leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

dtoc: Add some tests for the fdt module

Browse Source 
At present this module is tested via the dtoc tests. This is a bit painful
since the tests are at a higher level and so failures are more difficult
to diagnose.

Add some tests that exercise the fdt module directly.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2018-07-06 10:27:24 -06:00
parent ff1fd6ccde
commit 2ba9875312
3 changed files with 257 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
tools/dtoc/fdt.py
View File

@ -138,6 +138,7 @@ class Prop:
else:
return TYPE_INT, val
@classmethod
def GetEmpty(self, type):
"""Get an empty / zero value of the given type
@ -335,12 +336,19 @@ class Fdt:
"""
return self._fdt
def CheckErr(errnum, msg):
def GetFdtObj(self):
"""Get the contents of the FDT
Returns:
The FDT contents as a libfdt.Fdt object
"""
return self._fdt_obj
def CheckErr(self, errnum, msg):
if errnum:
raise ValueError('Error %d: %s: %s' %
(errnum, libfdt.fdt_strerror(errnum), msg))
def GetProps(self, node):
"""Get all properties from a node.

1
tools/dtoc/test_fdt Symbolic link
View File

@ -0,0 +1 @@
test_fdt.py

246
tools/dtoc/test_fdt.py Executable file
View File

@ -0,0 +1,246 @@
#!/usr/bin/python
# SPDX-License-Identifier: GPL-2.0+
# Copyright (c) 2018 Google, Inc
# Written by Simon Glass <sjg@chromium.org>
#
from optparse import OptionParser
import glob
import os
import sys
import unittest
# Bring in the patman libraries
our_path = os.path.dirname(os.path.realpath(__file__))
for dirname in ['../patman', '..']:
sys.path.insert(0, os.path.join(our_path, dirname))
import command
import fdt
from fdt import TYPE_BYTE, TYPE_INT, TYPE_STRING, TYPE_BOOL
from fdt_util import fdt32_to_cpu
import libfdt
import test_util
import tools
class TestFdt(unittest.TestCase):
"""Tests for the Fdt module
This includes unit tests for some functions and functional tests for the fdt
module.
"""
@classmethod
def setUpClass(cls):
tools.PrepareOutputDir(None)
@classmethod
def tearDownClass(cls):
tools._FinaliseForTest()
def setUp(self):
self.dtb = fdt.FdtScan('tools/dtoc/dtoc_test_simple.dts')
def testFdt(self):
"""Test that we can open an Fdt"""
self.dtb.Scan()
root = self.dtb.GetRoot()
self.assertTrue(isinstance(root, fdt.Node))
def testGetNode(self):
"""Test the GetNode() method"""
node = self.dtb.GetNode('/spl-test')
self.assertTrue(isinstance(node, fdt.Node))
node = self.dtb.GetNode('/i2c@0/pmic@9')
self.assertTrue(isinstance(node, fdt.Node))
self.assertEqual('pmic@9', node.name)
def testFlush(self):
"""Check that we can flush the device tree out to its file"""
fname = self.dtb._fname
with open(fname) as fd:
data = fd.read()
os.remove(fname)
with self.assertRaises(IOError):
open(fname)
self.dtb.Flush()
with open(fname) as fd:
data = fd.read()
def testPack(self):
"""Test that packing a device tree works"""
self.dtb.Pack()
def testGetFdt(self):
"""Tetst that we can access the raw device-tree data"""
self.assertTrue(isinstance(self.dtb.GetFdt(), bytearray))
def testGetProps(self):
"""Tests obtaining a list of properties"""
node = self.dtb.GetNode('/spl-test')
props = self.dtb.GetProps(node)
self.assertEqual(['boolval', 'bytearray', 'byteval', 'compatible',
'intarray', 'intval', 'longbytearray',
'stringarray', 'stringval', 'u-boot,dm-pre-reloc'],
sorted(props.keys()))
def testCheckError(self):
"""Tests the ChecKError() function"""
with self.assertRaises(ValueError) as e:
self.dtb.CheckErr(-libfdt.NOTFOUND, 'hello')
self.assertIn('FDT_ERR_NOTFOUND: hello', str(e.exception))
class TestNode(unittest.TestCase):
"""Test operation of the Node class"""
@classmethod
def setUpClass(cls):
tools.PrepareOutputDir(None)
@classmethod
def tearDownClass(cls):
tools._FinaliseForTest()
def setUp(self):
self.dtb = fdt.FdtScan('tools/dtoc/dtoc_test_simple.dts')
self.node = self.dtb.GetNode('/spl-test')
def testOffset(self):
"""Tests that we can obtain the offset of a node"""
