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Add tests for pylorax.imgutils 

Some of these can only run as root on a real system with access to loop
devices. They are skipped when running in a container.
This commit is contained in:
Brian C. Lane 2018-11-07 16:46:54 -08:00
parent bab4b20d0d
commit 063a1770e1
5 changed files with 232 additions and 0 deletions
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1
Dockerfile.test
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@ -27,6 +27,7 @@ RUN dnf -y install \
xz-lzma-compat \
pbzip2 \
squashfs-tools \
qemu-img \
which && \
touch /.in-container
RUN useradd weldr

2
lorax.spec
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@ -37,8 +37,10 @@ Requires: module-init-tools
Requires: parted
Requires: squashfs-tools >= 4.2
Requires: util-linux
Requires: xz-lzma-compat
Requires: xz
Requires: pigz
Requires: pbzip2
Requires: dracut >= 030
Requires: kpartx

15
tests/lib.py
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@ -16,6 +16,7 @@
#
import sys
from contextlib import contextmanager
import magic
from io import StringIO
@contextmanager
@ -27,3 +28,17 @@ def captured_output():
yield sys.stdout, sys.stderr
finally:
sys.stdout, sys.stderr = old_out, old_err
def get_file_magic(filename):
"""Get the file type details using libmagic
Returns "" on failure or a string containing the description of the file
"""
details = ""
try:
ms = magic.open(magic.NONE)
ms.load()
details = ms.file(filename)
finally:
ms.close()
return details

0
tests/pylorax/__init__.py Normal file
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214
tests/pylorax/test_imgutils.py Normal file
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@ -0,0 +1,214 @@
#
# Copyright (C) 2018 Red Hat, Inc.
#
# This program 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 program 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 program. If not, see <http://www.gnu.org/licenses/>.
#
import os
import tempfile
import unittest
from ..lib import get_file_magic
from pylorax.executils import runcmd
from pylorax.imgutils import mkcpio, mktar, mksquashfs, mksparse, mkqcow2, loop_attach, loop_detach
from pylorax.imgutils import get_loop_name, LoopDev, dm_attach, dm_detach, DMDev, Mount
from pylorax.imgutils import mkdosimg, mkext4img, mkbtrfsimg, mkhfsimg, default_image_name
from pylorax.sysutils import joinpaths
def mkfakerootdir(rootdir):
"""Populate a fake rootdir with a few directories and files
:param rootdir: An existing directory to create files/dirs under
:type rootdir: str
Use this for testing the mk* functions that compress a directory tree
"""
dirs = ["/root", "/usr/sbin/", "/usr/local/", "/home/bart", "/etc/"]
files = ["/etc/passwd", "/home/bart/.bashrc", "/root/.bashrc"]
for d in dirs:
os.makedirs(joinpaths(rootdir, d))
for f in files:
if not os.path.isdir(joinpaths(rootdir, os.path.dirname(f))):
os.makedirs(joinpaths(rootdir, os.path.dirname(f)))
open(joinpaths(rootdir, f), "w").write("I AM FAKE FILE %s" % f.upper())
class ImgUtilsTest(unittest.TestCase):
def mkcpio_test(self):
"""Test mkcpio function"""
with tempfile.TemporaryDirectory(prefix="lorax.test.") as work_dir:
with tempfile.NamedTemporaryFile(prefix="lorax.test.disk.") as disk_img:
mkfakerootdir(work_dir)
mkcpio(work_dir, disk_img.name, compression=None)
self.assertTrue(os.path.exists(disk_img.name))
file_details = get_file_magic(disk_img.name)
self.assertTrue("cpio" in file_details, file_details)
def mktar_test(self):
