deye_set_time_processor_test.py

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import unittest
from unittest.mock import patch

from deye_modbus import DeyeModbus
from deye_set_time_processor import DeyeSetTimeProcessor
from deye_events import DeyeLoggerStatusEvent

class DeyeSetTimeProcessorTest(unittest.TestCase):

    @patch('deye_modbus.DeyeModbus')
    def test_set_time__when_logger_is_becoming_online(self, modbus):
        # given
        processor = DeyeSetTimeProcessor(modbus)

        # when
        processor.process([DeyeLoggerStatusEvent(True)])

        # then
        modbus.write_registers.assert_any_call(22, unittest.mock.ANY)

        # and
        self.assertTrue(processor.last_status)

    @patch('deye_modbus.DeyeModbus')
    def test_dont_set_time__when_logger_is_already_online(self, modbus):
        # given
        processor = DeyeSetTimeProcessor(modbus)

        # and
        processor.process([DeyeLoggerStatusEvent(True)])
        modbus.reset_mock()

        # when
        processor.process([DeyeLoggerStatusEvent(True)])

        # then
        modbus.write_register.assert_not_called()

        # and
        self.assertTrue(processor.last_status)

    @patch('deye_modbus.DeyeModbus')
    def test_keep_stored_status_set_to_offline__when_modbus_write_fails(self, modbus):
        # given
        processor = DeyeSetTimeProcessor(modbus)

        # and
        modbus.write_registers.return_value = False

        # when
        processor.process([DeyeLoggerStatusEvent(True)])

        # then
        modbus.write_registers.assert_any_call(22, unittest.mock.ANY)

        # and
        self.assertFalse(processor.last_status)