self.assertTrue(self.node.Offset() > 0)
def testDelete(self):
"""Tests that we can delete a property"""
node2 = self.dtb.GetNode('/spl-test2')
offset1 = node2.Offset()
self.node.DeleteProp('intval')
offset2 = node2.Offset()
self.assertTrue(offset2 < offset1)
self.node.DeleteProp('intarray')
offset3 = node2.Offset()
self.assertTrue(offset3 < offset2)
def testFindNode(self):
"""Tests that we can find a node using the _FindNode() functoin"""
node = self.dtb.GetRoot()._FindNode('i2c@0')
self.assertEqual('i2c@0', node.name)
subnode = node._FindNode('pmic@9')
self.assertEqual('pmic@9', subnode.name)
class TestProp(unittest.TestCase):
"""Test operation of the Prop class"""
@classmethod
def setUpClass(cls):
tools.PrepareOutputDir(None)
@classmethod
def tearDownClass(cls):
tools._FinaliseForTest()
def setUp(self):
self.dtb = fdt.FdtScan('tools/dtoc/dtoc_test_simple.dts')
self.node = self.dtb.GetNode('/spl-test')
self.fdt = self.dtb.GetFdtObj()
def testGetEmpty(self):
"""Tests the GetEmpty() function for the various supported types"""
self.assertEqual(True, fdt.Prop.GetEmpty(fdt.TYPE_BOOL))
self.assertEqual(chr(0), fdt.Prop.GetEmpty(fdt.TYPE_BYTE))
self.assertEqual(chr(0) * 4, fdt.Prop.GetEmpty(fdt.TYPE_INT))
self.assertEqual('', fdt.Prop.GetEmpty(fdt.TYPE_STRING))
def testGetOffset(self):
"""Test we can get the offset of a property"""
prop = self.node.props['longbytearray']
# Add 12, which is sizeof(struct fdt_property), to get to start of data
offset = prop.GetOffset() + 12
data = self.dtb._fdt[offset:offset + len(prop.value)]
bytes = [chr(x) for x in data]
self.assertEqual(bytes, prop.value)
def testWiden(self):
"""Test widening of values"""
node2 = self.dtb.GetNode('/spl-test2')
prop = self.node.props['intval']
# No action
prop2 = node2.props['intval']
prop.Widen(prop2)
self.assertEqual(fdt.TYPE_INT, prop.type)
self.assertEqual(1, fdt32_to_cpu(prop.value))
# Convert singla value to array
prop2 = self.node.props['intarray']
prop.Widen(prop2)
self.assertEqual(fdt.TYPE_INT, prop.type)
self.assertTrue(isinstance(prop.value, list))
# A 4-byte array looks like a single integer. When widened by a longer
# byte array, it should turn into an array.
prop = self.node.props['longbytearray']
prop2 = node2.props['longbytearray']
self.assertFalse(isinstance(prop2.value, list))
self.assertEqual(4, len(prop2.value))
prop2.Widen(prop)
self.assertTrue(isinstance(prop2.value, list))
self.assertEqual(9, len(prop2.value))
# Similarly for a string array
prop = self.node.props['stringval']
prop2 = node2.props['stringarray']
self.assertFalse(isinstance(prop.value, list))
self.assertEqual(7, len(prop.value))
prop.Widen(prop2)
self.assertTrue(isinstance(prop.value, list))
self.assertEqual(3, len(prop.value))
# Enlarging an existing array
prop = self.node.props['stringarray']
prop2 = node2.props['stringarray']
self.assertTrue(isinstance(prop.value, list))
self.assertEqual(2, len(prop.value))
prop.Widen(prop2)
self.assertTrue(isinstance(prop.value, list))
self.assertEqual(3, len(prop.value))
def RunTests(args):
"""Run all the test we have for the fdt model
Args:
args: List of positional args provided to fdt. This can hold a test
name to execute (as in 'fdt -t testFdt', for example)
"""
result = unittest.TestResult()
sys.argv = [sys.argv[0]]
test_name = args and args[0] or None
for module in (TestFdt, TestNode, TestProp):
if test_name:
try:
suite = unittest.TestLoader().loadTestsFromName(test_name, module)
except AttributeError:
continue
else:
suite = unittest.TestLoader().loadTestsFromTestCase(module)
suite.run(result)
print result
for _, err in result.errors:
print err
for _, err in result.failures:
print err
if __name__ != '__main__':
sys.exit(1)
parser = OptionParser()
parser.add_option('-t', '--test', action='store_true', dest='test',
default=False, help='run tests')
(options, args) = parser.parse_args()
# Run our meagre tests
if options.test:
RunTests(args)