Add a set of tests to cover the functionality in pylibfdt.
Signed-off-by: Simon Glass <sjg@xxxxxxxxxxxx>
---
Changes in v6:
- Adjust tests to avoid checking a hard-coded offset
- Use 0 instead of self.fdt.path_offset('/')
- Adjust the totalsize() test to compare against the file size
- Adjust test result processing to avoid using awk
Changes in v5:
- Adjust tests to match new swig bindings
Changes in v4:
- Drop tests that are no-longer applicable
- Add a get for getprop()
Changes in v3:
- Add some more tests
Changes in v2:
- Update tests for new pylibfdt
- Add a few more tests to increase coverage
tests/pylibfdt_tests.py | 265 ++++++++++++++++++++++++++++++++++++++++++++++++
tests/run_tests.sh | 16 ++-
2 files changed, 280 insertions(+), 1 deletion(-)
create mode 100644 tests/pylibfdt_tests.py
diff --git a/tests/pylibfdt_tests.py b/tests/pylibfdt_tests.py
new file mode 100644
index 0000000..06256c5
--- /dev/null
+++ b/tests/pylibfdt_tests.py
@@ -0,0 +1,265 @@
+# pylibfdt - Tests for Flat Device Tree manipulation in Python
+# Copyright (C) 2017 Google, Inc.
+# Written by Simon Glass <sjg@xxxxxxxxxxxx>
+#
+# libfdt is dual licensed: you can use it either under the terms of
+# the GPL, or the BSD license, at your option.
+#
+# a) This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of the
+# License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public
+# License along with this library; if not, write to the Free
+# Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+# MA 02110-1301 USA
+#
+# Alternatively,
+#
+# b) Redistribution and use in source and binary forms, with or
+# without modification, are permitted provided that the following
+# conditions are met:
+#
+# 1. Redistributions of source code must retain the above
+# copyright notice, this list of conditions and the following
+# disclaimer.
+# 2. Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following
+# disclaimer in the documentation and/or other materials
+# provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+# CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+import sys
+import unittest
+
+sys.path.append('../pylibfdt')
+import libfdt
+from libfdt import FdtException, QUIET_NOTFOUND
+
+# Offsets of properties in the root node
+ROOT_PROPS = (8, 32, 48, 68, 92, 108)
+
+def get_err(err_code):
+ """Convert an error code into an error message
+
+ Args:
+ err_code: Error code value (FDT_ERR_...)
+
+ Returns:
+ String error code
+ """
+ return 'pylibfdt error %d: %s' % (-err_code, libfdt.fdt_strerror(-err_code))
+
+def _ReadFdt(fname):
+ """Read a device tree file into an Fdt object, ready for use
+
+ Args:
+ fname: Filename to read from
+
+ Returns:
+ Fdt bytearray suitable for passing to libfdt functions
+ """
+ return libfdt.Fdt(open(fname).read())
+
+class PyLibfdtTests(unittest.TestCase):
+ """Test class for pylibfdt
+
+ Properties:
+ fdt: Device tree file used for testing
+ """
+
+ def setUp(self):
+ """Read in the device tree we use for testing"""
+ self.fdt = _ReadFdt('test_tree1.dtb')
+
+ def GetPropList(self, node_path):
+ """Read a list of properties from a node
+
+ Args:
+ node_path: Full path to node, e.g. '/subnode@1/subsubnode'
+
+ Returns:
+ List of property names for that node, e.g. ['compatible', 'reg']
+ """
+ prop_list = []
+ node = self.fdt.path_offset(node_path)
+ poffset = self.fdt.first_property_offset(node, QUIET_NOTFOUND)
+ while poffset > 0:
+ prop = self.fdt.get_property_by_offset(poffset)
+ prop_list.append(prop.name)
+ poffset = self.fdt.next_property_offset(poffset, QUIET_NOTFOUND)
+ return prop_list
+
+ def testImport(self):
