NFSTEST.TEST_UTIL(1) nfstest.test_util 1.0.2 NFSTEST.TEST_UTIL(1)
nfstest.test_util - Test utilities module
Provides a set of tools for testing either the NFS client or the NFS server, most of the
functionality is focused mainly on testing the client. These tools include the following:
- Process command line arguments
- Provide functionality for PASS/FAIL
- Provide test grouping functionality
- Provide multiple client support
- Logging mechanism
- Debug info control
- Mount/Unmount control
- Create files/directories
- Provide mechanism to start a packet trace
- Provide mechanism to simulate a network partition
- Support for pNFS testing
In order to use some of the functionality available, the user id in all the client hosts
must have access to run commands as root using the 'sudo' command without the need for a
password, this includes the host where the test is being executed. This is used to run
commands like 'mount' and 'umount'. Furthermore, the user id must be able to ssh to remote
hosts without the need for a password if test requires the use of multiple clients.
Network partition is simulated by the use of 'iptables', please be advised that after
every test run the iptables is flushed and reset so any rules previously setup will be
lost. Currently, there is no mechanism to restore the iptables rules to their original
TestUtil() -> New server object
x = TestUtil()
# Process command line options
# Start packet trace using tcpdump
# Mount volume
# Create file
# Unmount volume
# Stop packet trace
# Exit script
Methods defined here:
Gracefully stop the packet trace, cleanup files, unmount volume, and reset network.
Initialize object's private data.
usage: Usage string [default: '']
List of testnames [default: ] When this list is not empty, the --runtest
option is enabled and test scripts should use the run_tests() method to run
all the tests. Test script should have methods named as <testname>_test.
x = TestUtil(testnames=['basic', 'lock'])
# The following methods should exist:
abspath(self, filename, dir=None)
Return the absolute path for the given file name.
Clean up test environment.
Remove any files created: test files, trace files.
Close all files opened by open_files().
Display config message and terminate test with an exit value of 2.
create_dir(self, dir=None, mode=493)
Create a directory under the given directory with the given mode.
create_file(self, offset=0, size=None, dir=None, mode=None)
Create a file starting to write at given offset with total size of written data
given by the size option.
File offset where data will be written to [default: 0]
size: Total number of bytes to write [default: --filesize option]
dir: Create file under this directory
mode: File permissions [default: use default OS permissions]
Returns the file name created, the file name is also stored in the object attribute
filename -- attribute absfile is also available as the absolute path of the file
File created is removed at object destruction.
create_host(self, host, user='')
Create client host object and set defaults.
data_pattern(self, offset, size, pattern=None)
Return data pattern.
Starting offset of pattern
size: Size of data to return
Data pattern to return, default is of the form: hex_offset(0x%08X) abcde-
Delay I/O by value given or the value given in --iodelay option.
Terminate script with an exit value of 0 when all tests passed and a value of 1
when there is at least one test failure.
Return a unique directory name under the given directory.
Return a unique file name under the given directory.
Get unique name for this instance.
lock_files(self, lock_type=None, offset=0, length=0)
Lock all files opened by open_files().
open_files(self, mode, create=True)
Open files according to given mode, the file descriptors are saved internally to be
used with write_files(), read_files() and close_files(). The number of files to
open is controlled by the command line option '--nfiles'.
The mode could be either 'r' or 'w' for opening files for reading or writing
respectively. The open flags for mode 'r' is O_RDONLY while for mode 'w' is
O_WRONLY|O_CREAT|O_SYNC. The O_SYNC is used to avoid the client buffering the writ-
Read a block of data (size given by --rsize) from all files opened by open_files()
Run all test specified by the --runtest option.
List of testnames to run [default: all tests given by --testnames]
All other arguments given are passed to the test methods.
Process command line options.
Process all the options in the file given by '--file', then the ones in the command
line. This allows for command line options to over write options given in the file.
Format of options file:
# For options expecting a value
<option_name> = <value>
# For boolean (flag) options
Must use the long name of the option (--<option_name>) in the file.
Set up test environment.
Create nfiles number of files [default: --nfiles option]
Return the NFS string according to the given version and minorversion.
NFS version [default: --nfsversion option]
NFS minor version [default: --minorversion option]
test(self, expr, msg, subtest=None, failmsg=None, terminate=False)
Test expr and display message as PASS/FAIL, terminate execution if terminate option
expr: If expr is true, display as a PASS message, otherwise as a FAIL message
msg: Message to display
If given, append this string to the displayed message and mark this test as
a member of the sub-group given by msg
If given, append this string to the displayed message when expr is false
Terminate execution if true and expr is false [default: False]
If tverbose=normal or level 1:
Sub-group message is displayed as a PASS/FAIL message including
the number of tests that passed and failed within the sub-group If tver-
bose=verbose or level 2:
All tests messages are displayed
Display heading message and start a test group.
If tverbose=group or level 0:
Group message is displayed as a PASS/FAIL message including the
number of tests that passed and failed within this test group. If tver-
bose=normal|verbose or level 1|2:
Group message is displayed as a heading messages for the tests
belonging to this test group.
Display info message.
Return the number of instances the testid has occurred.
Display warning message.
Write a block of data (size given by --wsize) to all files opened by open_files()
Static methods defined here:
get_list(value, hash, type=<type 'str'>)
Return a list of elements from the comma separated string. Validate and translate
these elements using the input dictionary 'hash' where every element in the string
is the key of 'hash' and its value is appended to the returned list.
str_list(value, type=<type 'str'>)
Return a list of <type> elements from the comma separated string.
baseobj(1), nfstest.host(1), nfstest.nfs_util(1)
No known bugs.
Jorge Mora (firstname.lastname@example.org)
NFStest 1.0.2 10 April 2013 NFSTEST.TEST_UTIL(1)