def main():
"""Main program -- calls other methods and prints results in a human-readable format
"""
sensor = TemperatureSensor(sensor_results_file)
print()
print("Sensor: %s" % (sensor.get_sensor_name()))
print("Period: %s to %s" % (sensor.get_time_period()))
print("Lowest Temp: %f%cC" %
(sensor.get_reading_stats().get_lowest_reading(), DEGREE_SIGN))
print("Average Temp: %f%cC" %
(sensor.get_reading_stats().get_average_reading(), DEGREE_SIGN))
print("Highest Temp: %f%cC" %
(sensor.get_reading_stats().get_highest_reading(), DEGREE_SIGN))
print(
"Largest Temp Range: %f%cC" %
(sensor.get_reading_stats().get_largest_reading_range(), DEGREE_SIGN))
if isinstance(sensor.get_error_messages(), list) > 0:
print("Error Messages:")
for msg in sensor.get_error_messages():
print(" " + msg)
else:
print("No Error Readings")
sensor = PressureSensor(sensor_results_file2)
print()
print("Sensor: %s" % (sensor.get_sensor_name()))
print("Period: %s to %s" % (sensor.get_time_period()))
print("Lowest Pressure: %f %s" %
(sensor.get_reading_stats().get_lowest_reading(), PRESSURE_SIGN))
print("Average Pressure: %f %s" %
(sensor.get_reading_stats().get_average_reading(), PRESSURE_SIGN))
print("Highest Pressure: %f %s" %
(sensor.get_reading_stats().get_highest_reading(), PRESSURE_SIGN))
print("Largest Pressure Range: %f %s" %
(sensor.get_reading_stats().get_largest_reading_range(),
PRESSURE_SIGN))
if isinstance(sensor.get_error_messages(), list) > 0:
print("Error Messages:")
for msg in sensor.get_error_messages():
print(" " + msg)
else:
print("No Error Readings")
class TestTemperatureSensor(TestCase):
""" Unit Tests for the TemperatureSensor Class """
TEST_READINGS = [
[
"2018-09-23 19:56:01.345", "1", "ABC Sensor Temp M301A", "20.152",
"21.367", "22.005", "OK"
],
[
"2018-09-23 19:57:02.321", "1", "ABC Sensor Temp M301A", "20.163",
"21.435", "22.103", "OK"
],
[
"2018-09-23 19:58:01.324", "3", "ABC Sensor Temp M301A", "20.142",
"21.528", "21.803", "OK"
],
[
"2018-09-23 19:59:04.000", "4", "ABC Sensor Temp M301A", "20.212",
"21.641", "22.017", "OK"
],
[
"2018-09-23 20:00:01.453", "5", "ABC Sensor Temp M301A", "100.000",
"100.000", "100.000", "HIGH_TEMP"
],
[
"2018-09-23 20:01:01.111", "6", "ABC Sensor Temp M301A", "21.244",
"21.355", "22.103", "OK"
],
[
"2018-09-23 20:02:02.324", "7", "ABC Sensor Temp M301A", "21.112",
"22.345", "22.703", "OK"
],
[
"2018-09-23 20:03:02.744", "8", "ABC Sensor Temp M301A", "20.513",
"21.745", "22.105", "OK"
],
[
"2018-09-23 20:04:01.123", "9", "ABC Sensor Temp M301A", "20.333",
"21.348", "21.943", "OK"
],
[
"2018-09-23 20:04:01.999", "10", "ABC Sensor Temp M301A", "20.332",
"21.445", "22.013", "OK"
],
[
"2018-09-23 20:04:02.001", "11", "ABC Sensor Temp M301A",
"-50.000", "-50.000", "-50.000", "LOW_TEMP"
]
]
# This mocks the builtin file open method in python always return '1' for the file data (we don't care
# since we are mocking the csv reader as well.
@patch('builtins.open', mock_open(read_data='1'))
def setUp(self):
""" Creates a test fixture before each test method is run """
self.logPoint()
# This mocks the csv reader to return our test readings
csv.reader = MagicMock(
return_value=TestTemperatureSensor.TEST_READINGS)
self.test_temperature_sensor = TemperatureSensor("testresults.csv")
def test_temperature_sensor_readings(self):
""" 010A - Valid Construction of the sensor """
self.assertIsNotNone(self.test_temperature_sensor,
"Test readings must be defined")
def test_invalid_temperature_sensor_parameter(self):
""" 010B - Invalid Construction of the sensor """
# Must reject an undefined sensor path
with self.assertRaises(ValueError):
TemperatureSensor(None)
# Must reject an empty sensor path
with self.assertRaises(ValueError):
TemperatureSensor("")
def test_provide_sensor_name(self):
""" 020A - Valid sensor name return """
self.assertEqual(self.test_temperature_sensor.get_sensor_name(),
"ABC Sensor Temp M301A")
def test_get_time_period(self):
""" 030A - Valid sensor time period return """
self.assertEqual(self.test_temperature_sensor.get_time_period()[0],
'2018/09/23 19:56')
self.assertEqual(self.test_temperature_sensor.get_time_period()[1],
'2018/09/23 20:04')
def test_get_reading_stats(self):
""" 040A - Valid temperature stats return """
self.assertEqual(
self.test_temperature_sensor.get_reading_stats().
get_lowest_reading(), 20.142)
self.assertEqual(
self.test_temperature_sensor.get_reading_stats().
get_average_reading(), 21.578777777777777)
self.assertEqual(
self.test_temperature_sensor.get_reading_stats().
get_highest_reading(), 22.703)
self.assertEqual(
self.test_temperature_sensor.get_reading_stats().
get_largest_reading_range(), 1.9400000000000013)
def test_get_error_readings(self):
""" 050A - Valid error readings return """
self.assertEqual(self.test_temperature_sensor.get_error_messages(), [
'High Temperature (100°C) at 2018/09/23 20:00, Sequence: 5',
'Low Temperature (-50°C) at 2018/09/23 20:04, Sequence: 11'
])
def tearDown(self):
""" Prints a log point when test is finished """
self.logPoint()
def logPoint(self):
""" Utility function used for module functions and class methods """
current_test = self.id().split('.')[-1]
calling_function = inspect.stack()[1][3]
print('in %s - %s()' % (current_test, calling_function))