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# SPDX-License-Identifier: GPL-2.0-or-later
# SPDX-FileCopyrightText: 2022 Bartosz Golaszewski <brgl@bgdev.pl>
import datetime
import errno
import gpiod
import threading
import time
import unittest
from . import gpiosim
from dataclasses import FrozenInstanceError
from functools import partial
from gpiod.line import Direction
from unittest import TestCase
EventType = gpiod.InfoEvent.Type
class InfoEventDataclassBehavior(TestCase):
def test_info_event_props_are_frozen(self):
sim = gpiosim.Chip()
with gpiod.Chip(sim.dev_path) as chip:
chip.watch_line_info(0)
with chip.request_lines(config={0: None}) as request:
self.assertTrue(chip.wait_info_event(datetime.timedelta(seconds=1)))
event = chip.read_info_event()
with self.assertRaises(FrozenInstanceError):
event.event_type = 4
with self.assertRaises(FrozenInstanceError):
event.timestamp_ns = 4
with self.assertRaises(FrozenInstanceError):
event.line_info = 4
def request_reconfigure_release_line(chip_path, offset):
time.sleep(0.1)
with gpiod.request_lines(chip_path, config={offset: None}) as request:
time.sleep(0.1)
request.reconfigure_lines(
config={offset: gpiod.LineSettings(direction=Direction.OUTPUT)}
)
time.sleep(0.1)
class WatchingInfoEventWorks(TestCase):
def setUp(self):
self.sim = gpiosim.Chip(num_lines=8, line_names={4: "foobar"})
self.chip = gpiod.Chip(self.sim.dev_path)
self.thread = None
def tearDown(self):
if self.thread:
self.thread.join()
self.thread = None
self.chip.close()
self.chip = None
self.sim = None
def test_watch_line_info_returns_line_info(self):
info = self.chip.watch_line_info(7)
self.assertEqual(info.offset, 7)
def test_watch_line_info_keyword_argument(self):
info = self.chip.watch_line_info(line=7)
def test_watch_line_info_offset_out_of_range(self):
with self.assertRaises(ValueError):
self.chip.watch_line_info(8)
def test_watch_line_info_no_arguments(self):
with self.assertRaises(TypeError):
self.chip.watch_line_info()
def test_watch_line_info_by_line_name(self):
self.chip.watch_line_info("foobar")
def test_watch_line_info_invalid_argument_type(self):
with self.assertRaises(TypeError):
self.chip.watch_line_info(None)
def test_wait_for_event_timeout(self):
info = self.chip.watch_line_info(7)
self.assertFalse(
self.chip.wait_info_event(datetime.timedelta(microseconds=10000))
)
def test_request_reconfigure_release_events(self):
info = self.chip.watch_line_info(7)
self.assertEqual(info.direction, Direction.INPUT)
self.thread = threading.Thread(
target=partial(request_reconfigure_release_line, self.sim.dev_path, 7)
)
self.thread.start()
self.assertTrue(self.chip.wait_info_event(datetime.timedelta(seconds=1)))
event = self.chip.read_info_event()
self.assertEqual(event.event_type, EventType.LINE_REQUESTED)
self.assertEqual(event.line_info.offset, 7)
self.assertEqual(event.line_info.direction, Direction.INPUT)
ts_req = event.timestamp_ns
# Check that we can use a float directly instead of datetime.timedelta.
self.assertTrue(self.chip.wait_info_event(1.0))
event = self.chip.read_info_event()
self.assertEqual(event.event_type, EventType.LINE_CONFIG_CHANGED)
self.assertEqual(event.line_info.offset, 7)
self.assertEqual(event.line_info.direction, Direction.OUTPUT)
ts_rec = event.timestamp_ns
self.assertTrue(self.chip.wait_info_event(datetime.timedelta(seconds=1)))
event = self.chip.read_info_event()
self.assertEqual(event.event_type, EventType.LINE_RELEASED)
self.assertEqual(event.line_info.offset, 7)
self.assertEqual(event.line_info.direction, Direction.OUTPUT)
ts_rel = event.timestamp_ns
# No more events.
self.assertFalse(
self.chip.wait_info_event(datetime.timedelta(microseconds=10000))
)
# Check timestamps are really monotonic.
self.assertGreater(ts_rel, ts_rec)
self.assertGreater(ts_rec, ts_req)
class UnwatchingLineInfo(TestCase):
def setUp(self):
self.sim = gpiosim.Chip(num_lines=8, line_names={4: "foobar"})
self.chip = gpiod.Chip(self.sim.dev_path)
def tearDown(self):
self.chip.close()
self.chip = None
self.sim = None
def test_unwatch_line_info(self):
self.chip.watch_line_info(0)
with self.chip.request_lines(config={0: None}) as request:
self.assertTrue(self.chip.wait_info_event(datetime.timedelta(seconds=1)))
event = self.chip.read_info_event()
self.assertEqual(event.event_type, EventType.LINE_REQUESTED)
self.chip.unwatch_line_info(0)
self.assertFalse(
self.chip.wait_info_event(datetime.timedelta(microseconds=10000))
)
def test_unwatch_not_watched_line(self):
with self.assertRaises(OSError) as ex:
self.chip.unwatch_line_info(2)
self.assertEqual(ex.exception.errno, errno.EBUSY)
def test_unwatch_line_info_no_argument(self):
with self.assertRaises(TypeError):
self.chip.unwatch_line_info()
def test_unwatch_line_info_by_line_name(self):
self.chip.watch_line_info(4)
with self.chip.request_lines(config={4: None}) as request:
self.assertIsNotNone(self.chip.read_info_event())
self.chip.unwatch_line_info("foobar")
self.assertFalse(
self.chip.wait_info_event(datetime.timedelta(microseconds=10000))
)
class InfoEventStringRepresentation(TestCase):
def test_info_event_str(self):
sim = gpiosim.Chip()
with gpiod.Chip(sim.dev_path) as chip:
chip.watch_line_info(0)
with chip.request_lines(config={0: None}) as request:
self.assertTrue(chip.wait_info_event(datetime.timedelta(seconds=1)))
event = chip.read_info_event()
self.assertRegex(
str(event),
'<InfoEvent type=Type\\.LINE_REQUESTED timestamp_ns=[0-9]+ line_info=<LineInfo offset=0 name="None" used=True consumer="\\?" direction=Direction\\.INPUT active_low=False bias=Bias\\.UNKNOWN drive=Drive\\.PUSH_PULL edge_detection=Edge\\.NONE event_clock=Clock\\.MONOTONIC debounced=False debounce_period=0:00:00>>',
)
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