# List of patterns, relative to source directory, that match files and
# directories to ignore when looking for source files.
-exclude_patterns = ['_build', 'building-libyang.rst']
+exclude_patterns = ['_build', 'building-libyang.rst', 'topotests-snippets.rst']
# The reST default role (used for this markup: `text`) to use for all
# documents.
packaging
process-architecture
library
+ testing
bgpd
ospf
zebra
doc/developer/ospf-api.rst \
doc/developer/ospf-sr.rst \
doc/developer/ospf.rst \
+ doc/developer/testing.rst \
+ doc/developer/topotests-snippets.rst \
+ doc/developer/topotests.rst \
doc/developer/workflow.rst \
doc/developer/zebra.rst \
# end
--- /dev/null
+.. _testing:
+
+*******
+Testing
+*******
+
+.. toctree::
+ :maxdepth: 2
+
+ topotests
--- /dev/null
+.. _topotests-snippets:
+
+Snippets
+--------
+
+This document will describe common snippets of code that are frequently needed
+to perform some test checks.
+
+Checking for router / test failures
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The following check uses the topogen API to check for software failure (e.g.
+zebra died) and/or for errors manually set by ``Topogen.set_error()``.
+
+.. code:: py
+
+ # Get the topology reference
+ tgen = get_topogen()
+
+ # Check for errors in the topology
+ if tgen.routers_have_failure():
+ # Skip the test with the topology errors as reason
+ pytest.skip(tgen.errors)
+
+Checking FRR routers version
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+This code snippet is usually run after the topology setup to make sure all
+routers instantiated in the topology have the correct software version.
+
+.. code:: py
+
+ # Get the topology reference
+ tgen = get_topogen()
+
+ # Get the router list
+ router_list = tgen.routers()
+
+ # Run the check for all routers
+ for router in router_list.values():
+ if router.has_version('<', '3'):
+ # Set topology error, so the next tests are skipped
+ tgen.set_error('unsupported version')
+
+A sample of this snippet in a test can be found `here
+<ldp-vpls-topo1/test_ldp_vpls_topo1.py>`__.
+
+Interacting with equipment
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+You might want to interact with the topology equipments during the tests and
+there are different ways to do so.
+
+Notes:
+
+1. When using the Topogen API, all the equipments code derive from ``Topogear``
+ (`lib/topogen.py <lib/topogen.py>`__). If you feel brave you can look by
+ yourself how the abstractions that will be mentioned here works.
+
+2. When not using the ``Topogen`` API there is only one way to interact with
+ the equipments, which is by calling the ``mininet`` API functions directly
+ to spawn commands.
+
+Interacting with the Linux sandbox
+""""""""""""""""""""""""""""""""""
+
+Without ``Topogen``:
+
+.. code:: py
+
+ global net
+ output = net['r1'].cmd('echo "foobar"')
+ print 'output is: {}'.format(output)
+
+With ``Topogen``:
+
+.. code:: py
+
+ tgen = get_topogen()
+ output = tgen.gears['r1'].run('echo "foobar"')
+ print 'output is: {}'.format(output)
+
+Interacting with VTYSH
+""""""""""""""""""""""
+
+Without ``Topogen``:
+
+.. code:: py
+
+ global net
+ output = net['r1'].cmd('vtysh "show ip route" 2>/dev/null')
+ print 'output is: {}'.format(output)
+
+With ``Topogen``:
+
+.. code:: py
+
+ tgen = get_topogen()
+ output = tgen.gears['r1'].vtysh_cmd("show ip route")
+ print 'output is: {}'.format(output)
+
+``Topogen`` also supports sending multiple lines of command:
+
+.. code:: py
+
+ tgen = get_topogen()
+ output = tgen.gears['r1'].vtysh_cmd("""
+ configure terminal
+ router bgp 10
+ bgp router-id 10.0.255.1
+ neighbor 1.2.3.4 remote-as 10
+ !
+ router bgp 11
+ bgp router-id 10.0.255.2
+ !
+ """)
+ print 'output is: {}'.format(output)
+
+You might also want to run multiple commands and get only the commands that
+failed:
+
+.. code:: py
+
+ tgen = get_topogen()
+ output = tgen.gears['r1'].vtysh_multicmd("""
+ configure terminal
+ router bgp 10
+ bgp router-id 10.0.255.1
+ neighbor 1.2.3.4 remote-as 10
+ !
+ router bgp 11
+ bgp router-id 10.0.255.2
+ !
+ """, pretty_output=false)
+ print 'output is: {}'.format(output)
+
+Translating vtysh JSON output into Python structures:
+
+.. code:: py
+
+ tgen = get_topogen()
+ json_output = tgen.gears['r1'].vtysh_cmd("show ip route json", isjson=True)
+ output = json.dumps(json_output, indent=4)
+ print 'output is: {}'.format(output)
+
+ # You can also access the data structure as normal. For example:
+ # protocol = json_output['1.1.1.1/32']['protocol']
+ # assert protocol == "ospf", "wrong protocol"
+
+.. note::
+
+ ``vtysh_(multi)cmd`` is only available for router type of equipments.
+
+Invoking mininet CLI
+^^^^^^^^^^^^^^^^^^^^
+
+Without ``Topogen``:
+
+.. code:: py
+
+ CLI(net)
+
+With ``Topogen``:
+
+.. code:: py
+
+ tgen = get_topogen()
+ tgen.mininet_cli()
+
+Reading files
+^^^^^^^^^^^^^
+
+Loading a normal text file content in the current directory:
+
+.. code:: py
+
+ # If you are using Topogen
+ # CURDIR = CWD
+ #
+ # Otherwise find the directory manually:
+ CURDIR = os.path.dirname(os.path.realpath(__file__))
+
+ file_name = '{}/r1/show_ip_route.txt'.format(CURDIR)
+ file_content = open(file_name).read()
+
+Loading JSON from a file:
+
+.. code:: py
+
+ import json
+
+ file_name = '{}/r1/show_ip_route.json'.format(CURDIR)
+ file_content = json.loads(open(file_name).read())
+
+Comparing JSON output
+^^^^^^^^^^^^^^^^^^^^^
+
+After obtaining JSON output formated with Python data structures, you may use
+it to assert a minimalist schema:
+
+.. code:: py
+
+ tgen = get_topogen()
+ json_output = tgen.gears['r1'].vtysh_cmd("show ip route json", isjson=True)
+
+ expect = {
+ '1.1.1.1/32': {
+ 'protocol': 'ospf'
+ }
+ }
+
+ assertmsg = "route 1.1.1.1/32 was not learned through OSPF"
+ assert json_cmp(json_output, expect) is None, assertmsg
+
+``json_cmp`` function description (it might be outdated, you can find the
+latest description in the source code at
+:file:`tests/topotests/lib/topotest.py`
+
+.. code:: text
+
+ JSON compare function. Receives two parameters:
+ * `d1`: json value
+ * `d2`: json subset which we expect
+
+ Returns `None` when all keys that `d1` has matches `d2`,
+ otherwise a string containing what failed.
+
+ Note: key absence can be tested by adding a key with value `None`.
+
+Pausing execution
+^^^^^^^^^^^^^^^^^
+
+Preferably, choose the ``sleep`` function that ``topotest`` provides, as it
+prints a notice during the test execution to help debug topology test execution
+time.
+
+.. code:: py
+
+ # Using the topotest sleep
+ from lib import topotest
+
+ topotest.sleep(10, 'waiting 10 seconds for bla')
+ # or just tell it the time:
+ # topotest.sleep(10)
+ # It will print 'Sleeping for 10 seconds'.
+
+ # Or you can also use the Python sleep, but it won't show anything
+ from time import sleep
+ sleep(5)
+
+iproute2 Linux commands as JSON
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+``topotest`` has two helpers implemented that parses the output of ``ip route``
+commands to JSON. It might simplify your comparison needs by only needing to
+provide a Python dictionary.
+
+.. code:: py
+
+ from lib import topotest
+
+ tgen = get_topogen()
+ routes = topotest.ip4_route(tgen.gears['r1'])
+ expected = {
+ '10.0.1.0/24': {},
+ '10.0.2.0/24': {
+ 'dev': 'r1-eth0'
+ }
+ }
+
+ assertmsg = "failed to find 10.0.1.0/24 and/or 10.0.2.0/24"
+ assert json_cmp(routes, expected) is None, assertmsg
--- /dev/null
+.. _topotests:
+
+Topotests
+=========
+
+Topotests is a suite of topology tests for FRR built on top of Mininet.
+
+Installation and Setup
+----------------------
+
+Only tested with Ubuntu 16.04 and Ubuntu 18.04 (which uses Mininet 2.2.x).
+
+Instructions are the same for all setups (i.e. ExaBGP is only used for BGP
+tests).
+
+Installing Mininet Infrastructure
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. code:: shell
+
+ apt-get install mininet
+ apt-get install python-pip
+ apt-get install iproute
+ pip install ipaddr
+ pip install pytest
+ pip install exabgp==3.4.17 (Newer 4.0 version of exabgp is not yet
+ supported)
+ useradd -d /var/run/exabgp/ -s /bin/false exabgp
+
+Enable Coredumps
+""""""""""""""""
+
+Optional, will give better output.
+
+.. code:: shell
+
+ apt-get install gdb
+ disable apport (which move core files)
+
+Set ``enabled=0`` in ``/etc/default/apport``.
+
+Next, update security limits by changing :file:`/etc/security/limits.conf` to::
+
+ #<domain> <type> <item> <value>
+ * soft core unlimited
+ root soft core unlimited
+ * hard core unlimited
+ root hard core unlimited
+
+Reboot for options to take effect.
+
+FRR Installation
+^^^^^^^^^^^^^^^^
+
+FRR needs to be installed separately. It is assume to be configured like the
+standard Ubuntu Packages:
+
+- Binaries in :file:`/usr/lib/frr`
+- State Directory :file:`/var/run/frr`
+- Running under user ``frr``, group ``frr``
+- vtygroup: ``frrvty``
+- config directory: :file:`/etc/frr`
+- For FRR Packages, install the dbg package as well for coredump decoding
+
+No FRR config needs to be done and no FRR daemons should be run ahead of the
+test. They are all started as part of the test.
+
+Manual FRR build
+""""""""""""""""
+
+If you prefer to manually build FRR, then use the following suggested config:
+
+.. code:: shell
+
+ ./configure \
+ --prefix=/usr \
+ --localstatedir=/var/run/frr \
+ --sbindir=/usr/lib/frr \
+ --sysconfdir=/etc/frr \
+ --enable-vtysh \
+ --enable-pimd \
+ --enable-multipath=64 \
+ --enable-user=frr \
+ --enable-group=frr \
+ --enable-vty-group=frrvty \
+ --with-pkg-extra-version=-my-manual-build
+
+And create ``frr`` user and ``frrvty`` group as follows:
+
+.. code:: shell
+
+ addgroup --system --gid 92 frr
+ addgroup --system --gid 85 frrvty
+ adduser --system --ingroup frr --home /var/run/frr/ \
+ --gecos "FRRouting suite" --shell /bin/false frr
+ usermod -G frrvty frr
+
+Executing Tests
+---------------
+
+Execute all tests with output to console
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. code:: shell
+
+ py.test -s -v --tb=no
+
+All test\_\* scripts in subdirectories are detected and executed (unless
+disabled in ``pytest.ini`` file).