+ """Check that we can import the library correctly"""
+ self.assertEquals(type(libfdt), type(sys))
+
+ def testBadFdt(self):
+ """Check that a filename provided accidentally is not accepted"""
+ with self.assertRaisesRegexp(FdtException, get_err(libfdt.BADMAGIC)):
+ fdt = libfdt.Fdt('a string')
+
+ def testPathOffset(self):
+ """Check that we can find the offset of a node"""
+ self.assertEquals(self.fdt.path_offset('/'), 0)
+ self.assertTrue(self.fdt.path_offset('/subnode@1') > 0)
+ with self.assertRaisesRegexp(FdtException, get_err(libfdt.NOTFOUND)):
+ self.fdt.path_offset('/wibble')
+ self.assertEquals(self.fdt.path_offset('/wibble', QUIET_NOTFOUND),
+ -libfdt.NOTFOUND)
+
+ def testPropertyOffset(self):
+ """Walk through all the properties in the root node"""
+ self.assertEquals(self.fdt.first_property_offset(0), ROOT_PROPS[0])
+ for pos in range(len(ROOT_PROPS) - 1):
+ self.assertEquals(self.fdt.next_property_offset(ROOT_PROPS[pos]),
+ ROOT_PROPS[pos + 1])
+ self.assertEquals(self.fdt.next_property_offset(ROOT_PROPS[-1],
+ QUIET_NOTFOUND),
+ -libfdt.NOTFOUND)
+
+ def testPropertyOffsetExceptions(self):
+ """Check that exceptions are raised as expected"""
+ with self.assertRaisesRegexp(FdtException, get_err(libfdt.BADOFFSET)):
+ self.fdt.next_property_offset(107)
+ with self.assertRaisesRegexp(FdtException, get_err(libfdt.BADOFFSET)):
+ self.fdt.first_property_offset(107, QUIET_NOTFOUND)
+ with self.assertRaisesRegexp(FdtException, get_err(libfdt.BADOFFSET)):
+ self.fdt.next_property_offset(107, QUIET_NOTFOUND)
+
+ node = self.fdt.path_offset('/subnode@1/ss1')
+ self.assertEquals(self.fdt.first_property_offset(node, QUIET_NOTFOUND),
+ -libfdt.NOTFOUND)
+ with self.assertRaisesRegexp(FdtException, get_err(libfdt.NOTFOUND)):
+ self.fdt.first_property_offset(node)
+
+ def testGetName(self):
+ """Check that we can get the name of a node"""
+ self.assertEquals(self.fdt.get_name(0), '')
+ node = self.fdt.path_offset('/subnode@1/subsubnode')
+ self.assertEquals(self.fdt.get_name(node), 'subsubnode')
+
+ with self.assertRaisesRegexp(FdtException, get_err(libfdt.BADOFFSET)):
+ self.fdt.get_name(-2)
+
+ def testGetPropertyByOffset(self):
+ """Check that we can read the name and contents of a property"""
+ root = 0
+ poffset = self.fdt.first_property_offset(root)
+ prop = self.fdt.get_property_by_offset(poffset)
+ self.assertEquals(prop.name, 'compatible')
+ self.assertEquals(prop.value, 'test_tree1\0')
+
+ with self.assertRaisesRegexp(FdtException, get_err(libfdt.BADOFFSET)):
+ self.fdt.get_property_by_offset(-2)
+ self.assertEquals(
+ -libfdt.BADOFFSET,
+ self.fdt.get_property_by_offset(-2, [libfdt.BADOFFSET]))
+
+ def testGetProp(self):
+ """Check that we can read the contents of a property by name"""
+ root = self.fdt.path_offset('/')
+ value = self.fdt.getprop(root, "compatible")
+ self.assertEquals(value, 'test_tree1\0')
+ self.assertEquals(-libfdt.NOTFOUND, self.fdt.getprop(root, 'missing',
+ QUIET_NOTFOUND))
+
+ with self.assertRaisesRegexp(FdtException, get_err(libfdt.NOTFOUND)):
+ self.fdt.getprop(root, 'missing')
+
+ node = self.fdt.path_offset('/subnode@1/subsubnode')
+ value = self.fdt.getprop(node, "compatible")
+ self.assertEquals(value, 'subsubnode1\0subsubnode\0')
+
+ def testStrError(self):
+ """Check that we can get an error string"""
+ self.assertEquals(libfdt.strerror(-libfdt.NOTFOUND),
+ 'FDT_ERR_NOTFOUND')
+
+ def testFirstNextSubnodeOffset(self):
+ """Check that we can walk through subnodes"""
+ node_list = []
+ node = self.fdt.first_subnode(0, QUIET_NOTFOUND)
+ while node >= 0:
+ node_list.append(self.fdt.get_name(node))
