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# SPDX-License-Identifier: GPL-2.0+
# Copyright 2020 Google LLC
#
"""Tests for the src_scan module
This includes unit tests for scanning of the source code
"""
import os
import shutil
import tempfile
import unittest
from unittest import mock
from dtoc import src_scan
from patman import test_util
from patman import tools
OUR_PATH = os.path.dirname(os.path.realpath(__file__))
class FakeNode:
"""Fake Node object for testing"""
def __init__(self):
self.name = None
self.props = {}
class FakeProp:
"""Fake Prop object for testing"""
def __init__(self):
self.name = None
self.value = None
# This is a test so is allowed to access private things in the module it is
# testing
# pylint: disable=W0212
class TestSrcScan(unittest.TestCase):
"""Tests for src_scan"""
@classmethod
def setUpClass(cls):
tools.PrepareOutputDir(None)
@classmethod
def tearDownClass(cls):
tools.FinaliseOutputDir()
def test_simple(self):
"""Simple test of scanning drivers"""
scan = src_scan.Scanner(None, True, None)
scan.scan_drivers()
self.assertIn('sandbox_gpio', scan._drivers)
self.assertIn('sandbox_gpio_alias', scan._driver_aliases)
self.assertEqual('sandbox_gpio',
scan._driver_aliases['sandbox_gpio_alias'])
self.assertNotIn('sandbox_gpio_alias2', scan._driver_aliases)
def test_additional(self):
"""Test with additional drivers to scan"""
scan = src_scan.Scanner(
None, True, [None, '', 'tools/dtoc/dtoc_test_scan_drivers.cxx'])
scan.scan_drivers()
self.assertIn('sandbox_gpio_alias2', scan._driver_aliases)
self.assertEqual('sandbox_gpio',
scan._driver_aliases['sandbox_gpio_alias2'])
def test_unicode_error(self):
"""Test running dtoc with an invalid unicode file
To be able to perform this test without adding a weird text file which
would produce issues when using checkpatch.pl or patman, generate the
file at runtime and then process it.
"""
driver_fn = '/tmp/' + next(tempfile._get_candidate_names())
with open(driver_fn, 'wb+') as fout:
fout.write(b'\x81')
scan = src_scan.Scanner(None, True, [driver_fn])
with test_util.capture_sys_output() as (stdout, _):
scan.scan_drivers()
self.assertRegex(stdout.getvalue(),
r"Skipping file '.*' due to unicode error\s*")
def test_driver(self):
"""Test the Driver class"""
i2c = 'I2C_UCLASS'
compat = {'rockchip,rk3288-grf': 'ROCKCHIP_SYSCON_GRF',
'rockchip,rk3288-srf': None}
drv1 = src_scan.Driver('fred', 'fred.c')
drv2 = src_scan.Driver('mary', 'mary.c')
drv3 = src_scan.Driver('fred', 'fred.c')
drv1.uclass_id = i2c
drv1.compat = compat
drv2.uclass_id = i2c
drv2.compat = compat
drv3.uclass_id = i2c
drv3.compat = compat
self.assertEqual(
"Driver(name='fred', uclass_id='I2C_UCLASS', "
"compat={'rockchip,rk3288-grf': 'ROCKCHIP_SYSCON_GRF', "
"'rockchip,rk3288-srf': None}, priv=)", str(drv1))
self.assertEqual(drv1, drv3)
self.assertNotEqual(drv1, drv2)
self.assertNotEqual(drv2, drv3)
def test_scan_dirs(self):
"""Test scanning of source directories"""
def add_file(fname):
pathname = os.path.join(indir, fname)
dirname = os.path.dirname(pathname)
os.makedirs(dirname, exist_ok=True)
tools.WriteFile(pathname, '', binary=False)
fname_list.append(pathname)
try:
indir = tempfile.mkdtemp(prefix='dtoc.')