+
+``--tb=no`` disables the python traceback which might be irrelevant unless the
+test script itself is debugged.
+
+Execute single test
+^^^^^^^^^^^^^^^^^^^
+
+.. code:: shell
+
+ cd test_to_be_run
+ ./test_to_be_run.py
+
+For further options, refer to pytest documentation.
+
+Test will set exit code which can be used with ``git bisect``.
+
+For the simulated topology, see the description in the python file.
+
+If you need to clear the mininet setup between tests (if it isn't cleanly
+shutdown), then use the ``mn -c`` command to clean up the environment.
+
+StdErr log from daemos after exit
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+To enable the reporting of any messages seen on StdErr after the daemons exit,
+the following env variable can be set::
+
+ export TOPOTESTS_CHECK_STDERR=Yes
+
+(The value doesn't matter at this time. The check is if the env variable exists
+or not) There is no pass/fail on this reporting. The Output will be reported to
+the console::
+
+ export TOPOTESTS_CHECK_MEMLEAK="/home/mydir/memleak_"
+
+This will enable the check and output to console and the writing of the
+information to files with the given prefix (followed by testname), ie
+:file:`/home/mydir/memcheck_test_bgp_multiview_topo1.txt` in case of a memory
+leak.
+
+Collect Memory Leak Information
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+FRR processes have the capabilities to report remaining memory allocations upon
+exit. To enable the reporting of the memory, define an enviroment variable
+``TOPOTESTS_CHECK_MEMLEAK`` with the file prefix, i.e.::
+
+ export TOPOTESTS_CHECK_MEMLEAK="/home/mydir/memleak_"
+
+This will enable the check and output to console and the writing of the
+information to files with the given prefix (followed by testname), ie
+:file:`/home/mydir/memcheck_test_bgp_multiview_topo1.txt` in case of a memory
+leak.
+
+Running Topotests with AddressSanitizer
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Topotests can be run with AddressSanitizer. It requires GCC 4.8 or newer.
+(Ubuntu 16.04 as suggested here is fine with GCC 5 as default). For more
+information on AddressSanitizer, see
+https://github.com/google/sanitizers/wiki/AddressSanitizer.
+
+The checks are done automatically in the library call of ``checkRouterRunning``
+(ie at beginning of tests when there is a check for all daemons running). No
+changes or extra configuration for topotests is required beside compiling the
+suite with AddressSanitizer enabled.
+
+If a daemon crashed, then the errorlog is checked for AddressSanitizer output.
+If found, then this is added with context (calling test) to
+:file:`/tmp/AddressSanitizer.txt` in Markdown compatible format.
+
+Compiling for GCC AddressSanitizer requires to use ``gcc`` as a linker as well
+(instead of ``ld``). Here is a suggest way to compile frr with AddressSanitizer
+for ``stable/3.0`` branch:
+
+.. code:: shell
+
+ git clone https://github.com/FRRouting/frr.git
+ cd frr
+ git checkout stable/3.0
+ ./bootstrap.sh
+ export CC=gcc
+ export CFLAGS="-O1 -g -fsanitize=address -fno-omit-frame-pointer"
+ export LD=gcc
+ export LDFLAGS="-g -fsanitize=address -ldl"
+ ./configure --enable-shared=no \
+ --prefix=/usr/lib/frr --sysconfdir=/etc/frr \
+ --localstatedir=/var/run/frr \
+ --sbindir=/usr/lib/frr --bindir=/usr/lib/frr \
+ --enable-exampledir=/usr/lib/frr/examples \
+ --with-moduledir=/usr/lib/frr/modules \
+ --enable-multipath=0 --enable-rtadv \
+ --enable-tcp-zebra --enable-fpm --enable-pimd
+ make
+ sudo make install
+ # Create symlink for vtysh, so topotest finds it in /usr/lib/frr
+ sudo ln -s /usr/lib/frr/vtysh /usr/bin/
+
+and create ``frr`` user and ``frrvty`` group as shown above.
+
+.. _topotests_docker:
+
+Running Tests with Docker
+-------------------------
+
+There is a Docker image which allows to run topotests.
+
+Quickstart
+^^^^^^^^^^
+
+If you have Docker installed, you can run the topotests in Docker. The easiest
+way to do this, is to use the make targets from this repository.
+
+Your current user needs to have access to the Docker daemon. Alternatively you
+can run these commands as root.
+
+.. code:: console
+
+ make topotests
+
+This command will pull the most recent topotests image from Dockerhub, compile
+FRR inside of it, and run the topotests.
+
+Advanced Usage
+^^^^^^^^^^^^^^
+
+Internally, the topotests make target uses a shell script to pull the image and
+spawn the Docker container.
+
+There are several environment variables which can be used to modify the
+behavior of the script, these can be listed by calling it with ``-h``:
+
+.. code:: console
+
+ ./tests/topotests/docker/frr-topotests.sh -h
+
+For example, a volume is used to cache build artifacts between multiple runs of
+the image. If you need to force a complete recompile, you can set
+``TOPOTEST_CLEAN``:
+
+.. code:: console
+
+ TOPOTEST_CLEAN=1 ./tests/topotests/docker/frr-topotests.sh
+
+By default, ``frr-topotests.sh`` will build frr and run pytest. If you append
+arguments and the first one starts with ``/`` or ``./``, they will replace the
+call to pytest. If the appended arguments do not match this patttern, they will
+be provided to pytest as arguments. So, to run a specific test with more
+verbose logging:
+
+.. code:: console
+
+ ./tests/topotests/docker/frr-topotests.sh -vv -s all-protocol-startup/test_all_protocol_startup.py
+
+And to compile FRR but drop into a shell instead of running pytest:
+
+.. code:: console
+
+ ./tests/topotests/docker/frr-topotests.sh /bin/bash
+
+Development
+^^^^^^^^^^^
+
+The Docker image just includes all the components to run the topotests, but not
+the topotests themselves. So if you just want to write tests and don't want to
+make changes to the environment provided by the Docker image. You don't need to
+build your own Docker image if you do not want to.
+
+When developing new tests, there is one caveat though: The startup script of
+the container will run a ``git-clean`` on its copy of the FRR tree to avoid any
+pollution of the container with build artefacts from the host. This will also
+result in your newly written tests being unavailable in the container unless at
+least added to the index with ``git-add``.
+
+If you do want to test changes to the Docker image, you can locally build the
+image and run the tests without pulling from the registry using the following
+commands:
+
+.. code:: console
+
+ make topotests-build
+ TOPOTEST_PULL=0 make topotests
+
+
+.. _topotests-guidelines:
+
+Guidelines
+----------
+
+Executing Tests
+^^^^^^^^^^^^^^^
+
+To run the whole suite of tests the following commands must be executed at the
+top level directory of topotest:
+
+.. code:: shell
+
+ $ # Change to the top level directory of topotests.
+ $ cd path/to/topotests
+ $ # Tests must be run as root, since Mininet requires it.
+ $ sudo pytest
+
+In order to run a specific test, you can use the following command:
+
+.. code:: shell
+
+ $ # running a specific topology
+ $ sudo pytest ospf-topo1/
+ $ # or inside the test folder
+ $ cd ospf-topo1
+ $ sudo pytest # to run all tests inside the directory
+ $ sudo pytest test_ospf_topo1.py # to run a specific test
+ $ # or outside the test folder
+ $ cd ..
+ $ sudo pytest ospf-topo1/test_ospf_topo1.py # to run a specific one
+
+The output of the tested daemons will be available at the temporary folder of
+your machine:
+
+.. code:: shell
+
+ $ ls /tmp/topotest/ospf-topo1.test_ospf-topo1/r1
+ ...
+ zebra.err # zebra stderr output
+ zebra.log # zebra log file
+ zebra.out # zebra stdout output
+ ...
+
+You can also run memory leak tests to get reports:
+
+.. code:: shell
+
+ $ # Set the environment variable to apply to a specific test...
+ $ sudo env TOPOTESTS_CHECK_MEMLEAK="/tmp/memleak_report_" pytest ospf-topo1/test_ospf_topo1.py
+ $ # ...or apply to all tests adding this line to the configuration file
+ $ echo 'memleak_path = /tmp/memleak_report_' >> pytest.ini
+ $ # You can also use your editor
+ $ $EDITOR pytest.ini
+ $ # After running tests you should see your files:
+ $ ls /tmp/memleak_report_*
+ memleak_report_test_ospf_topo1.txt
+
+Writing a New Test
+^^^^^^^^^^^^^^^^^^
+
+This section will guide you in all recommended steps to produce a standard
+topology test.
+
+This is the recommended test writing routine:
+
+- Write a topology (Graphviz recommended)
+- Obtain configuration files
+- Write the test itself
+- Create a Pull Request
+
+Topotest File Hierarchy
+"""""""""""""""""""""""
+
+Before starting to write any tests one must know the file hierarchy. The
+repository hierarchy looks like this:
+
+.. code:: shell
+
+ $ cd path/to/topotest
+ $ find ./*
+ ...
+ ./README.md # repository read me
+ ./GUIDELINES.md # this file
+ ./conftest.py # test hooks - pytest related functions
+ ./example-test # example test folder
+ ./example-test/__init__.py # python package marker - must always exist.
+ ./example-test/test_template.jpg # generated topology picture - see next section
+ ./example-test/test_template.dot # Graphviz dot file
+ ./example-test/test_template.py # the topology plus the test
+ ...
+ ./ospf-topo1 # the ospf topology test
+ ./ospf-topo1/r1 # router 1 configuration files
+ ./ospf-topo1/r1/zebra.conf # zebra configuration file
+ ./ospf-topo1/r1/ospfd.conf # ospf configuration file
+ ./ospf-topo1/r1/ospfroute.txt # 'show ip ospf' output reference file
+ # removed other for shortness sake
+ ...
+ ./lib # shared test/topology functions
+ ./lib/topogen.py # topogen implementation
+ ./lib/topotest.py # topotest implementation
+
+Guidelines for creating/editing topotest:
+
+- New topologies that don't fit the existing directories should create its own
+- Always remember to add the ``__init__.py`` to new folders, this makes auto
+ complete engines and pylint happy
+- Router (Quagga/FRR) specific code should go on topotest.py
+- Generic/repeated router actions should have an abstraction in
+ topogen.TopoRouter.
+- Generic/repeated non-router code should go to topotest.py
+- pytest related code should go to conftest.py (e.g. specialized asserts)
+
+Defining the Topology
+"""""""""""""""""""""
+
+The first step to write a new test is to define the topology. This step can be
+done in many ways, but the recommended is to use Graphviz to generate a drawing
+of the topology. It allows us to see the topology graphically and to see the
+names of equipments, links and addresses.