"""Test mktar function"""
with tempfile.TemporaryDirectory(prefix="lorax.test.") as work_dir:
with tempfile.NamedTemporaryFile(prefix="lorax.test.disk.") as disk_img:
mkfakerootdir(work_dir)
mktar(work_dir, disk_img.name, compression=None)
self.assertTrue(os.path.exists(disk_img.name))
file_details = get_file_magic(disk_img.name)
self.assertTrue("POSIX tar" in file_details, file_details)
def compressed_mktar_test(self):
"""Test compressed mktar function"""
with tempfile.TemporaryDirectory(prefix="lorax.test.") as work_dir:
with tempfile.NamedTemporaryFile(prefix="lorax.test.disk.") as disk_img:
mkfakerootdir(work_dir)
for (compression, magic) in [("xz", "XZ compressed"),
("lzma", "LZMA compressed"),
("gzip", "gzip compressed"),
("bzip2", "bzip2 compressed")]:
os.unlink(disk_img.name)
mktar(work_dir, disk_img.name, compression=compression)
self.assertTrue(os.path.exists(disk_img.name))
file_details = get_file_magic(disk_img.name)
self.assertTrue(magic in file_details, (compression, magic, file_details))
def mksquashfs_test(self):
"""Test mksquashfs function"""
with tempfile.TemporaryDirectory(prefix="lorax.test.") as work_dir:
with tempfile.NamedTemporaryFile(prefix="lorax.test.disk.") as disk_img:
mkfakerootdir(work_dir)
disk_img.close()
mksquashfs(work_dir, disk_img.name)
self.assertTrue(os.path.exists(disk_img.name))
file_details = get_file_magic(disk_img.name)
self.assertTrue("Squashfs" in file_details, file_details)
def mksparse_test(self):
"""Test mksparse function"""
with tempfile.NamedTemporaryFile(prefix="lorax.test.disk.") as disk_img:
mksparse(disk_img.name, 42 * 1024**2)
self.assertEqual(os.stat(disk_img.name).st_size, 42 * 1024**2)
def mkqcow2_test(self):
"""Test mkqcow2 function"""
with tempfile.NamedTemporaryFile(prefix="lorax.test.disk.") as disk_img:
mkqcow2(disk_img.name, 42 * 1024**2)
file_details = get_file_magic(disk_img.name)
self.assertTrue("QEMU QCOW" in file_details, file_details)
self.assertTrue(str(42 * 1024**2) in file_details, file_details)
@unittest.skipUnless(os.geteuid() == 0 and not os.path.exists("/.in-container"), "requires root privileges, and no containers")
def loop_test(self):
"""Test the loop_* functions (requires loop support)"""
with tempfile.NamedTemporaryFile(prefix="lorax.test.disk.") as disk_img:
mksparse(disk_img.name, 42 * 1024**2)
loop_dev = loop_attach(disk_img.name)
try:
self.assertTrue(loop_dev is not None)
self.assertEqual(loop_dev[5:], get_loop_name(disk_img.name))
finally:
loop_detach(loop_dev)
@unittest.skipUnless(os.geteuid() == 0 and not os.path.exists("/.in-container"), "requires root privileges, and no containers")
def loop_context_test(self):
"""Test the LoopDev context manager (requires loop)"""
with tempfile.NamedTemporaryFile(prefix="lorax.test.disk.") as disk_img:
mksparse(disk_img.name, 42 * 1024**2)
with LoopDev(disk_img.name) as loop_dev:
self.assertTrue(loop_dev is not None)
self.assertEqual(loop_dev[5:], get_loop_name(disk_img.name))
@unittest.skipUnless(os.geteuid() == 0 and not os.path.exists("/.in-container"), "requires root privileges, and no containers")
def dm_test(self):
"""Test the dm_* functions (requires device-mapper support)"""
with tempfile.NamedTemporaryFile(prefix="lorax.test.disk.") as disk_img:
mksparse(disk_img.name, 42 * 1024**2)
with LoopDev(disk_img.name) as loop_dev:
self.assertTrue(loop_dev is not None)
dm_name = dm_attach(loop_dev, 42 * 1024**2)
try:
self.assertTrue(dm_name is not None)
finally:
dm_detach(dm_name)
