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test_fan.py
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from datetime import datetime, timedelta
import pytest
from src.fan import Fan
from RPi.GPIO import assert_output, assert_duty_cycle, assert_setup, HIGH, LOW, IN, PUD_UP
def test_fan_turn_on_off_method_single_pin():
pin1 = 1
fan = Fan(pin1)
assert fan.is_off() is True
fan.turn_on()
assert fan.is_on() is True
assert_output(pin1, HIGH)
fan.turn_off()
assert fan.is_off() is True
assert_output(pin1, LOW)
fan.turn_off()
def test_fan_set_speed_method_without_pwm_pin():
pin1 = 1
fan = Fan(pin1)
with pytest.raises(ValueError):
fan.set_speed(50)
def test_fan_set_speed_method():
pin1, pin2, pin3 = 1, 2, 3
fan = Fan(pin1, pin2, pin3)
assert fan.is_off() is True
fan.set_speed(50)
assert fan.is_on() is True
assert_duty_cycle(pin3, 50)
assert_output(pin1, HIGH)
assert_output(pin2, LOW)
assert_output(pin3, HIGH)
assert_setup(pin2, IN, PUD_UP)
fan.set_speed(1)
assert fan.is_on() is True
assert_output(pin1, HIGH)
assert_output(pin3, HIGH)
fan.set_speed(0)
assert fan.is_off() is True
assert_output(pin1, LOW)
assert_output(pin3, LOW)
fan.turn_off()
def test_fan_smart_set_speed_method():
pin1, pin2, pin3 = 1, 2, 3
il = 300
fan = Fan(pin1, pin2, pin3, idle_limit=il)
fan.smart_set_speed(50)
fan.smart_set_speed(0)
assert fan.is_on() is True
assert_output(pin1, HIGH)
assert_output(pin3, HIGH)
ten_minutes_ago = datetime.now() - timedelta(minutes=10)
fan.turned_on_at = ten_minutes_ago
fan.smart_set_speed(0)
assert fan.is_off() is True
assert_output(pin1, LOW)
assert_output(pin3, LOW)
fan.turn_off()
def test_fan_read_hw_temperature_method():
pin1, pin2, pin3 = 1, 2, 3
fan = Fan(pin1, pin2, pin3)
assert fan.read_hw_temperature() > 15
def test_fan_measure_rpm_method():
pin1, pin2, pin3 = 1, 2, 3
edges = 10
fan = Fan(pin1, pin2, pin3, rpm_measurement_edges=edges)
fan.set_speed(50)
assert fan.measure_rpm() > 100
fan.turn_off()
def test_fan_measure_rpm_method_too_small_timeout():
pin1, pin2, pin3 = 1, 2, 3
edges = 10
timeout = 1
fan = Fan(pin1, pin2, pin3, rpm_measurement_edges=edges, rpm_measurement_timeout=timeout)
fan.set_speed(50)
assert fan.measure_rpm() == 0
fan.turn_off()
def test_fan_measure_rpm_method_without_sense_pin():
pin1, pin2 = 1, 2
fan = Fan(pin1, pwm=pin2)
with pytest.raises(ValueError):
fan.measure_rpm()
def test_fan_temp_to_speed_method():
pin1, pin2, pin3 = 1, 2, 3
sm = [
(20, 1),
(40, 30),
(70, 50),
(75, 70),
(80, 100)
]
fan = Fan(pin1, pin2, pin3, speed_mapping=sm)
assert fan.temp_to_speed(10) == 0
assert fan.temp_to_speed(20) == 1
assert fan.temp_to_speed(70) == 50
assert fan.temp_to_speed(80) == 100
assert fan.temp_to_speed(85) == 100
def test_fan_temp_to_speed_method_single_level():
pin1, pin2, pin3 = 1, 2, 3
sm = [
(40, 30)
]
fan = Fan(pin1, pin2, pin3, speed_mapping=sm)
assert fan.temp_to_speed(39) == 0
assert fan.temp_to_speed(40) == 30
assert fan.temp_to_speed(70) == 30
def test_fan_auto_set_method():
pin1, pin2, pin3 = 1, 2, 3
il = 300
ct = 0
sm = [
(20, 1),
(40, 30),
(70, 50),
(75, 70),
(80, 100)
]
fan = Fan(pin1, pin2, pin3, speed_mapping=sm, idle_limit=il, cycletime=ct)
temp = 19
fan.auto_set(temp)
assert fan.is_off() is True
assert_output(pin1, LOW)
assert_output(pin3, LOW)
assert_duty_cycle(pin3, 0)
temp = 42
fan.auto_set(temp)
assert fan.is_on() is True
assert_output(pin1, HIGH)
assert_output(pin3, HIGH)
assert_duty_cycle(pin3, 30)
# # This test was commented out to simulate a high cycletime environment,
# # where the temp changes between readings can be high.
# temp = 25
# fan.auto_set(temp)
# assert fan.is_on() is True
# assert_output(pin1, HIGH)
# assert_output(pin3, HIGH)
# assert_duty_cycle(pin3, 0)
temp = 19
fan.auto_set(temp)
assert fan.is_on() is True
assert_output(pin1, HIGH)
assert_output(pin3, HIGH)
assert_duty_cycle(pin3, 0)
ten_minutes_ago = datetime.now() - timedelta(minutes=10)
fan.turned_on_at = ten_minutes_ago
temp = 19
fan.auto_set(temp)
assert fan.is_off() is True
assert_output(pin1, LOW)
assert_output(pin3, LOW)
assert_duty_cycle(pin3, 0)
fan.turn_off()