Exercise: Basic “Sensor”

• Project Setup

Specification, And Setup

Implement a class ConstantSensor, such that the following works.

• A program, read-sensor-const.py. Download that into the programs/ directory of your project structure.

  read-sensor-const.py

  #!/usr/bin/env python
  
  from sensors.sensor_const import ConstantSensor
  
  sensor = ConstantSensor(36.7)
  temperature = sensor.get_temperature()
  print(temperature)
  

• A unit test; you download that into the tests/ subdirectory of you project.

  test_sensor_const.py

  from sensors.sensor_const import ConstantSensor
  import pytest
  
  def test_basic():
      sensor = ConstantSensor(36.7)
      temperature = sensor.get_temperature()
      assert temperature == pytest.approx(36.7)
  

• To set paths, follow the instructions in Project Setup

Verification

Program

Run the program,

$ python programs/read-sensor-const.py
36.7

Unit Test

In you project’s root directory, unit tests like follows …

$ python -m pytest
============================= test session starts ==============================
platform linux -- Python 3.10.7, pytest-7.2.0, pluggy-1.0.0
rootdir: <your project root>
collected 1 item

tests/test_sensor_const.py .                                             [100%]

============================== 1 passed in 0.01s ===============================

Dependencies