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import unittest
import os
import overrides_hack
from utils import create_sparse_tempfile, create_lio_device, delete_lio_device, fake_utils, fake_path, run_command
from gi.repository import BlockDev, GLib
class SwapTest(unittest.TestCase):
requested_plugins = BlockDev.plugin_specs_from_names(("swap",))
@classmethod
def setUpClass(cls):
if not BlockDev.is_initialized():
BlockDev.init(cls.requested_plugins, None)
else:
BlockDev.reinit(cls.requested_plugins, True, None)
class SwapTestCase(SwapTest):
def setUp(self):
self.addCleanup(self._clean_up)
self.dev_file = create_sparse_tempfile("swap_test", 1024**3)
try:
self.loop_dev = create_lio_device(self.dev_file)
except RuntimeError as e:
raise RuntimeError("Failed to setup loop device for testing: %s" % e)
def _clean_up(self):
try:
BlockDev.swap_swapoff(self.loop_dev)
except:
pass
try:
delete_lio_device(self.loop_dev)
except RuntimeError:
# just move on, we can do no better here
pass
os.unlink(self.dev_file)
def test_all(self):
"""Verify that swap_* functions work as expected"""
with self.assertRaises(GLib.GError):
BlockDev.swap_mkswap("/non/existing/device", None, None)
with self.assertRaises(GLib.GError):
BlockDev.swap_swapon("/non/existing/device", -1)
with self.assertRaises(GLib.GError):
BlockDev.swap_swapoff("/non/existing/device")
self.assertFalse(BlockDev.swap_swapstatus("/non/existing/device"))
# not a swap device (yet)
with self.assertRaises(GLib.GError):
BlockDev.swap_swapon(self.loop_dev, -1)
with self.assertRaises(GLib.GError):
BlockDev.swap_swapoff(self.loop_dev)
on = BlockDev.swap_swapstatus(self.loop_dev)
self.assertFalse(on)
# the common/expected sequence of calls
succ = BlockDev.swap_mkswap(self.loop_dev, None, None)
self.assertTrue(succ)
succ = BlockDev.swap_set_label(self.loop_dev, "BlockDevSwap")
self.assertTrue(succ)
_ret, out, _err = run_command("blkid -ovalue -sLABEL -p %s" % self.loop_dev)
self.assertEqual(out, "BlockDevSwap")
succ = BlockDev.swap_swapon(self.loop_dev, -1)
self.assertTrue(succ)
on = BlockDev.swap_swapstatus(self.loop_dev)
self.assertTrue(on)
succ = BlockDev.swap_swapoff(self.loop_dev)
self.assertTrue(succ)
# already off
with self.assertRaises(GLib.GError):
BlockDev.swap_swapoff(self.loop_dev)
on = BlockDev.swap_swapstatus(self.loop_dev)
self.assertFalse(on)
def test_mkswap_with_label(self):
"""Verify that mkswap with label works as expected"""
succ = BlockDev.swap_mkswap(self.loop_dev, "BlockDevSwap", None)
self.assertTrue(succ)
_ret, out, _err = run_command("blkid -ovalue -sLABEL -p %s" % self.loop_dev)
self.assertEqual(out, "BlockDevSwap")
class SwapUnloadTest(SwapTest):
def setUp(self):
# make sure the library is initialized with all plugins loaded for other
# tests
self.addCleanup(BlockDev.reinit, self.requested_plugins, True, None)
def test_check_low_version(self):
"""Verify that checking the minimum swap utils versions works as expected"""
# unload all plugins first
self.assertTrue(BlockDev.reinit([], True, None))
with fake_utils("tests/swap_low_version/"):
# too low version of mkswap available, the swap plugin should fail to load
with self.assertRaises(GLib.GError):
BlockDev.reinit(self.requested_plugins, True, None)
self.assertNotIn("swap", BlockDev.get_available_plugin_names())
# load the plugins back
self.assertTrue(BlockDev.reinit(self.requested_plugins, True, None))
self.assertIn("swap", BlockDev.get_available_plugin_names())