+
+Here is an example of Graphviz dot file that generates the template topology
+:file:`tests/topotests/example-test/test_template.dot` (the inlined code might
+get outdated, please see the linked file)::
+
+ graph template {
+ label="template";
+
+ # Routers
+ r1 [
+ shape=doubleoctagon,
+ label="r1",
+ fillcolor="#f08080",
+ style=filled,
+ ];
+ r2 [
+ shape=doubleoctagon,
+ label="r2",
+ fillcolor="#f08080",
+ style=filled,
+ ];
+
+ # Switches
+ s1 [
+ shape=oval,
+ label="s1\n192.168.0.0/24",
+ fillcolor="#d0e0d0",
+ style=filled,
+ ];
+ s2 [
+ shape=oval,
+ label="s2\n192.168.1.0/24",
+ fillcolor="#d0e0d0",
+ style=filled,
+ ];
+
+ # Connections
+ r1 -- s1 [label="eth0\n.1"];
+
+ r1 -- s2 [label="eth1\n.100"];
+ r2 -- s2 [label="eth0\n.1"];
+ }
+
+Here is the produced graph:
+
+.. graphviz::
+
+ graph template {
+ label="template";
+
+ # Routers
+ r1 [
+ shape=doubleoctagon,
+ label="r1",
+ fillcolor="#f08080",
+ style=filled,
+ ];
+ r2 [
+ shape=doubleoctagon,
+ label="r2",
+ fillcolor="#f08080",
+ style=filled,
+ ];
+
+ # Switches
+ s1 [
+ shape=oval,
+ label="s1\n192.168.0.0/24",
+ fillcolor="#d0e0d0",
+ style=filled,
+ ];
+ s2 [
+ shape=oval,
+ label="s2\n192.168.1.0/24",
+ fillcolor="#d0e0d0",
+ style=filled,
+ ];
+
+ # Connections
+ r1 -- s1 [label="eth0\n.1"];
+
+ r1 -- s2 [label="eth1\n.100"];
+ r2 -- s2 [label="eth0\n.1"];
+ }
+
+Generating / Obtaining Configuration Files
+""""""""""""""""""""""""""""""""""""""""""
+
+In order to get the configuration files or command output for each router, we
+need to run the topology and execute commands in ``vtysh``. The quickest way to
+achieve that is writing the topology building code and running the topology.
+
+To bootstrap your test topology, do the following steps:
+
+- Copy the template test
+
+.. code:: shell
+
+ $ mkdir new-topo/
+ $ touch new-topo/__init__.py
+ $ cp example-test/test_template.py new-topo/test_new_topo.py
+
+- Modify the template according to your dot file
+
+Here is the template topology described in the previous section in python code:
+
+.. code:: py
+
+ class TemplateTopo(Topo):
+ "Test topology builder"
+ def build(self, *_args, **_opts):
+ "Build function"
+ tgen = get_topogen(self)
+
+ # Create 2 routers
+ for routern in range(1, 3):
+ tgen.add_router('r{}'.format(routern))
+
+ # Create a switch with just one router connected to it to simulate a
+ # empty network.
+ switch = tgen.add_switch('s1')
+ switch.add_link(tgen.gears['r1'])
+
+ # Create a connection between r1 and r2
+ switch = tgen.add_switch('s2')
+ switch.add_link(tgen.gears['r1'])
+ switch.add_link(tgen.gears['r2'])
+
+- Run the topology
+
+Topogen allows us to run the topology without running any tests, you can do
+that using the following example commands:
+
+.. code:: shell
+
+ $ # Running your bootstraped topology
+ $ sudo pytest -s --topology-only new-topo/test_new_topo.py
+ $ # Running the test_template.py topology
+ $ sudo pytest -s --topology-only example-test/test_template.py
+ $ # Running the ospf_topo1.py topology
+ $ sudo pytest -s --topology-only ospf-topo1/test_ospf_topo1.py
+
+Parameters explanation:
+
+.. program:: pytest
+
+.. option:: -s
+
+ Actives input/output capture. This is required by mininet in order to show
+ the interactive shell.
+
+.. option:: --topology-only
+
+ Don't run any tests, just build the topology.
+
+After executing the commands above, you should get the following terminal
+output:
+
+.. code:: shell
+
+ === test session starts ===
+ platform linux2 -- Python 2.7.12, pytest-3.1.2, py-1.4.34, pluggy-0.4.0
+ rootdir: /media/sf_src/topotests, inifile: pytest.ini
+ collected 3 items
+
+ ospf-topo1/test_ospf_topo1.py *** Starting controller
+
+ *** Starting 6 switches
+ switch1 switch2 switch3 switch4 switch5 switch6 ...
+ r2: frr zebra started
+ r2: frr ospfd started
+ r3: frr zebra started
+ r3: frr ospfd started
+ r1: frr zebra started
+ r1: frr ospfd started
+ r4: frr zebra started
+ r4: frr ospfd started
+ *** Starting CLI:
+ mininet>
+
+The last line shows us that we are now using the Mininet CLI (Command Line
+Interface), from here you can call your router ``vtysh`` or even bash.
+
+Here are some commands example:
+
+.. code:: shell
+
+ mininet> r1 ping 10.0.3.1
+ PING 10.0.3.1 (10.0.3.1) 56(84) bytes of data.
+ 64 bytes from 10.0.3.1: icmp_seq=1 ttl=64 time=0.576 ms
+ 64 bytes from 10.0.3.1: icmp_seq=2 ttl=64 time=0.083 ms
+ 64 bytes from 10.0.3.1: icmp_seq=3 ttl=64 time=0.088 ms
+ ^C
+ --- 10.0.3.1 ping statistics ---
+ 3 packets transmitted, 3 received, 0% packet loss, time 1998ms
+ rtt min/avg/max/mdev = 0.083/0.249/0.576/0.231 ms
+
+
+
+ mininet> r1 ping 10.0.3.3
+ PING 10.0.3.3 (10.0.3.3) 56(84) bytes of data.
+ 64 bytes from 10.0.3.3: icmp_seq=1 ttl=64 time=2.87 ms
+ 64 bytes from 10.0.3.3: icmp_seq=2 ttl=64 time=0.080 ms
+ 64 bytes from 10.0.3.3: icmp_seq=3 ttl=64 time=0.091 ms
+ ^C
+ --- 10.0.3.3 ping statistics ---
+ 3 packets transmitted, 3 received, 0% packet loss, time 2003ms
+ rtt min/avg/max/mdev = 0.080/1.014/2.872/1.313 ms
+
+
+
+ mininet> r3 vtysh
+
+ Hello, this is FRRouting (version 3.1-devrzalamena-build).
+ Copyright 1996-2005 Kunihiro Ishiguro, et al.
+
+ frr-1# show running-config
+ Building configuration...
+
+ Current configuration:
+ !
+ frr version 3.1-devrzalamena-build
+ frr defaults traditional
+ hostname r3
+ no service integrated-vtysh-config
+ !
+ log file zebra.log
+ !
+ log file ospfd.log
+ !
+ interface r3-eth0
+ ip address 10.0.3.1/24
+ !
+ interface r3-eth1
+ ip address 10.0.10.1/24
+ !
+ interface r3-eth2
+ ip address 172.16.0.2/24
+ !
+ router ospf
+ ospf router-id 10.0.255.3
+ redistribute kernel
+ redistribute connected
+ redistribute static
+ network 10.0.3.0/24 area 0
+ network 10.0.10.0/24 area 0
+ network 172.16.0.0/24 area 1
+ !
+ line vty
+ !
+ end
+ frr-1#
+
+After you successfully configured your topology, you can obtain the
+configuration files (per-daemon) using the following commands:
+
+.. code:: shell
+
+ mininet> r3 vtysh -d ospfd
+
+ Hello, this is FRRouting (version 3.1-devrzalamena-build).
+ Copyright 1996-2005 Kunihiro Ishiguro, et al.
+
+ frr-1# show running-config
+ Building configuration...
+
+ Current configuration:
+ !
+ frr version 3.1-devrzalamena-build
+ frr defaults traditional
+ no service integrated-vtysh-config
+ !
+ log file ospfd.log
+ !
+ router ospf
+ ospf router-id 10.0.255.3
+ redistribute kernel
+ redistribute connected
+ redistribute static
+ network 10.0.3.0/24 area 0
+ network 10.0.10.0/24 area 0
+ network 172.16.0.0/24 area 1
+ !
+ line vty
+ !
+ end
+ frr-1#
+
+Writing Tests
+"""""""""""""
+
+Test topologies should always be bootstrapped from
+:file:`tests/topotests/example-test/test_template.py` because it contains
+important boilerplate code that can't be avoided, like:
+
+- imports: os, sys, pytest, topotest/topogen and mininet topology class
+- The global variable CWD (Current Working directory): which is most likely
+ going to be used to reference the routers configuration file location
+
+Example:
+
+.. code:: py
+
+ # For all registered routers, load the zebra configuration file
+ for rname, router in router_list.iteritems():
+ router.load_config(
+ TopoRouter.RD_ZEBRA,
+ os.path.join(CWD, '{}/zebra.conf'.format(rname))
+ )
+ # os.path.join() joins the CWD string with arguments adding the necessary
+ # slashes ('/'). Arguments must not begin with '/'.
+
+- The topology class that inherits from Mininet Topo class:
+
+.. code:: py
+
+ class TemplateTopo(Topo):
+ def build(self, *_args, **_opts):
+ tgen = get_topogen(self)
+ # topology build code
+
+- pytest ``setup_module()`` and ``teardown_module()`` to start the topology
+
+.. code:: py
+
+ def setup_module(_m):
+ tgen = Topogen(TemplateTopo)
+ tgen.start_topology('debug')
+
+ def teardown_module(_m):
+ tgen = get_topogen()
+ tgen.stop_topology()
+
+- ``__main__`` initialization code (to support running the script directly)
+
+.. code:: py
+
+ if __name__ == '__main__':
+ sys.exit(pytest.main(["-s"]))
+
+Requirements:
+
+- Test code should always be declared inside functions that begin with the
+ ``test_`` prefix. Functions beginning with different prefixes will not be run
+ by pytest.
+- Configuration files and long output commands should go into separated files
+ inside folders named after the equipment.
+- Tests must be able to run without any interaction. To make sure your test
+ conforms with this, run it without the :option:`-s` parameter.
+
+Tips:
+
+- Keep results in stack variables, so people inspecting code with ``pdb`` can
+ easily print their values.
+
+Don't do this:
+
+.. code:: py
+
+ assert foobar(router1, router2)
+
+Do this instead:
+
+.. code:: py
+
+ result = foobar(router1, router2)
+ assert result
+
+- Use ``assert`` messages to indicate where the test failed.
+
+Example:
+
+.. code:: py
+
+ for router in router_list:
+ # ...
+ assert condition, 'Router "{}" condition failed'.format(router.name)
+
+Debugging Execution
+^^^^^^^^^^^^^^^^^^^
+
+The most effective ways to inspect topology tests are:
+
+- Run pytest with ``--pdb`` option. This option will cause a pdb shell to
+ appear when an assertion fails
+
+Example: ``pytest -s --pdb ospf-topo1/test_ospf_topo1.py``
+
+- Set a breakpoint in the test code with ``pdb``
+
+Example:
+
+.. code:: py
+
+ # Add the pdb import at the beginning of the file
+ import pdb
+ # ...