+ node = self.fdt.next_subnode(node, QUIET_NOTFOUND)
+ self.assertEquals(node_list, ['subnode@1', 'subnode@2'])
+
+ def testFirstNextSubnodeOffsetExceptions(self):
+ """Check except handling for first/next subnode functions"""
+ node = self.fdt.path_offset('/subnode@1/subsubnode', QUIET_NOTFOUND)
+ self.assertEquals(self.fdt.first_subnode(node, QUIET_NOTFOUND),
+ -libfdt.NOTFOUND)
+ with self.assertRaisesRegexp(FdtException, get_err(libfdt.NOTFOUND)):
+ self.fdt.first_subnode(node)
+
+ node = self.fdt.path_offset('/subnode@1/ss1', QUIET_NOTFOUND)
+ self.assertEquals(self.fdt.next_subnode(node, QUIET_NOTFOUND),
+ -libfdt.NOTFOUND)
+ with self.assertRaisesRegexp(FdtException, get_err(libfdt.NOTFOUND)):
+ self.fdt.next_subnode(node)
+
+ def testDeleteProperty(self):
+ """Test that we can delete a property"""
+ node_name = '/subnode@1'
+ self.assertEquals(self.GetPropList(node_name),
+ ['compatible', 'reg', 'prop-int'])
+ node = self.fdt.path_offset('/%s' % node_name)
+ self.assertEquals(self.fdt.delprop(node, 'reg'), 0)
+ self.assertEquals(self.GetPropList(node_name),
+ ['compatible', 'prop-int'])
+
+ def testHeader(self):
+ """Test that we can access the header values"""
+ self.assertEquals(self.fdt.totalsize(), len(self.fdt._fdt))
+ self.assertEquals(self.fdt.off_dt_struct(), 88)
+
+ def testPack(self):
+ """Test that we can pack the tree after deleting something"""
+ self.assertEquals(self.fdt.totalsize(), 693)
+ node = self.fdt.path_offset('/subnode@2', QUIET_NOTFOUND)
+ self.assertEquals(self.fdt.delprop(node, 'prop-int'), 0)
+ self.assertEquals(self.fdt.totalsize(), 693)
+ self.assertEquals(self.fdt.pack(), 0)
+ self.assertEquals(self.fdt.totalsize(), 677)
+
+ def testBadPropertyOffset(self):
+ """Test that bad property offsets are detected"""
+ with self.assertRaisesRegexp(FdtException, get_err(libfdt.BADOFFSET)):
+ self.fdt.get_property_by_offset(13)
+ with self.assertRaisesRegexp(FdtException, get_err(libfdt.BADOFFSET)):
+ self.fdt.first_property_offset(3)
+ with self.assertRaisesRegexp(FdtException, get_err(libfdt.BADOFFSET)):
+ self.fdt.next_property_offset(3)
+
+ def testBadPathOffset(self):
+ """Test that bad path names are detected"""
+ with self.assertRaisesRegexp(FdtException, get_err(libfdt.BADPATH)):
+ self.fdt.path_offset('not-present')
+
+ def testEndian(self):
+ """Check that we can convert from FDT (big endian) to native endian"""
+ self.assertEquals(libfdt.fdt32_to_cpu(0x10000000), 0x10)
+
+if __name__ == "__main__":
+ unittest.main()
diff --git a/tests/run_tests.sh b/tests/run_tests.sh
index ed489db..76d20d8 100755
--- a/tests/run_tests.sh
+++ b/tests/run_tests.sh
@@ -769,6 +769,17 @@ fdtdump_tests () {
run_fdtdump_test fdtdump.dts
}
+pylibfdt_tests () {
+ TMP=/tmp/tests.stderr.$$
+ python pylibfdt_tests.py 2> ${TMP}
+ result=$(head -1 ${TMP})
+
+ # Extract the test results and add them to our totals
+ tot_fail=$((tot_fail + $(echo $result | tr -d '\n.' | wc -c)))
+ tot_pass=$((tot_pass + $(echo $result | tr -d '\nF' | wc -c)))
+ tot_tests=$((tot_tests + $(echo $result | tr -d '\n' | wc -c)))
+}
+
while getopts "vt:me" ARG ; do
case $ARG in
"v")
@@ -787,7 +798,7 @@ while getopts "vt:me" ARG ; do
done
if [ -z "$TESTSETS" ]; then
- TESTSETS="libfdt utilfdt dtc dtbs_equal fdtget fdtput fdtdump"
+ TESTSETS="libfdt utilfdt dtc dtbs_equal fdtget fdtput fdtdump pylibfdt"
fi
# Make sure we don't have stale blobs lying around
@@ -816,6 +827,9 @@ for set in $TESTSETS; do
"fdtdump")
fdtdump_tests
;;
+ "pylibfdt")
+ pylibfdt_tests
+ ;;
esac
done
--
2.11.0.483.g087da7b7c-goog
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