def test_check_no_mkswap(self):
"""Verify that checking mkswap and swaplabel tools availability
works as expected
"""
# unload all plugins first
self.assertTrue(BlockDev.reinit([], True, None))
with fake_path(all_but="mkswap"):
# no mkswap available, the swap plugin should fail to load
with self.assertRaises(GLib.GError):
BlockDev.reinit(self.requested_plugins, True, None)
self.assertNotIn("swap", BlockDev.get_available_plugin_names())
with fake_path(all_but="swaplabel"):
# no swaplabel available, the swap plugin should fail to load
with self.assertRaises(GLib.GError):
BlockDev.reinit(self.requested_plugins, True, None)
self.assertNotIn("swap", BlockDev.get_available_plugin_names())
# load the plugins back
self.assertTrue(BlockDev.reinit(self.requested_plugins, True, None))
self.assertIn("swap", BlockDev.get_available_plugin_names())
def test_check_no_mkswap_runtime(self):
"""Verify that runtime checking mkswap tool availability works as expected"""
# unload all plugins first
self.assertTrue(BlockDev.reinit([], True, None))
# make sure the initial checks during plugin loading are skipped
BlockDev.switch_init_checks(False)
self.addCleanup(BlockDev.switch_init_checks, True)
with fake_path(all_but="mkswap"):
# no mkswap available, but checks disabled, the swap plugin should load just fine
self.assertTrue(BlockDev.reinit(self.requested_plugins, True, None))
self.assertIn("swap", BlockDev.get_available_plugin_names())
with self.assertRaisesRegexp(GLib.GError, "The 'mkswap' utility is not available"):
# the device shouldn't matter, the function should return an
# error before any other checks or actions
BlockDev.swap_mkswap("/dev/device", "LABEL", None)
class SwapTechAvailable(SwapTest):
def setUp(self):
# set everything back and reinit just to be sure
self.addCleanup(BlockDev.switch_init_checks, True)
self.addCleanup(BlockDev.reinit, self.requested_plugins, True, None)
def test_check_tech_available(self):
"""Verify that runtime checking mkswap and swaplabel tools availability
works as expected
"""
with fake_path(all_but="mkswap"):
BlockDev.switch_init_checks(False)
BlockDev.reinit(self.requested_plugins, True, None)
with self.assertRaises(GLib.GError):
# we have swaplabel but not mkswap, so this should fail
BlockDev.swap_is_tech_avail(BlockDev.SwapTech.SWAP_TECH_SWAP,
BlockDev.SwapTechMode.CREATE | BlockDev.SwapTechMode.SET_LABEL)
with self.assertRaises(GLib.GError):
# we have swaplabel but not mkswap, so this should fail
BlockDev.swap_is_tech_avail(BlockDev.SwapTech.SWAP_TECH_SWAP,
BlockDev.SwapTechMode.CREATE)
# only label checked -- should pass
succ = BlockDev.swap_is_tech_avail(BlockDev.SwapTech.SWAP_TECH_SWAP,
BlockDev.SwapTechMode.SET_LABEL)
self.assertTrue(succ)
with fake_path(all_but="swaplabel"):
BlockDev.switch_init_checks(False)
BlockDev.reinit(self.requested_plugins, True, None)
with self.assertRaises(GLib.GError):
# we have mkswap but not swaplabel, so this should fail
BlockDev.swap_is_tech_avail(BlockDev.SwapTech.SWAP_TECH_SWAP,
BlockDev.SwapTechMode.CREATE | BlockDev.SwapTechMode.SET_LABEL)
with self.assertRaises(GLib.GError):
# we have mkswap but not swaplabel, so this should fail
BlockDev.swap_is_tech_avail(BlockDev.SwapTech.SWAP_TECH_SWAP,
BlockDev.SwapTechMode.SET_LABEL)
# only label checked -- should pass
succ = BlockDev.swap_is_tech_avail(BlockDev.SwapTech.SWAP_TECH_SWAP,
BlockDev.SwapTechMode.CREATE)
self.assertTrue(succ)
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