+
+ # Add a breakpoint where you think the problem is
+ def test_bla():
+ # ...
+ pdb.set_trace()
+ # ...
+
+The `Python Debugger <https://docs.python.org/2.7/library/pdb.html>`__ (pdb)
+shell allows us to run many useful operations like:
+
+- Setting breaking point on file/function/conditions (e.g. ``break``,
+ ``condition``)
+- Inspecting variables (e.g. ``p`` (print), ``pp`` (pretty print))
+- Running python code
+
+.. tip::
+
+ The TopoGear (equipment abstraction class) implements the ``__str__`` method
+ that allows the user to inspect equipment information.
+
+Example of pdb usage:
+
+.. code:: shell
+
+ > /media/sf_src/topotests/ospf-topo1/test_ospf_topo1.py(121)test_ospf_convergence()
+ -> for rnum in range(1, 5):
+ (Pdb) help
+ Documented commands (type help <topic>):
+ ========================================
+ EOF bt cont enable jump pp run unt
+ a c continue exit l q s until
+ alias cl d h list quit step up
+ args clear debug help n r tbreak w
+ b commands disable ignore next restart u whatis
+ break condition down j p return unalias where
+
+ Miscellaneous help topics:
+ ==========================
+ exec pdb
+
+ Undocumented commands:
+ ======================
+ retval rv
+
+ (Pdb) list
+ 116 title2="Expected output")
+ 117
+ 118 def test_ospf_convergence():
+ 119 "Test OSPF daemon convergence"
+ 120 pdb.set_trace()
+ 121 -> for rnum in range(1, 5):
+ 122 router = 'r{}'.format(rnum)
+ 123
+ 124 # Load expected results from the command
+ 125 reffile = os.path.join(CWD, '{}/ospfroute.txt'.format(router))
+ 126 expected = open(reffile).read()
+ (Pdb) step
+ > /media/sf_src/topotests/ospf-topo1/test_ospf_topo1.py(122)test_ospf_convergence()
+ -> router = 'r{}'.format(rnum)
+ (Pdb) step
+ > /media/sf_src/topotests/ospf-topo1/test_ospf_topo1.py(125)test_ospf_convergence()
+ -> reffile = os.path.join(CWD, '{}/ospfroute.txt'.format(router))
+ (Pdb) print rnum
+ 1
+ (Pdb) print router
+ r1
+ (Pdb) tgen = get_topogen()
+ (Pdb) pp tgen.gears[router]
+ <lib.topogen.TopoRouter object at 0x7f74e06c9850>
+ (Pdb) pp str(tgen.gears[router])
+ 'TopoGear<name="r1",links=["r1-eth0"<->"s1-eth0","r1-eth1"<->"s3-eth0"]> TopoRouter<>'
+ (Pdb) l 125
+ 120 pdb.set_trace()
+ 121 for rnum in range(1, 5):
+ 122 router = 'r{}'.format(rnum)
+ 123
+ 124 # Load expected results from the command
+ 125 -> reffile = os.path.join(CWD, '{}/ospfroute.txt'.format(router))
+ 126 expected = open(reffile).read()
+ 127
+ 128 # Run test function until we get an result. Wait at most 60 seconds.
+ 129 test_func = partial(compare_show_ip_ospf, router, expected)
+ 130 result, diff = topotest.run_and_expect(test_func, '',
+ (Pdb) router1 = tgen.gears[router]
+ (Pdb) router1.vtysh_cmd('show ip ospf route')
+ '============ OSPF network routing table ============\r\nN 10.0.1.0/24 [10] area: 0.0.0.0\r\n directly attached to r1-eth0\r\nN 10.0.2.0/24 [20] area: 0.0.0.0\r\n via 10.0.3.3, r1-eth1\r\nN 10.0.3.0/24 [10] area: 0.0.0.0\r\n directly attached to r1-eth1\r\nN 10.0.10.0/24 [20] area: 0.0.0.0\r\n via 10.0.3.1, r1-eth1\r\nN IA 172.16.0.0/24 [20] area: 0.0.0.0\r\n via 10.0.3.1, r1-eth1\r\nN IA 172.16.1.0/24 [30] area: 0.0.0.0\r\n via 10.0.3.1, r1-eth1\r\n\r\n============ OSPF router routing table =============\r\nR 10.0.255.2 [10] area: 0.0.0.0, ASBR\r\n via 10.0.3.3, r1-eth1\r\nR 10.0.255.3 [10] area: 0.0.0.0, ABR, ASBR\r\n via 10.0.3.1, r1-eth1\r\nR 10.0.255.4 IA [20] area: 0.0.0.0, ASBR\r\n via 10.0.3.1, r1-eth1\r\n\r\n============ OSPF external routing table ===========\r\n\r\n\r\n'
+ (Pdb) tgen.mininet_cli()
+ *** Starting CLI:
+ mininet>
+
+To enable more debug messages in other Topogen subsystems (like Mininet), more
+logging messages can be displayed by modifying the test configuration file
+``pytest.ini``:
+
+.. code:: ini
+
+ [topogen]
+ # Change the default verbosity line from 'info'...
+ #verbosity = info
+ # ...to 'debug'
+ verbosity = debug
+
+Instructions for use, write or debug topologies can be found in :ref:`topotests-guidelines`.
+To learn/remember common code snippets see :ref:`topotests-snippets`.
+
+Before creating a new topology, make sure that there isn't one already that
+does what you need. If nothing is similar, then you may create a new topology,
+preferably, using the newest template
+(:file:`tests/topotests/example-test/test_template.py`).
+
+.. include:: topotests-snippets.rst
+
+License
+-------
+
+All the configs and scripts are licensed under a ISC-style license. See Python
+scripts for details.
--- /dev/null
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+
+lib_test_ttable_SOURCES = lib/test_ttable.c
+lib_test_zmq_SOURCES = lib/test_zmq.c
+lib_test_zmq_CFLAGS = $(AM_CFLAGS) $(ZEROMQ_CFLAGS)
+lib_cli_test_cli_SOURCES = lib/cli/test_cli.c lib/cli/common_cli.c
+lib_cli_test_commands_SOURCES = lib/cli/test_commands_defun.c \
+ lib/cli/test_commands.c \
+ helpers/c/prng.c
+
+bgpd_test_aspath_SOURCES = bgpd/test_aspath.c
+bgpd_test_capability_SOURCES = bgpd/test_capability.c
+bgpd_test_packet_SOURCES = bgpd/test_packet.c
+bgpd_test_ecommunity_SOURCES = bgpd/test_ecommunity.c
+bgpd_test_mp_attr_SOURCES = bgpd/test_mp_attr.c
+bgpd_test_mpath_SOURCES = bgpd/test_mpath.c
+isisd_test_fuzz_isis_tlv_SOURCES = isisd/test_fuzz_isis_tlv.c
+isisd_test_fuzz_isis_tlv_CPPFLAGS = $(AM_CPPFLAGS) -I$(top_builddir)/tests/isisd
+isisd_test_isis_vertex_queue_SOURCES = isisd/test_isis_vertex_queue.c
+ospf6d_test_lsdb_SOURCES = ospf6d/test_lsdb.c lib/cli/common_cli.c
+ALL_TESTS_LDADD = ../lib/libfrr.la @LIBCAP@
+BGP_TEST_LDADD = ../bgpd/libbgp.a $(BGP_VNC_RFP_LIB) $(ALL_TESTS_LDADD) -lm
+ISISD_TEST_LDADD = ../isisd/libisis.a $(ALL_TESTS_LDADD)
+OSPF6_TEST_LDADD = ../ospf6d/libospf6.a $(ALL_TESTS_LDADD)
+lib_test_buffer_LDADD = $(ALL_TESTS_LDADD)
+lib_test_checksum_LDADD = $(ALL_TESTS_LDADD)
+lib_test_heavy_thread_LDADD = $(ALL_TESTS_LDADD) -lm
+lib_test_heavy_wq_LDADD = $(ALL_TESTS_LDADD) -lm
+lib_test_heavy_LDADD = $(ALL_TESTS_LDADD) -lm
+lib_test_memory_LDADD = $(ALL_TESTS_LDADD)
+lib_test_nexthop_iter_LDADD = $(ALL_TESTS_LDADD)
+lib_test_privs_LDADD = $(ALL_TESTS_LDADD)
+lib_test_ringbuf_LDADD = $(ALL_TESTS_LDADD)
+lib_test_srcdest_table_LDADD = $(ALL_TESTS_LDADD)
+lib_test_segv_LDADD = $(ALL_TESTS_LDADD)
+lib_test_sig_LDADD = $(ALL_TESTS_LDADD)
+lib_test_stream_LDADD = $(ALL_TESTS_LDADD)
+lib_test_table_LDADD = $(ALL_TESTS_LDADD) -lm
+lib_test_timer_correctness_LDADD = $(ALL_TESTS_LDADD)
+lib_test_timer_performance_LDADD = $(ALL_TESTS_LDADD)
+lib_test_ttable_LDADD = $(ALL_TESTS_LDADD)
+lib_test_zmq_LDADD = ../lib/libfrrzmq.la $(ALL_TESTS_LDADD) $(ZEROMQ_LIBS)
+lib_cli_test_cli_LDADD = $(ALL_TESTS_LDADD)
+lib_cli_test_commands_LDADD = $(ALL_TESTS_LDADD)
+bgpd_test_aspath_LDADD = $(BGP_TEST_LDADD)
+bgpd_test_capability_LDADD = $(BGP_TEST_LDADD)
+bgpd_test_packet_LDADD = $(BGP_TEST_LDADD)
+bgpd_test_ecommunity_LDADD = $(BGP_TEST_LDADD)
+bgpd_test_mp_attr_LDADD = $(BGP_TEST_LDADD)
+bgpd_test_mpath_LDADD = $(BGP_TEST_LDADD)
+isisd_test_fuzz_isis_tlv_LDADD = $(ISISD_TEST_LDADD)
+isisd_test_isis_vertex_queue_LDADD = $(ISISD_TEST_LDADD)
+ospf6d_test_lsdb_LDADD = $(OSPF6_TEST_LDADD)
+EXTRA_DIST = \
+ runtests.py \
+ bgpd/test_aspath.py \
+ bgpd/test_capability.py \
+ bgpd/test_ecommunity.py \
+ bgpd/test_mp_attr.py \
+ bgpd/test_mpath.py \
+ helpers/python/frrsix.py \
+ helpers/python/frrtest.py \
+ isisd/test_fuzz_isis_tlv.py \
+ isisd/test_fuzz_isis_tlv_tests.h.gz \
+ isisd/test_isis_vertex_queue.py \
+ lib/cli/test_commands.in \
+ lib/cli/test_commands.py \
+ lib/cli/test_commands.refout \
+ lib/cli/test_cli.in \
+ lib/cli/test_cli.py \
+ lib/cli/test_cli.refout \
+ lib/test_nexthop_iter.py \
+ lib/test_ringbuf.py \
+ lib/test_srcdest_table.py \
+ lib/test_stream.py \
+ lib/test_stream.refout \
+ lib/test_table.py \
+ lib/test_timer_correctness.py \
+ lib/test_ttable.py \
+ lib/test_ttable.refout \
+ ospf6d/test_lsdb.py \
+ ospf6d/test_lsdb.in \
+ ospf6d/test_lsdb.refout \
+ # end
+
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: _clippy.c .proto .pb-c.c .pb-c.h .pb.h .c .l .lo .o .obj .y
+$(srcdir)/Makefile.in: $(srcdir)/Makefile.am $(srcdir)/../common.am $(am__configure_deps)
+ @for dep in $?; do \
+ case '$(am__configure_deps)' in \
+ *$$dep*) \
+ ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+ && { if test -f $@; then exit 0; else break; fi; }; \
+ exit 1;; \
+ esac; \
+ done; \
+ echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu tests/Makefile'; \
+ $(am__cd) $(top_srcdir) && \
+ $(AUTOMAKE) --gnu tests/Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+ @case '$?' in \
+ *config.status*) \
+ cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+ *) \
+ echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
+ cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
+ esac;
+$(srcdir)/../common.am $(am__empty):
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+ cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure: $(am__configure_deps)
+ cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4): $(am__aclocal_m4_deps)
+ cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+clean-checkPROGRAMS:
+ @list='$(check_PROGRAMS)'; test -n "$$list" || exit 0; \
+ echo " rm -f" $$list; \
+ rm -f $$list || exit $$?; \
+ test -n "$(EXEEXT)" || exit 0; \
+ list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+ echo " rm -f" $$list; \
+ rm -f $$list
+bgpd/$(am__dirstamp):
+ @$(MKDIR_P) bgpd
+ @: > bgpd/$(am__dirstamp)
+bgpd/$(DEPDIR)/$(am__dirstamp):
+ @$(MKDIR_P) bgpd/$(DEPDIR)
+ @: > bgpd/$(DEPDIR)/$(am__dirstamp)
+bgpd/test_aspath.$(OBJEXT): bgpd/$(am__dirstamp) \
+ bgpd/$(DEPDIR)/$(am__dirstamp)
+
+bgpd/test_aspath$(EXEEXT): $(bgpd_test_aspath_OBJECTS) $(bgpd_test_aspath_DEPENDENCIES) $(EXTRA_bgpd_test_aspath_DEPENDENCIES) bgpd/$(am__dirstamp)
+ @rm -f bgpd/test_aspath$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(bgpd_test_aspath_OBJECTS) $(bgpd_test_aspath_LDADD) $(LIBS)
+bgpd/test_capability.$(OBJEXT): bgpd/$(am__dirstamp) \
+ bgpd/$(DEPDIR)/$(am__dirstamp)
+
+bgpd/test_capability$(EXEEXT): $(bgpd_test_capability_OBJECTS) $(bgpd_test_capability_DEPENDENCIES) $(EXTRA_bgpd_test_capability_DEPENDENCIES) bgpd/$(am__dirstamp)
+ @rm -f bgpd/test_capability$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(bgpd_test_capability_OBJECTS) $(bgpd_test_capability_LDADD) $(LIBS)
+bgpd/test_ecommunity.$(OBJEXT): bgpd/$(am__dirstamp) \
+ bgpd/$(DEPDIR)/$(am__dirstamp)
+
+bgpd/test_ecommunity$(EXEEXT): $(bgpd_test_ecommunity_OBJECTS) $(bgpd_test_ecommunity_DEPENDENCIES) $(EXTRA_bgpd_test_ecommunity_DEPENDENCIES) bgpd/$(am__dirstamp)
+ @rm -f bgpd/test_ecommunity$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(bgpd_test_ecommunity_OBJECTS) $(bgpd_test_ecommunity_LDADD) $(LIBS)
+bgpd/test_mp_attr.$(OBJEXT): bgpd/$(am__dirstamp) \
+ bgpd/$(DEPDIR)/$(am__dirstamp)
+
+bgpd/test_mp_attr$(EXEEXT): $(bgpd_test_mp_attr_OBJECTS) $(bgpd_test_mp_attr_DEPENDENCIES) $(EXTRA_bgpd_test_mp_attr_DEPENDENCIES) bgpd/$(am__dirstamp)
+ @rm -f bgpd/test_mp_attr$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(bgpd_test_mp_attr_OBJECTS) $(bgpd_test_mp_attr_LDADD) $(LIBS)
+bgpd/test_mpath.$(OBJEXT): bgpd/$(am__dirstamp) \
+ bgpd/$(DEPDIR)/$(am__dirstamp)
+
+bgpd/test_mpath$(EXEEXT): $(bgpd_test_mpath_OBJECTS) $(bgpd_test_mpath_DEPENDENCIES) $(EXTRA_bgpd_test_mpath_DEPENDENCIES) bgpd/$(am__dirstamp)
+ @rm -f bgpd/test_mpath$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(bgpd_test_mpath_OBJECTS) $(bgpd_test_mpath_LDADD) $(LIBS)
+bgpd/test_packet.$(OBJEXT): bgpd/$(am__dirstamp) \
+ bgpd/$(DEPDIR)/$(am__dirstamp)
+
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+ @rm -f bgpd/test_packet$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(bgpd_test_packet_OBJECTS) $(bgpd_test_packet_LDADD) $(LIBS)
+isisd/$(am__dirstamp):
+ @$(MKDIR_P) isisd
+ @: > isisd/$(am__dirstamp)
+isisd/$(DEPDIR)/$(am__dirstamp):
+ @$(MKDIR_P) isisd/$(DEPDIR)
+ @: > isisd/$(DEPDIR)/$(am__dirstamp)
+isisd/isisd_test_fuzz_isis_tlv-test_fuzz_isis_tlv.$(OBJEXT): \
+ isisd/$(am__dirstamp) isisd/$(DEPDIR)/$(am__dirstamp)
+
+isisd/test_fuzz_isis_tlv$(EXEEXT): $(isisd_test_fuzz_isis_tlv_OBJECTS) $(isisd_test_fuzz_isis_tlv_DEPENDENCIES) $(EXTRA_isisd_test_fuzz_isis_tlv_DEPENDENCIES) isisd/$(am__dirstamp)
+ @rm -f isisd/test_fuzz_isis_tlv$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(isisd_test_fuzz_isis_tlv_OBJECTS) $(isisd_test_fuzz_isis_tlv_LDADD) $(LIBS)
+isisd/test_isis_vertex_queue.$(OBJEXT): isisd/$(am__dirstamp) \
+ isisd/$(DEPDIR)/$(am__dirstamp)
+
+isisd/test_isis_vertex_queue$(EXEEXT): $(isisd_test_isis_vertex_queue_OBJECTS) $(isisd_test_isis_vertex_queue_DEPENDENCIES) $(EXTRA_isisd_test_isis_vertex_queue_DEPENDENCIES) isisd/$(am__dirstamp)
+ @rm -f isisd/test_isis_vertex_queue$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(isisd_test_isis_vertex_queue_OBJECTS) $(isisd_test_isis_vertex_queue_LDADD) $(LIBS)
+lib/cli/$(am__dirstamp):
+ @$(MKDIR_P) lib/cli
+ @: > lib/cli/$(am__dirstamp)
+lib/cli/$(DEPDIR)/$(am__dirstamp):
+ @$(MKDIR_P) lib/cli/$(DEPDIR)
+ @: > lib/cli/$(DEPDIR)/$(am__dirstamp)
+lib/cli/test_cli.$(OBJEXT): lib/cli/$(am__dirstamp) \
+ lib/cli/$(DEPDIR)/$(am__dirstamp)
+lib/cli/common_cli.$(OBJEXT): lib/cli/$(am__dirstamp) \
+ lib/cli/$(DEPDIR)/$(am__dirstamp)
+
+lib/cli/test_cli$(EXEEXT): $(lib_cli_test_cli_OBJECTS) $(lib_cli_test_cli_DEPENDENCIES) $(EXTRA_lib_cli_test_cli_DEPENDENCIES) lib/cli/$(am__dirstamp)
+ @rm -f lib/cli/test_cli$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_cli_test_cli_OBJECTS) $(lib_cli_test_cli_LDADD) $(LIBS)
+lib/cli/test_commands_defun.$(OBJEXT): lib/cli/$(am__dirstamp) \
+ lib/cli/$(DEPDIR)/$(am__dirstamp)
+lib/cli/test_commands.$(OBJEXT): lib/cli/$(am__dirstamp) \
+ lib/cli/$(DEPDIR)/$(am__dirstamp)
+helpers/c/$(am__dirstamp):
+ @$(MKDIR_P) helpers/c
+ @: > helpers/c/$(am__dirstamp)
+helpers/c/$(DEPDIR)/$(am__dirstamp):
+ @$(MKDIR_P) helpers/c/$(DEPDIR)
+ @: > helpers/c/$(DEPDIR)/$(am__dirstamp)
+helpers/c/prng.$(OBJEXT): helpers/c/$(am__dirstamp) \
+ helpers/c/$(DEPDIR)/$(am__dirstamp)
+
+lib/cli/test_commands$(EXEEXT): $(lib_cli_test_commands_OBJECTS) $(lib_cli_test_commands_DEPENDENCIES) $(EXTRA_lib_cli_test_commands_DEPENDENCIES) lib/cli/$(am__dirstamp)
+ @rm -f lib/cli/test_commands$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_cli_test_commands_OBJECTS) $(lib_cli_test_commands_LDADD) $(LIBS)
+lib/$(am__dirstamp):
+ @$(MKDIR_P) lib
+ @: > lib/$(am__dirstamp)
+lib/$(DEPDIR)/$(am__dirstamp):
+ @$(MKDIR_P) lib/$(DEPDIR)
+ @: > lib/$(DEPDIR)/$(am__dirstamp)
+lib/test_buffer.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_buffer$(EXEEXT): $(lib_test_buffer_OBJECTS) $(lib_test_buffer_DEPENDENCIES) $(EXTRA_lib_test_buffer_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_buffer$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_buffer_OBJECTS) $(lib_test_buffer_LDADD) $(LIBS)
+lib/test_checksum.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_checksum$(EXEEXT): $(lib_test_checksum_OBJECTS) $(lib_test_checksum_DEPENDENCIES) $(EXTRA_lib_test_checksum_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_checksum$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_checksum_OBJECTS) $(lib_test_checksum_LDADD) $(LIBS)
+lib/test_heavy.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+helpers/c/main.$(OBJEXT): helpers/c/$(am__dirstamp) \
+ helpers/c/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_heavy$(EXEEXT): $(lib_test_heavy_OBJECTS) $(lib_test_heavy_DEPENDENCIES) $(EXTRA_lib_test_heavy_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_heavy$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_heavy_OBJECTS) $(lib_test_heavy_LDADD) $(LIBS)
+lib/test_heavy_thread.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_heavy_thread$(EXEEXT): $(lib_test_heavy_thread_OBJECTS) $(lib_test_heavy_thread_DEPENDENCIES) $(EXTRA_lib_test_heavy_thread_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_heavy_thread$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_heavy_thread_OBJECTS) $(lib_test_heavy_thread_LDADD) $(LIBS)
+lib/test_heavy_wq.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_heavy_wq$(EXEEXT): $(lib_test_heavy_wq_OBJECTS) $(lib_test_heavy_wq_DEPENDENCIES) $(EXTRA_lib_test_heavy_wq_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_heavy_wq$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_heavy_wq_OBJECTS) $(lib_test_heavy_wq_LDADD) $(LIBS)
+lib/test_memory.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_memory$(EXEEXT): $(lib_test_memory_OBJECTS) $(lib_test_memory_DEPENDENCIES) $(EXTRA_lib_test_memory_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_memory$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_memory_OBJECTS) $(lib_test_memory_LDADD) $(LIBS)
+lib/test_nexthop_iter.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_nexthop_iter$(EXEEXT): $(lib_test_nexthop_iter_OBJECTS) $(lib_test_nexthop_iter_DEPENDENCIES) $(EXTRA_lib_test_nexthop_iter_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_nexthop_iter$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_nexthop_iter_OBJECTS) $(lib_test_nexthop_iter_LDADD) $(LIBS)
+lib/test_privs.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_privs$(EXEEXT): $(lib_test_privs_OBJECTS) $(lib_test_privs_DEPENDENCIES) $(EXTRA_lib_test_privs_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_privs$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_privs_OBJECTS) $(lib_test_privs_LDADD) $(LIBS)
+lib/test_ringbuf.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_ringbuf$(EXEEXT): $(lib_test_ringbuf_OBJECTS) $(lib_test_ringbuf_DEPENDENCIES) $(EXTRA_lib_test_ringbuf_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_ringbuf$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_ringbuf_OBJECTS) $(lib_test_ringbuf_LDADD) $(LIBS)