fname_list = []
add_file('fname.c')
add_file('.git/ignoreme.c')
add_file('dir/fname2.c')
add_file('build-sandbox/ignoreme2.c')
# Mock out scan_driver and check that it is called with the
# expected files
with mock.patch.object(src_scan.Scanner, "scan_driver") as mocked:
scan = src_scan.Scanner(indir, True, None)
scan.scan_drivers()
self.assertEqual(2, len(mocked.mock_calls))
self.assertEqual(mock.call(fname_list[0]),
mocked.mock_calls[0])
# .git file should be ignored
self.assertEqual(mock.call(fname_list[2]),
mocked.mock_calls[1])
finally:
shutil.rmtree(indir)
def test_scan(self):
"""Test scanning of a driver"""
fname = os.path.join(OUR_PATH, '..', '..', 'drivers/i2c/tegra_i2c.c')
buff = tools.ReadFile(fname, False)
scan = src_scan.Scanner(None, False, None)
scan._parse_driver(fname, buff)
self.assertIn('i2c_tegra', scan._drivers)
drv = scan._drivers['i2c_tegra']
self.assertEqual('i2c_tegra', drv.name)
self.assertEqual('UCLASS_I2C', drv.uclass_id)
self.assertEqual(
{'nvidia,tegra114-i2c': 'TYPE_114',
'nvidia,tegra20-i2c': 'TYPE_STD',
'nvidia,tegra20-i2c-dvc': 'TYPE_DVC'}, drv.compat)
self.assertEqual('i2c_bus', drv.priv)
self.assertEqual(1, len(scan._drivers))
def test_normalized_name(self):
"""Test operation of get_normalized_compat_name()"""
prop = FakeProp()
prop.name = 'compatible'
prop.value = 'rockchip,rk3288-grf'
node = FakeNode()
node.props = {'compatible': prop}
scan = src_scan.Scanner(None, False, None)
with test_util.capture_sys_output() as (stdout, _):
name, aliases = scan.get_normalized_compat_name(node)
self.assertEqual('rockchip_rk3288_grf', name)
self.assertEqual([], aliases)
self.assertEqual(
'WARNING: the driver rockchip_rk3288_grf was not found in the driver list',
stdout.getvalue().strip())
i2c = 'I2C_UCLASS'
compat = {'rockchip,rk3288-grf': 'ROCKCHIP_SYSCON_GRF',
'rockchip,rk3288-srf': None}
drv = src_scan.Driver('fred', 'fred.c')
drv.uclass_id = i2c
drv.compat = compat
scan._drivers['rockchip_rk3288_grf'] = drv
scan._driver_aliases['rockchip_rk3288_srf'] = 'rockchip_rk3288_grf'
with test_util.capture_sys_output() as (stdout, _):
name, aliases = scan.get_normalized_compat_name(node)
self.assertEqual('', stdout.getvalue().strip())
self.assertEqual('rockchip_rk3288_grf', name)
self.assertEqual([], aliases)
prop.value = 'rockchip,rk3288-srf'
with test_util.capture_sys_output() as (stdout, _):
name, aliases = scan.get_normalized_compat_name(node)
self.assertEqual('', stdout.getvalue().strip())
self.assertEqual('rockchip_rk3288_grf', name)
self.assertEqual(['rockchip_rk3288_srf'], aliases)
def test_scan_errors(self):
"""Test detection of scanning errors"""
buff = '''
static const struct udevice_id tegra_i2c_ids2[] = {
{ .compatible = "nvidia,tegra114-i2c", .data = TYPE_114 },
{ }
};
U_BOOT_DRIVER(i2c_tegra) = {
.name = "i2c_tegra",
.id = UCLASS_I2C,
.of_match = tegra_i2c_ids,
};
'''
scan = src_scan.Scanner(None, False, None)
with self.assertRaises(ValueError) as exc:
scan._parse_driver('file.c', buff)
self.assertIn(
"file.c: Unknown compatible var 'tegra_i2c_ids' (found: tegra_i2c_ids2)",
str(exc.exception))
def test_of_match(self):
"""Test detection of of_match_ptr() member"""
buff = '''
static const struct udevice_id tegra_i2c_ids[] = {
{ .compatible = "nvidia,tegra114-i2c", .data = TYPE_114 },
{ }
};
U_BOOT_DRIVER(i2c_tegra) = {
.name = "i2c_tegra",
.id = UCLASS_I2C,
.of_match = of_match_ptr(tegra_i2c_ids),
};
'''
scan = src_scan.Scanner(None, False, None)
scan._parse_driver('file.c', buff)
self.assertIn('i2c_tegra', scan._drivers)
drv = scan._drivers['i2c_tegra']
self.assertEqual('i2c_tegra', drv.name)
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