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# SPDX-License-Identifier: GPL-2.0-or-later
# SPDX-FileCopyrightText: 2022 Bartosz Golaszewski <brgl@bgdev.pl>
import errno
import gpiod
import os
from . import gpiosim
from .helpers import LinkGuard
from unittest import TestCase
class ChipConstructor(TestCase):
def test_open_existing_chip(self):
sim = gpiosim.Chip()
with gpiod.Chip(sim.dev_path):
pass
def test_open_existing_chip_with_keyword(self):
sim = gpiosim.Chip()
with gpiod.Chip(path=sim.dev_path):
pass
def test_open_chip_by_link(self):
link = "/tmp/gpiod-py-test-link.{}".format(os.getpid())
sim = gpiosim.Chip()
with LinkGuard(sim.dev_path, link):
with gpiod.Chip(link):
pass
def test_open_nonexistent_chip(self):
with self.assertRaises(OSError) as ex:
gpiod.Chip("/dev/nonexistent")
self.assertEqual(ex.exception.errno, errno.ENOENT)
def test_open_not_a_character_device(self):
with self.assertRaises(OSError) as ex:
gpiod.Chip("/tmp")
self.assertEqual(ex.exception.errno, errno.ENOTTY)
def test_open_not_a_gpio_device(self):
with self.assertRaises(OSError) as ex:
gpiod.Chip("/dev/null")
self.assertEqual(ex.exception.errno, errno.ENODEV)
def test_missing_path(self):
with self.assertRaises(TypeError):
gpiod.Chip()
def test_invalid_type_for_path(self):
with self.assertRaises(TypeError):
gpiod.Chip(4)
class ChipBooleanConversion(TestCase):
def test_chip_bool(self):
sim = gpiosim.Chip()
chip = gpiod.Chip(sim.dev_path)
self.assertTrue(chip)
chip.close()
self.assertFalse(chip)
class ChipProperties(TestCase):
def setUp(self):
self.sim = gpiosim.Chip()
self.chip = gpiod.Chip(self.sim.dev_path)
def tearDown(self):
self.chip.close()
self.sim = None
def test_get_chip_path(self):
self.assertEqual(self.sim.dev_path, self.chip.path)
def test_get_fd(self):
self.assertGreaterEqual(self.chip.fd, 0)
def test_properties_are_immutable(self):
with self.assertRaises(AttributeError):
self.chip.path = "foobar"
with self.assertRaises(AttributeError):
self.chip.fd = 4
class ChipDevPathFromLink(TestCase):
def test_dev_path_open_by_link(self):
sim = gpiosim.Chip()
link = "/tmp/gpiod-py-test-link.{}".format(os.getpid())
with LinkGuard(sim.dev_path, link):
with gpiod.Chip(link) as chip:
self.assertEqual(chip.path, link)
class ChipMapLine(TestCase):
def test_lookup_by_name_good(self):
sim = gpiosim.Chip(
num_lines=8, line_names={1: "foo", 2: "bar", 4: "baz", 5: "xyz"}
)
with gpiod.Chip(sim.dev_path) as chip:
self.assertEqual(chip.line_offset_from_id("baz"), 4)
def test_lookup_by_name_good_keyword_argument(self):
sim = gpiosim.Chip(
num_lines=8, line_names={1: "foo", 2: "bar", 4: "baz", 5: "xyz"}
)
with gpiod.Chip(sim.dev_path) as chip:
self.assertEqual(chip.line_offset_from_id(id="baz"), 4)
def test_lookup_bad_name(self):
sim = gpiosim.Chip(
num_lines=8, line_names={1: "foo", 2: "bar", 4: "baz", 5: "xyz"}
)
with gpiod.Chip(sim.dev_path) as chip:
with self.assertRaises(FileNotFoundError):
chip.line_offset_from_id("nonexistent")
def test_lookup_bad_offset(self):
sim = gpiosim.Chip()
with gpiod.Chip(sim.dev_path) as chip:
with self.assertRaises(ValueError):
chip.line_offset_from_id(4)
def test_lookup_bad_offset_as_string(self):
sim = gpiosim.Chip()
with gpiod.Chip(sim.dev_path) as chip:
with self.assertRaises(ValueError):
chip.line_offset_from_id("4")
def test_duplicate_names(self):
sim = gpiosim.Chip(
num_lines=8, line_names={1: "foo", 2: "bar", 4: "baz", 5: "bar"}
)
with gpiod.Chip(sim.dev_path) as chip:
self.assertEqual(chip.line_offset_from_id("bar"), 2)
def test_integer_offsets(self):
sim = gpiosim.Chip(num_lines=8, line_names={1: "foo", 2: "bar", 6: "baz"})
with gpiod.Chip(sim.dev_path) as chip:
self.assertEqual(chip.line_offset_from_id(4), 4)
self.assertEqual(chip.line_offset_from_id(1), 1)
def test_offsets_as_string(self):
sim = gpiosim.Chip(num_lines=8, line_names={1: "foo", 2: "bar", 7: "6"})
with gpiod.Chip(sim.dev_path) as chip:
self.assertEqual(chip.line_offset_from_id("2"), 2)
self.assertEqual(chip.line_offset_from_id("6"), 7)
class ClosedChipCannotBeUsed(TestCase):
def test_close_chip_and_try_to_use_it(self):
sim = gpiosim.Chip(label="foobar")
chip = gpiod.Chip(sim.dev_path)
chip.close()
with self.assertRaises(gpiod.ChipClosedError):
chip.path
def test_close_chip_and_try_controlled_execution(self):
sim = gpiosim.Chip()
chip = gpiod.Chip(sim.dev_path)
chip.close()
with self.assertRaises(gpiod.ChipClosedError):
with chip:
chip.fd
def test_close_chip_twice(self):
sim = gpiosim.Chip(label="foobar")
chip = gpiod.Chip(sim.dev_path)
chip.close()
with self.assertRaises(gpiod.ChipClosedError):
chip.close()
class StringRepresentation(TestCase):
def setUp(self):
self.sim = gpiosim.Chip(num_lines=4, label="foobar")
self.chip = gpiod.Chip(self.sim.dev_path)
def tearDown(self):
self.chip.close()
self.sim = None
def test_repr(self):
self.assertEqual(repr(self.chip), 'gpiod.Chip("{}")'.format(self.sim.dev_path))
cmp = eval(repr(self.chip))
self.assertEqual(self.chip.path, cmp.path)
def test_str(self):
info = self.chip.get_info()
self.assertEqual(
str(self.chip),
'<Chip path="{}" fd={} info=<ChipInfo name="{}" label="foobar" num_lines=4>>'.format(
self.sim.dev_path, self.chip.fd, info.name
),
)
class StringRepresentationClosed(TestCase):
def setUp(self):
self.sim = gpiosim.Chip(num_lines=4, label="foobar")
self.chip = gpiod.Chip(self.sim.dev_path)
def tearDown(self):
self.sim = None
def test_repr_closed(self):
self.chip.close()
self.assertEqual(repr(self.chip), "<Chip CLOSED>")
def test_str_closed(self):
self.chip.close()
self.assertEqual(str(self.chip), "<Chip CLOSED>")
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