+lib/test_segv.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_segv$(EXEEXT): $(lib_test_segv_OBJECTS) $(lib_test_segv_DEPENDENCIES) $(EXTRA_lib_test_segv_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_segv$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_segv_OBJECTS) $(lib_test_segv_LDADD) $(LIBS)
+lib/test_sig.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_sig$(EXEEXT): $(lib_test_sig_OBJECTS) $(lib_test_sig_DEPENDENCIES) $(EXTRA_lib_test_sig_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_sig$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_sig_OBJECTS) $(lib_test_sig_LDADD) $(LIBS)
+lib/test_srcdest_table.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_srcdest_table$(EXEEXT): $(lib_test_srcdest_table_OBJECTS) $(lib_test_srcdest_table_DEPENDENCIES) $(EXTRA_lib_test_srcdest_table_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_srcdest_table$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_srcdest_table_OBJECTS) $(lib_test_srcdest_table_LDADD) $(LIBS)
+lib/test_stream.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_stream$(EXEEXT): $(lib_test_stream_OBJECTS) $(lib_test_stream_DEPENDENCIES) $(EXTRA_lib_test_stream_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_stream$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_stream_OBJECTS) $(lib_test_stream_LDADD) $(LIBS)
+lib/test_table.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_table$(EXEEXT): $(lib_test_table_OBJECTS) $(lib_test_table_DEPENDENCIES) $(EXTRA_lib_test_table_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_table$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_table_OBJECTS) $(lib_test_table_LDADD) $(LIBS)
+lib/test_timer_correctness.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_timer_correctness$(EXEEXT): $(lib_test_timer_correctness_OBJECTS) $(lib_test_timer_correctness_DEPENDENCIES) $(EXTRA_lib_test_timer_correctness_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_timer_correctness$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_timer_correctness_OBJECTS) $(lib_test_timer_correctness_LDADD) $(LIBS)
+lib/test_timer_performance.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_timer_performance$(EXEEXT): $(lib_test_timer_performance_OBJECTS) $(lib_test_timer_performance_DEPENDENCIES) $(EXTRA_lib_test_timer_performance_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_timer_performance$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_timer_performance_OBJECTS) $(lib_test_timer_performance_LDADD) $(LIBS)
+lib/test_ttable.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_ttable$(EXEEXT): $(lib_test_ttable_OBJECTS) $(lib_test_ttable_DEPENDENCIES) $(EXTRA_lib_test_ttable_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_ttable$(EXEEXT)
+ $(AM_V_CCLD)$(LINK) $(lib_test_ttable_OBJECTS) $(lib_test_ttable_LDADD) $(LIBS)
+lib/lib_test_zmq-test_zmq.$(OBJEXT): lib/$(am__dirstamp) \
+ lib/$(DEPDIR)/$(am__dirstamp)
+
+lib/test_zmq$(EXEEXT): $(lib_test_zmq_OBJECTS) $(lib_test_zmq_DEPENDENCIES) $(EXTRA_lib_test_zmq_DEPENDENCIES) lib/$(am__dirstamp)
+ @rm -f lib/test_zmq$(EXEEXT)
+ $(AM_V_CCLD)$(lib_test_zmq_LINK) $(lib_test_zmq_OBJECTS) $(lib_test_zmq_LDADD) $(LIBS)
+ospf6d/$(am__dirstamp):
+ @$(MKDIR_P) ospf6d
+ @: > ospf6d/$(am__dirstamp)
+ospf6d/$(DEPDIR)/$(am__dirstamp):
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+ $(MAKE) -C ../vtysh vtysh_cmd.c
+
+lib/cli/test_commands_defun.c: ../vtysh/vtysh_cmd.c
+ sed \
+ -e 's/"vtysh\.h"/"tests.h"/' \
+ -e 's/vtysh_init_cmd/test_init_cmd/' \
+ -e 's/VTYSH_[A-Z][A-Z_0-9]*/0/g' \
+ < ../vtysh/vtysh_cmd.c \
+ > "$@"
+
+isisd/test_fuzz_isis_tlv_tests.h: $(top_srcdir)/tests/isisd/test_fuzz_isis_tlv_tests.h.gz
+ gzip -d < $(top_srcdir)/tests/isisd/test_fuzz_isis_tlv_tests.h.gz > "$@"
+isisd/isisd_test_fuzz_isis_tlv-test_fuzz_isis_tlv.$(OBJEXT): \
+ isisd/test_fuzz_isis_tlv_tests.h
+
+.PHONY: tests.xml
+tests.xml: $(check_PROGRAMS)
+ $(PYTHON) $(srcdir)/runtests.py --junitxml=$@ -v $(srcdir)
+check: tests.xml
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
+++ /dev/null
-# Guidelines
-
-This document describes how to use the topotests testing framework.
-
-
-## Executing Tests
-
-To run the whole suite of tests the following commands must be executed at the
-top level directory of topotest:
-
-```shell
-$ # Change to the top level directory of topotests.
-$ cd path/to/topotests
-$ # Tests must be run as root, since Mininet requires it.
-$ sudo pytest
-```
-
-In order to run a specific test, you can use the following command:
-
-```shell
-$ # running a specific topology
-$ sudo pytest ospf-topo1/
-$ # or inside the test folder
-$ cd ospf-topo1
-$ sudo pytest # to run all tests inside the directory
-$ sudo pytest test_ospf_topo1.py # to run a specific test
-$ # or outside the test folder
-$ cd ..
-$ sudo pytest ospf-topo1/test_ospf_topo1.py # to run a specific one
-```
-
-The output of the tested daemons will be available at the temporary folder of
-your machine:
-
-```shell
-$ ls /tmp/topotest/ospf-topo1.test_ospf-topo1/r1
-...
-zebra.err # zebra stderr output
-zebra.log # zebra log file
-zebra.out # zebra stdout output
-...
-```
-
-You can also run memory leak tests to get reports:
-
-```shell
-$ # Set the environment variable to apply to a specific test...
-$ sudo env TOPOTESTS_CHECK_MEMLEAK="/tmp/memleak_report_" pytest ospf-topo1/test_ospf_topo1.py
-$ # ...or apply to all tests adding this line to the configuration file
-$ echo 'memleak_path = /tmp/memleak_report_' >> pytest.ini
-$ # You can also use your editor
-$ $EDITOR pytest.ini
-$ # After running tests you should see your files:
-$ ls /tmp/memleak_report_*
-memleak_report_test_ospf_topo1.txt
-```
-
-
-## Writing a New Test
-
-This section will guide you in all recommended steps to produce a standard
-topology test.
-
-This is the recommended test writing routine:
-
-* Write a topology (Graphviz recommended)
-* Obtain configuration files
-* Write the test itself
-* Create a Pull Request
-
-
-### Topotest File Hierarchy
-
-Before starting to write any tests one must know the file hierarchy. The
-repository hierarchy looks like this:
-
-```shell
-$ cd path/to/topotest
-$ find ./*
-...
-./README.md # repository read me
-./GUIDELINES.md # this file
-./conftest.py # test hooks - pytest related functions
-./example-test # example test folder
-./example-test/__init__.py # python package marker - must always exist.
-./example-test/test_template.jpg # generated topology picture - see next section
-./example-test/test_template.dot # Graphviz dot file
-./example-test/test_template.py # the topology plus the test
-...
-./ospf-topo1 # the ospf topology test
-./ospf-topo1/r1 # router 1 configuration files
-./ospf-topo1/r1/zebra.conf # zebra configuration file
-./ospf-topo1/r1/ospfd.conf # ospf configuration file
-./ospf-topo1/r1/ospfroute.txt # 'show ip ospf' output reference file
-# removed other for shortness sake
-...
-./lib # shared test/topology functions
-./lib/topogen.py # topogen implementation
-./lib/topotest.py # topotest implementation
-```
-
-Guidelines for creating/editing topotest:
-
-* New topologies that don't fit the existing directories should create its own
-* Always remember to add the `__init__.py` to new folders, this makes auto
- complete engines and pylint happy
-* Router (Quagga/FRR) specific code should go on topotest.py
-* Generic/repeated router actions should have an abstraction in
- topogen.TopoRouter.
-* Generic/repeated non-router code should go to topotest.py
-* pytest related code should go to conftest.py (e.g. specialized asserts)
-
-
-### Defining the Topology
-
-The first step to write a new test is to define the topology. This step can be
-done in many ways, but the recommended is to use Graphviz to generate a drawing
-of the Topology. It allows us to see the topology graphically and to see the
-names of equipments, links and addresses.
-
-Here is an example of Graphviz dot file that generates the
-[template topology](example-test/test_template.dot) (the inlined code might get
-outdated, please see the linked file):
-
-```dot
-graph template {
- label="template";
-
- # Routers
- r1 [
- shape=doubleoctagon,
- label="r1",
- fillcolor="#f08080",
- style=filled,
- ];
- r2 [
- shape=doubleoctagon,
- label="r2",
- fillcolor="#f08080",
- style=filled,
- ];
-
- # Switches
- s1 [
- shape=oval,
- label="s1\n192.168.0.0/24",
- fillcolor="#d0e0d0",
- style=filled,
- ];
- s2 [
- shape=oval,
- label="s2\n192.168.1.0/24",
- fillcolor="#d0e0d0",
- style=filled,
- ];
-
- # Connections
- r1 -- s1 [label="eth0\n.1"];
-
- r1 -- s2 [label="eth1\n.100"];
- r2 -- s2 [label="eth0\n.1"];
-}
-```
-
-Here is the produced graph:
-
-
-
-
-### Generating / Obtaining Configuration Files
-
-In order to get the configuration files or command output for each router, we
-need to run the topology and execute commands in vtysh. The quickest way to
-achieve that is writing the topology building code and running the topology.
