kopia lustrzana https://github.com/RobertGawron/IonizationChamber
89 wiersze
4.0 KiB
Python
89 wiersze
4.0 KiB
Python
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"""Unit tests for :pyclass:`measurement_acquisition.application_layer.ApplicationLayer`."""
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# pylint: disable=protected-access
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from __future__ import annotations
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from unittest.mock import MagicMock, create_autospec
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import pytest
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from measurement_acquisition.application_layer import ApplicationLayer, MCP3425Converter
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from measurement_acquisition.interfaces import ITransportLayer
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class TestApplicationLayer: # pylint: disable=too-few-public-methods
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"""Behaviour and input-validation tests for :class:`ApplicationLayer`."""
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# ------------------------------------------------------------------ #
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# Fixtures #
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# ------------------------------------------------------------------ #
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@pytest.fixture()
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def mock_transport(self): # noqa: D401
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"""Autospecced transport-layer mock."""
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return create_autospec(ITransportLayer)
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@pytest.fixture()
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def mock_converter(self): # noqa: D401
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"""Generic mock converter implementing :class:`IADCConverter`."""
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return MagicMock()
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@pytest.fixture()
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def app_layer(self, mock_transport, mock_converter): # noqa: D401
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"""Default-configured :class:`ApplicationLayer`."""
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return ApplicationLayer(mock_transport, converter=mock_converter)
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# ------------------------------------------------------------------ #
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# Constructor behaviour #
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# ------------------------------------------------------------------ #
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def test_initialization(self, mock_transport, mock_converter):
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"""Verify default and custom initialisation paths."""
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# Defaults -----------------------------------------------------
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app = ApplicationLayer(mock_transport)
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assert isinstance(
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app._converter, MCP3425Converter
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) # pylint: disable=protected-access
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# Custom converter --------------------------------------------
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app = ApplicationLayer(mock_transport, converter=mock_converter)
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assert app._converter is mock_converter # pylint: disable=protected-access
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# ------------------------------------------------------------------ #
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# Transport connection #
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# ------------------------------------------------------------------ #
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def test_connect(self, app_layer, mock_transport):
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"""``connect`` should delegate to the transport layer."""
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app_layer.connect()
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mock_transport.connect.assert_called_once()
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# ------------------------------------------------------------------ #
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# Happy-path measurement retrieval #
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# ------------------------------------------------------------------ #
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def test_get_measurement_success(self, app_layer, mock_transport, mock_converter):
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"""Successful frame retrieval and conversion."""
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# Frame layout from DataFrameConfig:
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# byte 0 : header
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# byte 1 : adc_conf (e.g. 0xA0 : R12, gain×1, etc.)
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# byte 2 : adc_msb
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# byte 3 : adc_lsb
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# byte 4 : crc (ignored by ApplicationLayer)
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mock_frame = bytes([0x00, 0xA0, 0xAB, 0xCD, 0x00])
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mock_transport.get_frame.return_value = mock_frame
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mock_converter.convert.return_value = 3.1415
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result = app_layer.get_measurement()
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assert result == 3.1415
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mock_transport.get_frame.assert_called_once()
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mock_converter.convert.assert_called_with(0xAB, 0xCD, 0xA0)
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# ------------------------------------------------------------------ #
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# Error handling – incomplete frames #
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# ------------------------------------------------------------------ #
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def test_invalid_frame(self, app_layer, mock_transport):
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"""An incomplete frame must raise ``ValueError``."""
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# Too short (only header + conf)
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mock_transport.get_frame.return_value = bytes([0x00, 0x00])
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with pytest.raises(ValueError, match="Incomplete frame received"):
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app_layer.get_measurement()
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