def test_from_device_number(self, a_context, device_datum):
mode = os.stat(device_datum.device_node).st_mode
typ = 'block' if stat.S_ISBLK(mode) else 'char'
device = Devices.from_device_number(
a_context, typ, device_datum.device_number)
assert device.device_number == device_datum.device_number
# make sure, we are really referring to the same device
assert device.device_path == device_datum.device_path
def test_from_device_number(self, a_context, device_datum):
mode = os.stat(device_datum.device_node).st_mode
typ = 'block' if stat.S_ISBLK(mode) else 'char'
device = Devices.from_device_number(
a_context, typ, device_datum.device_number)
assert device.device_number == device_datum.device_number
# make sure, we are really referring to the same device
assert device.device_path == device_datum.device_path
def test_from_device_number(self, a_context, a_device):
"""
Verify that from_device_number() yields the correct device.
"""
mode = os.stat(a_device.device_node).st_mode
typ = 'block' if stat.S_ISBLK(mode) else 'char'
device = \
Devices.from_device_number(a_context, typ, a_device.device_number)
assert a_device == device
def test_from_device_number_wrong_type(self, a_context, device_datum):
mode = os.stat(device_datum.device_node).st_mode
# deliberately use the wrong type here to cause either failure
# or at least device mismatch
typ = 'char' if stat.S_ISBLK(mode) else 'block'
try:
# this either fails, in which case the caught exception is
# raised, or succeeds, but returns a wrong device
# (device numbers are not unique across device types)
device = Devices.from_device_number(a_context, typ,
device_datum.device_number)
# if it succeeds, the resulting device must not match the
# one, we are actually looking for!
assert device.device_path != device_datum.device_path
except DeviceNotFoundByNumberError as error:
# check the correctness of the exception attributes
assert error.device_type == typ
assert error.device_number == device_datum.device_number
def test_from_device_number_wrong_type(
self,
a_context,
device_datum
):
mode = os.stat(device_datum.device_node).st_mode
# deliberately use the wrong type here to cause either failure
# or at least device mismatch
typ = 'char' if stat.S_ISBLK(mode) else 'block'
try:
# this either fails, in which case the caught exception is
# raised, or succeeds, but returns a wrong device
# (device numbers are not unique across device types)
device = Devices.from_device_number(
a_context, typ, device_datum.device_number)
# if it succeeds, the resulting device must not match the
# one, we are actually looking for!
assert device.device_path != device_datum.device_path
except DeviceNotFoundByNumberError as error:
# check the correctness of the exception attributes
assert error.device_type == typ
assert error.device_number == device_datum.device_number
def test_from_device_number_wrong_type(self, a_context, a_device):
"""
Verify appropriate behavior on real device number but swapped
subsystems.
"""
mode = os.stat(a_device.device_node).st_mode
# deliberately use the wrong type here to cause either failure
# or at least device mismatch
typ = "char" if stat.S_ISBLK(mode) else "block"
try:
# this either fails, in which case the caught exception is
# raised, or succeeds, but returns a wrong device
# (device numbers are not unique across device types)
device = Devices.from_device_number(a_context, typ,
a_device.device_number)
# if it succeeds, the resulting device must not match the
# one, we are actually looking for!
assert device != a_device
except DeviceNotFoundByNumberError as error:
# check the correctness of the exception attributes
assert error.device_type == typ
assert error.device_number == a_device.device_number
def test_from_device_number_invalid_type(self, a_context):
with pytest.raises(DeviceNotFoundByNumberError):
Devices.from_device_number(a_context, 'foobar', 100)
def test_from_device_number_invalid_type(self):
"""
Verify that a non-existant subsystem always results in an exception.
"""
with pytest.raises(DeviceNotFoundByNumberError):
Devices.from_device_number(_CONTEXT, 'foobar', 100)
def test_from_device_number_invalid_type(self, a_context):
with pytest.raises(DeviceNotFoundByNumberError):
Devices.from_device_number(a_context, 'foobar', 100)