-
-To bootstrap your test topology, do the following steps:
-
-* Copy the template test
-
-```shell
-$ mkdir new-topo/
-$ touch new-topo/__init__.py
-$ cp example-test/test_template.py new-topo/test_new_topo.py
-```
-
-* Modify the template according to your dot file
-
-Here is the template topology described in the previous section in python code:
-
-```py
-class TemplateTopo(Topo):
- "Test topology builder"
- def build(self, *_args, **_opts):
- "Build function"
- tgen = get_topogen(self)
-
- # Create 2 routers
- for routern in range(1, 3):
- tgen.add_router('r{}'.format(routern))
-
- # Create a switch with just one router connected to it to simulate a
- # empty network.
- switch = tgen.add_switch('s1')
- switch.add_link(tgen.gears['r1'])
-
- # Create a connection between r1 and r2
- switch = tgen.add_switch('s2')
- switch.add_link(tgen.gears['r1'])
- switch.add_link(tgen.gears['r2'])
-```
-
-* Run the topology
-
-Topogen allows us to run the topology without running any tests, you can do that
-using the following example commands:
-
-```shell
-$ # Running your bootstraped topology
-$ sudo pytest -s --topology-only new-topo/test_new_topo.py
-$ # Running the test_template.py topology
-$ sudo pytest -s --topology-only example-test/test_template.py
-$ # Running the ospf_topo1.py topology
-$ sudo pytest -s --topology-only ospf-topo1/test_ospf_topo1.py
-```
-
-Parameters explanation:
-
-* `-s`: actives input/output capture. This is required by mininet in order to show
- the interactive shell.
-* `--topology-only`: don't run any tests, just build the topology.
-
-After executing the commands above, you should get the following terminal
-output:
-
-```shell
-=== test session starts ===
-platform linux2 -- Python 2.7.12, pytest-3.1.2, py-1.4.34, pluggy-0.4.0
-rootdir: /media/sf_src/topotests, inifile: pytest.ini
-collected 3 items
-
-ospf-topo1/test_ospf_topo1.py *** Starting controller
-
-*** Starting 6 switches
-switch1 switch2 switch3 switch4 switch5 switch6 ...
-r2: frr zebra started
-r2: frr ospfd started
-r3: frr zebra started
-r3: frr ospfd started
-r1: frr zebra started
-r1: frr ospfd started
-r4: frr zebra started
-r4: frr ospfd started
-*** Starting CLI:
-mininet>
-```
-
-The last line shows us that we are now using the Mininet CLI (Command Line
-Interface), from here you can call your router vtysh or even bash.
-
-Here are some commands example:
-
-```shell
-mininet> r1 ping 10.0.3.1
-PING 10.0.3.1 (10.0.3.1) 56(84) bytes of data.
-64 bytes from 10.0.3.1: icmp_seq=1 ttl=64 time=0.576 ms
-64 bytes from 10.0.3.1: icmp_seq=2 ttl=64 time=0.083 ms
-64 bytes from 10.0.3.1: icmp_seq=3 ttl=64 time=0.088 ms
-^C
---- 10.0.3.1 ping statistics ---
-3 packets transmitted, 3 received, 0% packet loss, time 1998ms
-rtt min/avg/max/mdev = 0.083/0.249/0.576/0.231 ms
-
-
-
-mininet> r1 ping 10.0.3.3
-PING 10.0.3.3 (10.0.3.3) 56(84) bytes of data.
-64 bytes from 10.0.3.3: icmp_seq=1 ttl=64 time=2.87 ms
-64 bytes from 10.0.3.3: icmp_seq=2 ttl=64 time=0.080 ms
-64 bytes from 10.0.3.3: icmp_seq=3 ttl=64 time=0.091 ms
-^C
---- 10.0.3.3 ping statistics ---
-3 packets transmitted, 3 received, 0% packet loss, time 2003ms
-rtt min/avg/max/mdev = 0.080/1.014/2.872/1.313 ms
-
-
-
-mininet> r3 vtysh
-
-Hello, this is FRRouting (version 3.1-devrzalamena-build).
-Copyright 1996-2005 Kunihiro Ishiguro, et al.
-
-frr-1# show running-config
-Building configuration...
-
-Current configuration:
-!
-frr version 3.1-devrzalamena-build
-frr defaults traditional
-hostname r3
-no service integrated-vtysh-config
-!
-log file zebra.log
-!
-log file ospfd.log
-!
-interface r3-eth0
- ip address 10.0.3.1/24
-!
-interface r3-eth1
- ip address 10.0.10.1/24
-!
-interface r3-eth2
- ip address 172.16.0.2/24
-!
-router ospf
- ospf router-id 10.0.255.3
- redistribute kernel
- redistribute connected
- redistribute static
- network 10.0.3.0/24 area 0
- network 10.0.10.0/24 area 0
- network 172.16.0.0/24 area 1
-!
-line vty
-!
-end
-frr-1#
-```
-
-After you successfully configured your topology, you can obtain the
-configuration files (per-daemon) using the following commands:
-
-```shell
-mininet> r3 vtysh -d ospfd
-
-Hello, this is FRRouting (version 3.1-devrzalamena-build).
-Copyright 1996-2005 Kunihiro Ishiguro, et al.
-
-frr-1# show running-config
-Building configuration...
-
-Current configuration:
-!
-frr version 3.1-devrzalamena-build
-frr defaults traditional
-no service integrated-vtysh-config
-!
-log file ospfd.log
-!
-router ospf
- ospf router-id 10.0.255.3
- redistribute kernel
- redistribute connected
- redistribute static
- network 10.0.3.0/24 area 0
- network 10.0.10.0/24 area 0
- network 172.16.0.0/24 area 1
-!
-line vty
-!
-end
-frr-1#
-```
-
-
-### Writing Tests
-
-Test topologies should always be bootstrapped from the
-[example-test/test_template.py](example-test/test_template.py),
-because it contains important boilerplate code that can't be avoided, like:
-
-* imports: os, sys, pytest, topotest/topogen and mininet topology class
-* The global variable CWD (Current Working directory): which is most likely
- going to be used to reference the routers configuration file location
-
- Example:
-
-```py
-# For all registered routers, load the zebra configuration file
-for rname, router in router_list.iteritems():
- router.load_config(
- TopoRouter.RD_ZEBRA,
- os.path.join(CWD, '{}/zebra.conf'.format(rname))
- )
- # os.path.join() joins the CWD string with arguments adding the necessary
- # slashes ('/'). Arguments must not begin with '/'.
-```
-
-* The topology class that inherits from Mininet Topo class
-
-```py
-class TemplateTopo(Topo):
- def build(self, *_args, **_opts):
- tgen = get_topogen(self)
- # topology build code
-```
-
-* pytest `setup_module()` and `teardown_module()` to start the topology
-
-```py
-def setup_module(_m):
- tgen = Topogen(TemplateTopo)
- tgen.start_topology('debug')
-
-def teardown_module(_m):
- tgen = get_topogen()
- tgen.stop_topology()
-```
-
-* `__main__` initialization code (to support running the script directly)
-
-```py
-if __name__ == '__main__':
- sys.exit(pytest.main(["-s"]))
-```
-
-Requirements:
-
-* Test code should always be declared inside functions that begin with the
- `test_` prefix. Functions beginning with different prefixes will not be run by
- pytest.
-* Configuration files and long output commands should go into separated files
- inside folders named after the equipment.
-* Tests must be able to run without any interaction. To make sure your test
- conforms with this, run it without the `-s` parameter.
-
-Tips:
-
-* Keep results in stack variables, so people inspecting code with `pdb` can
- easily print their values.
-
- Don't do this:
-
- ```py
- assert foobar(router1, router2)
- ```
-
- Do this instead:
-
- ```py
- result = foobar(router1, router2)
- assert result
- ```
-
-* Use `assert` messages to indicate where the test failed.
-
- Example:
-
- ```py
- for router in router_list:
- # ...
- assert condition, 'Router "{}" condition failed'.format(router.name)
- ```
-
-
-### Debugging Execution
-
-The most effective ways to inspect topology tests are:
-
-* Run pytest with `--pdb` option. This option will cause a pdb shell to appear
- when an assertion fails
-
- Example: `pytest -s --pdb ospf-topo1/test_ospf_topo1.py`
-
-* Set a breakpoint in the test code with `pdb`
-
- Example:
-
-```py
-# Add the pdb import at the beginning of the file
-import pdb
-# ...
-
-# Add a breakpoint where you think the problem is
-def test_bla():
- # ...
- pdb.set_trace()
- # ...
-```
-
-The [Python Debugger](https://docs.python.org/2.7/library/pdb.html) (pdb) shell
-allows us to run many useful operations like:
-
-* Setting breaking point on file/function/conditions (e.g. `break`, `condition`)
-* Inspecting variables (e.g. `p` (print), `pp` (pretty print))
-* Running python code
-
-TIP: The TopoGear (equipment abstraction class) implements the `__str__` method
-that allows the user to inspect equipment information.
-
-Example of pdb usage:
-
-```shell
-> /media/sf_src/topotests/ospf-topo1/test_ospf_topo1.py(121)test_ospf_convergence()
--> for rnum in range(1, 5):
-(Pdb) help
-Documented commands (type help <topic>):
-========================================
-EOF bt cont enable jump pp run unt
-a c continue exit l q s until
-alias cl d h list quit step up
-args clear debug help n r tbreak w
-b commands disable ignore next restart u whatis
-break condition down j p return unalias where
-
-Miscellaneous help topics:
-==========================
-exec pdb
-
-Undocumented commands:
-======================
-retval rv
-
-(Pdb) list
-116 title2="Expected output")
-117
-118 def test_ospf_convergence():
-119 "Test OSPF daemon convergence"
-120 pdb.set_trace()
-121 -> for rnum in range(1, 5):
-122 router = 'r{}'.format(rnum)
-123
-124 # Load expected results from the command
-125 reffile = os.path.join(CWD, '{}/ospfroute.txt'.format(router))
-126 expected = open(reffile).read()
-(Pdb) step
-> /media/sf_src/topotests/ospf-topo1/test_ospf_topo1.py(122)test_ospf_convergence()
--> router = 'r{}'.format(rnum)
-(Pdb) step
-> /media/sf_src/topotests/ospf-topo1/test_ospf_topo1.py(125)test_ospf_convergence()
--> reffile = os.path.join(CWD, '{}/ospfroute.txt'.format(router))
-(Pdb) print rnum
-1
-(Pdb) print router
-r1
-(Pdb) tgen = get_topogen()
-(Pdb) pp tgen.gears[router]
-<lib.topogen.TopoRouter object at 0x7f74e06c9850>
-(Pdb) pp str(tgen.gears[router])
-'TopoGear<name="r1",links=["r1-eth0"<->"s1-eth0","r1-eth1"<->"s3-eth0"]> TopoRouter<>'
-(Pdb) l 125
-120 pdb.set_trace()
-121 for rnum in range(1, 5):
-122 router = 'r{}'.format(rnum)
-123
-124 # Load expected results from the command
-125 -> reffile = os.path.join(CWD, '{}/ospfroute.txt'.format(router))
-126 expected = open(reffile).read()
-127
-128 # Run test function until we get an result. Wait at most 60 seconds.