@unittest.skipUnless(os.geteuid() == 0 and not os.path.exists("/.in-container"), "requires root privileges, and no containers")
def dmdev_test(self):
"""Test the DMDev context manager (requires device-mapper support)"""
with tempfile.NamedTemporaryFile(prefix="lorax.test.disk.") as disk_img:
mksparse(disk_img.name, 42 * 1024**2)
with LoopDev(disk_img.name) as loop_dev:
self.assertTrue(loop_dev is not None)
with DMDev(loop_dev, 42 * 1024**2) as dm_name:
self.assertTrue(dm_name is not None)
@unittest.skipUnless(os.geteuid() == 0 and not os.path.exists("/.in-container"), "requires root privileges, and no containers")
def mount_test(self):
"""Test the Mount context manager (requires loop)"""
with tempfile.NamedTemporaryFile(prefix="lorax.test.disk.") as disk_img:
mksparse(disk_img.name, 42 * 1024**2)
runcmd(["mkfs.ext4", "-L", "Anaconda", "-b", "4096", "-m", "0", disk_img.name])
with LoopDev(disk_img.name) as loopdev:
self.assertTrue(loopdev is not None)
with Mount(loopdev) as mnt:
self.assertTrue(mnt is not None)
@unittest.skipUnless(os.geteuid() == 0 and not os.path.exists("/.in-container"), "requires root privileges, and no containers")
def mkdosimg_test(self):
"""Test mkdosimg function (requires loop)"""
with tempfile.TemporaryDirectory(prefix="lorax.test.") as work_dir:
with tempfile.NamedTemporaryFile(prefix="lorax.test.disk.") as disk_img:
mkfakerootdir(work_dir)
mkdosimg(work_dir, disk_img.name)
self.assertTrue(os.path.exists(disk_img.name))
file_details = get_file_magic(disk_img.name)
self.assertTrue("FAT " in file_details, file_details)
@unittest.skipUnless(os.geteuid() == 0 and not os.path.exists("/.in-container"), "requires root privileges, and no containers")
def mkext4img_test(self):
"""Test mkext4img function (requires loop)"""
with tempfile.TemporaryDirectory(prefix="lorax.test.") as work_dir:
with tempfile.NamedTemporaryFile(prefix="lorax.test.disk.") as disk_img:
mkfakerootdir(work_dir)
mkext4img(work_dir, disk_img.name)
self.assertTrue(os.path.exists(disk_img.name))
file_details = get_file_magic(disk_img.name)
self.assertTrue("ext2 filesystem" in file_details, file_details)
@unittest.skipUnless(os.geteuid() == 0 and not os.path.exists("/.in-container"), "requires root privileges, and no containers")
def mkbtrfsimg_test(self):
"""Test mkbtrfsimg function (requires loop)"""
with tempfile.TemporaryDirectory(prefix="lorax.test.") as work_dir:
with tempfile.NamedTemporaryFile(prefix="lorax.test.disk.") as disk_img:
mkfakerootdir(work_dir)
mkbtrfsimg(work_dir, disk_img.name)
self.assertTrue(os.path.exists(disk_img.name))
file_details = get_file_magic(disk_img.name)
self.assertTrue("BTRFS Filesystem" in file_details, file_details)
@unittest.skipUnless(os.geteuid() == 0 and not os.path.exists("/.in-container"), "requires root privileges, and no containers")
def mkhfsimg_test(self):
"""Test mkhfsimg function (requires loop)"""
with tempfile.TemporaryDirectory(prefix="lorax.test.") as work_dir:
with tempfile.NamedTemporaryFile(prefix="lorax.test.disk.") as disk_img:
mkfakerootdir(work_dir)
mkhfsimg(work_dir, disk_img.name, label="test")
self.assertTrue(os.path.exists(disk_img.name))
file_details = get_file_magic(disk_img.name)
self.assertTrue("Macintosh HFS" in file_details, file_details)
def default_image_name_test(self):
"""Test default_image_name function"""
for compression, suffix in [("xz", ".xz"), ("gzip", ".gz"), ("bzip2", ".bz2"), ("lzma", ".lzma")]:
filename = default_image_name(compression, "foobar")
self.assertTrue(filename.endswith(suffix))