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# Copyright (C) 2023 Tomasz Kramkowski <tomasz@kramkow.ski>
# SPDX-License-Identifier: MIT
import unittest
from collections.abc import Iterator
from contextlib import contextmanager
from tempfile import TemporaryDirectory
from brightness import main
class TempSysfs:
def __init__(self, path: str) -> None:
self.path = path
def read(self, name) -> str:
with open(self.path + "/" + name) as f:
return f.read()
@property
def brightness(self) -> int:
return int(self.read("brightness").rstrip())
def max_brightness(self) -> int:
return int(self.read("max_brightness").rstrip())
@contextmanager
def fake_sysfs(brightness: int, max_brightness: int) -> Iterator[TempSysfs]:
with TemporaryDirectory() as d:
with open(d + "/brightness", "w") as f:
f.write(str(brightness) + "\n")
with open(d + "/max_brightness", "w") as f:
f.write(str(max_brightness) + "\n")
yield TempSysfs(d)
class TestCLI(unittest.TestCase):
def test_increment_10(self):
with fake_sysfs(brightness=70, max_brightness=255) as sysfs:
main(["brightness", sysfs.path, "+10"])
self.assertGreater(sysfs.brightness, 70)
self.assertLessEqual(sysfs.brightness, 255)
def test_decrement_10(self):
with fake_sysfs(brightness=70, max_brightness=255) as sysfs:
main(["brightness", sysfs.path, "-10"])
self.assertGreaterEqual(sysfs.brightness, 0)
self.assertLess(sysfs.brightness, 70)
def test_increase_small(self):
with fake_sysfs(brightness=0, max_brightness=255) as sysfs:
main(["brightness", sysfs.path, "+1"])
self.assertEqual(sysfs.brightness, 1)
def test_decrease_small(self):
with fake_sysfs(brightness=1, max_brightness=255) as sysfs:
main(["brightness", sysfs.path, "-1"])
self.assertEqual(sysfs.brightness, 0)
def test_increase_zero(self):
with fake_sysfs(brightness=127, max_brightness=255) as sysfs:
main(["brightness", sysfs.path, "+0"])
self.assertEqual(sysfs.brightness, 127)
def test_decrease_zero(self):
with fake_sysfs(brightness=127, max_brightness=255) as sysfs:
main(["brightness", sysfs.path, "-0"])
self.assertEqual(sysfs.brightness, 127)
def test_double(self):
with fake_sysfs(brightness=15, max_brightness=255) as sysfs:
main(["brightness", sysfs.path, "+" + str(1 / 8 * 100)])
self.assertEqual(sysfs.brightness, 31)
def test_halve(self):
with fake_sysfs(brightness=15, max_brightness=255) as sysfs:
main(["brightness", sysfs.path, str(-(1 / 8 * 100))])
self.assertEqual(sysfs.brightness, 7)
def test_clamp_low(self):
with fake_sysfs(brightness=127, max_brightness=255) as sysfs:
main(["brightness", sysfs.path, "-100"])
self.assertEqual(sysfs.brightness, 0)
def test_clamp_high(self):
with fake_sysfs(brightness=127, max_brightness=255) as sysfs:
main(["brightness", sysfs.path, "+100"])
self.assertEqual(sysfs.brightness, 255)
def test_absolute(self):
with fake_sysfs(brightness=127, max_brightness=255) as sysfs:
main(["brightness", sysfs.path, "0"])
self.assertEqual(sysfs.brightness, 0)
main(["brightness", sysfs.path, "12.5"])
self.assertEqual(sysfs.brightness, 1)
main(["brightness", sysfs.path, "25.0"])
self.assertEqual(sysfs.brightness, 3)
main(["brightness", sysfs.path, "100"])
self.assertEqual(sysfs.brightness, 255)
def test_min_value(self):
with fake_sysfs(brightness=127, max_brightness=255) as sysfs:
main(["brightness", "--min", "0", sysfs.path, "0"])
self.assertEqual(sysfs.brightness, 0)
main(["brightness", "--min", "10", sysfs.path, "0"])
self.assertEqual(sysfs.brightness, 10)
main(["brightness", "--min", "0%", sysfs.path, "0"])
self.assertEqual(sysfs.brightness, 0)
main(["brightness", "--min", "12.5%", sysfs.path, "0"])
self.assertEqual(sysfs.brightness, 1)
def test_max_value(self):
with fake_sysfs(brightness=127, max_brightness=255) as sysfs:
main(["brightness", "--max", "255", sysfs.path, "100"])
self.assertEqual(sysfs.brightness, 255)
main(["brightness", "--max", "245", sysfs.path, "100"])
self.assertEqual(sysfs.brightness, 245)
main(["brightness", "--max", "100%", sysfs.path, "100"])
self.assertEqual(sysfs.brightness, 255)
main(["brightness", "--max", "87.5%", sysfs.path, "100"])
self.assertEqual(sysfs.brightness, 127)
def test_min_max(self):
with fake_sysfs(brightness=127, max_brightness=255) as sysfs:
main(["brightness", "--min", "0", "--max", "255", sysfs.path, "0"])
self.assertEqual(sysfs.brightness, 0)
main(["brightness", "--min", "0", "--max", "255", sysfs.path, "100"])
self.assertEqual(sysfs.brightness, 255)
main(["brightness", "--min", "10", "--max", "245", sysfs.path, "0"])
self.assertEqual(sysfs.brightness, 10)
main(["brightness", "--min", "10", "--max", "245", sysfs.path, "100"])
self.assertEqual(sysfs.brightness, 245)
main(["brightness", "--min", "0%", "--max", "100%", sysfs.path, "0"])
self.assertEqual(sysfs.brightness, 0)
main(["brightness", "--min", "0%", "--max", "100%", sysfs.path, "100"])
self.assertEqual(sysfs.brightness, 255)
main(["brightness", "--min", "12.5%", "--max", "87.5%", sysfs.path, "0"])
self.assertEqual(sysfs.brightness, 1)
main(["brightness", "--min", "12.5%", "--max", "87.5%", sysfs.path, "100"])
self.assertEqual(sysfs.brightness, 127)
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