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with pytest.raises(ValueError) as exc_info:
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PVForecastVrm._validate_data(invalid_json)
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assert "Field:" in str(exc_info.value)
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assert "records" in str(exc_info.value)
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def test_request_forecast_raises_on_http_error(pvforecast_instance):
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"""Ensure _request_forecast raises RuntimeError on HTTP failure."""
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with patch("requests.get", side_effect=requests.Timeout("Request timed out")) as mock_get:
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with pytest.raises(RuntimeError) as exc_info:
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pvforecast_instance._request_forecast(0, 1)
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assert "Failed to fetch pvforecast" in str(exc_info.value)
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mock_get.assert_called_once()
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def test_update_data_skips_on_empty_forecast(pvforecast_instance):
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"""Ensure no update_value calls are made if no forecast data is present."""
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empty_response = VrmForecastResponse(
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success=True,
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records=VrmForecastRecords(vrm_consumption_fc=[], solar_yield_forecast=[]),
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totals={}
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)
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with patch.object(pvforecast_instance, "_request_forecast", return_value=empty_response), \
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patch.object(PVForecastVrm, "update_value") as mock_update:
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pvforecast_instance._update_data()
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mock_update.assert_not_called()
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