-129 test_func = partial(compare_show_ip_ospf, router, expected)
-130 result, diff = topotest.run_and_expect(test_func, '',
-(Pdb) router1 = tgen.gears[router]
-(Pdb) router1.vtysh_cmd('show ip ospf route')
-'============ OSPF network routing table ============\r\nN 10.0.1.0/24 [10] area: 0.0.0.0\r\n directly attached to r1-eth0\r\nN 10.0.2.0/24 [20] area: 0.0.0.0\r\n via 10.0.3.3, r1-eth1\r\nN 10.0.3.0/24 [10] area: 0.0.0.0\r\n directly attached to r1-eth1\r\nN 10.0.10.0/24 [20] area: 0.0.0.0\r\n via 10.0.3.1, r1-eth1\r\nN IA 172.16.0.0/24 [20] area: 0.0.0.0\r\n via 10.0.3.1, r1-eth1\r\nN IA 172.16.1.0/24 [30] area: 0.0.0.0\r\n via 10.0.3.1, r1-eth1\r\n\r\n============ OSPF router routing table =============\r\nR 10.0.255.2 [10] area: 0.0.0.0, ASBR\r\n via 10.0.3.3, r1-eth1\r\nR 10.0.255.3 [10] area: 0.0.0.0, ABR, ASBR\r\n via 10.0.3.1, r1-eth1\r\nR 10.0.255.4 IA [20] area: 0.0.0.0, ASBR\r\n via 10.0.3.1, r1-eth1\r\n\r\n============ OSPF external routing table ===========\r\n\r\n\r\n'
-(Pdb) tgen.mininet_cli()
-*** Starting CLI:
-mininet>
-```
-
-To enable more debug messages in other Topogen subsystems (like Mininet), more
-logging messages can be displayed by modifying the test configuration file
-`pytest.ini`:
-
-```ini
-[topogen]
-# Change the default verbosity line from 'info'...
-#verbosity = info
-# ...to 'debug'
-verbosity = debug
-```
-# FRRouting Topology Tests with Mininet
-
-## Running tests with docker
-
-There is a docker image which allows to run topotests. Instructions can be
-found [here](docker/README.md).
-
-## Guidelines
-
-Instructions for use, write or debug topologies can be found in the
-[guidelines](GUIDELINES.md). To learn/remember common code snippets see
-[here](SNIPPETS.md).
-
-Before creating a new topology, make sure that there isn't one already
-that does what you need. If nothing is similar, then you may create a
-new topology, preferably, using the newest
-[template](example-test/test_template.py).
-
-## Installation of Mininet for running tests
-Only tested with Ubuntu 16.04 and Ubuntu 18.04 (which uses Mininet 2.2.x)
-
-Instructions are the same for all setups (ie ExaBGP is only used for BGP
-tests)
-
-### Installing Mininet Infrastructure:
-
-1. apt-get install mininet
-2. apt-get install python-pip
-3. apt-get install iproute
-4. pip install ipaddr
-5. pip install pytest
-6. pip install exabgp==3.4.17
- (Newer 4.0 version of exabgp is not yet supported)
-7. useradd -d /var/run/exabgp/ -s /bin/false exabgp
-
-### Enable Coredumps
-Optional, will give better output
-
-1. apt-get install gdb
-2. disable apport (which move core files)
-
- Set `enabled=0` in `/etc/default/apport`
-
-3. Update security limits
-
- Add/change `/etc/security/limits.conf` to
-
- #<domain> <type> <item> <value>
- * soft core unlimited
- root soft core unlimited
- * hard core unlimited
- root hard core unlimited
-
-4. reboot (for options to take effect)
-
-## FRRouting (FRR) Installation
-FRR needs to be installed separatly. It is assume to be configured
-like the standard Ubuntu Packages:
-
-- Binaries in /usr/lib/frr
-- State Directory /var/run/frr
-- Running under user frr, group frr
-- vtygroup: frrvty
-- config directory: /etc/frr
-- For FRR Packages, install the dbg package as well for coredump decoding
-
-No FRR config needs to be done and no FRR daemons should be run ahead
-of the test. They are all started as part of the test
-
-#### Manual FRRouting (FRR) build
-
-If you prefer to manually build FRR, then use the following suggested config:
-
- ./configure \
- --prefix=/usr \
- --localstatedir=/var/run/frr \
- --sbindir=/usr/lib/frr \
- --sysconfdir=/etc/frr \
- --enable-vtysh \
- --enable-pimd \
- --enable-multipath=64 \
- --enable-user=frr \
- --enable-group=frr \
- --enable-vty-group=frrvty \
- --with-pkg-extra-version=-my-manual-build
-
-And create frr User and frrvty group as follows:
-
- addgroup --system --gid 92 frr
- addgroup --system --gid 85 frrvty
- adduser --system --ingroup frr --home /var/run/frr/ \
- --gecos "FRRouting suite" --shell /bin/false frr
- usermod -G frrvty frr
-
-## Executing Tests
-
-#### Execute all tests with output to console
-
- py.test -s -v --tb=no
-
-All test_* scripts in subdirectories are detected and executed (unless
-disabled in `pytest.ini` file)
-
-`--tb=no` disables the python traceback which might be irrelevant unless the
-test script itself is debugged
-
-#### Execute single test
-
- cd test_to_be_run
- ./test_to_be_run.py
-
-For further options, refer to pytest documentation
-
-Test will set exit code which can be used with `git bisect`
-
-For the simulated topology, see the description in the python file
-
-If you need to clear the mininet setup between tests (if it isn't cleanly
-shutdown), then use the `mn -c` command to clean up the environment
-
-#### (Optional) StdErr log from daemos after exit
-
-To enable the reporting of any messages seen on StdErr after the
-daemons exit, the following env variable can be set.
-
- export TOPOTESTS_CHECK_STDERR=Yes
-
-(The value doesn't matter at this time. The check is if the env variable
-exists or not)
-There is no pass/fail on this reporting. The Output will be reported to
-the console
-
- export TOPOTESTS_CHECK_MEMLEAK="/home/mydir/memleak_"
-
-This will enable the check and output to console and the writing of
-the information to files with the given prefix (followed by testname),
-ie `/home/mydir/memcheck_test_bgp_multiview_topo1.txt` in case of a
-memory leak.
-
-#### (Optional) Collect Memory Leak Information
-
-FreeRangeRouting processes have the capabilities to report remaining memory
-allocations upon exit. To enable the reporting of the memory, define an
-enviroment variable `TOPOTESTS_CHECK_MEMLEAK` with the file prefix, ie
-
- export TOPOTESTS_CHECK_MEMLEAK="/home/mydir/memleak_"
-
-This will enable the check and output to console and the writing of
-the information to files with the given prefix (followed by testname),
-ie `/home/mydir/memcheck_test_bgp_multiview_topo1.txt` in case of a
-memory leak.
-
-#### (Optional) Run topotests with GCC AddressSanitizer enabled
-
-Topotests can be run with the GCC AddressSanitizer. It requires GCC 4.8 or
-newer. (Ubuntu 16.04 as suggested here is fine with GCC 5 as default)
-For more information on AddressSanitizer, see
-https://github.com/google/sanitizers/wiki/AddressSanitizer
-
-The checks are done automatically in the library call of `checkRouterRunning`
-(ie at beginning of tests when there is a check for all daemons running).
-No changes or extra configuration for topotests is required beside compiling
-the suite with AddressSanitizer enabled.
-
-If a daemon crashed, then the errorlog is checked for AddressSanitizer
-output. If found, then this is added with context (calling test) to
-`/tmp/AddressSanitizer.txt` in markdown compatible format.
-
-Compiling for GCC AddressSanitizer requires to use gcc as a linker as well
-(instead of ld). Here is a suggest way to compile frr with AddressSanitizer
-for `stable/3.0` branch:
-
- git clone https://github.com/FRRouting/frr.git
- cd frr
- git checkout stable/3.0
- ./bootstrap.sh
- export CC=gcc
- export CFLAGS="-O1 -g -fsanitize=address -fno-omit-frame-pointer"
- export LD=gcc
- export LDFLAGS="-g -fsanitize=address -ldl"
- ./configure --enable-shared=no \
- --prefix=/usr/lib/frr --sysconfdir=/etc/frr \
- --localstatedir=/var/run/frr \
- --sbindir=/usr/lib/frr --bindir=/usr/lib/frr \
- --enable-exampledir=/usr/lib/frr/examples \
- --with-moduledir=/usr/lib/frr/modules \
- --enable-multipath=0 --enable-rtadv \
- --enable-tcp-zebra --enable-fpm --enable-pimd
- make
- sudo make install
- # Create symlink for vtysh, so topotest finds it in /usr/lib/frr
- sudo ln -s /usr/lib/frr/vtysh /usr/bin/
-
-and create `frr` user and `frrvty` group as shown above
-
-## License
-
-All the configs and scripts are licensed under a ISC-style license. See
-Python scripts for details.
+Documentation is located in /doc/developer/topotests.rst
+++ /dev/null
-# Snippets
-
-This document will describe common snippets of code that are frequently
-needed to perform some test checks.
-
-
-## Checking for router / test failures
-
-The following check uses the topogen API to check for software failure
-(e.g. zebra died) and/or for errors manually set by `Topogen.set_error()`.
-
-```py
-# Get the topology reference
-tgen = get_topogen()
-
-# Check for errors in the topology
-if tgen.routers_have_failure():
- # Skip the test with the topology errors as reason
- pytest.skip(tgen.errors)
-```
-
-
-## Checking FRR routers version
-
-This code snippet is usually run after the topology setup to make sure
-all routers instantiated in the topology have the correct software
-version.
-
-```py
-# Get the topology reference
-tgen = get_topogen()
-
-# Get the router list
-router_list = tgen.routers()
-
-# Run the check for all routers
-for router in router_list.values():
- if router.has_version('<', '3'):
- # Set topology error, so the next tests are skipped
- tgen.set_error('unsupported version')
-```
-
-A sample of this snippet in a test can be found
-[here](ldp-vpls-topo1/test_ldp_vpls_topo1.py).
-
-
-## Interacting with equipments
-
-You might want to interact with the topology equipments during the tests
-and there are different ways to do so.
-
-Notes:
-
-1.
-> When using the Topogen API, all the equipments code derive from
-> `Topogear` ([lib/topogen.py](lib/topogen.py)). If you feel brave you
-> can look by yourself how the abstractions that will be mentioned here
-> works.
-
-2.
-> When not using the `Topogen` API there is only one way to interact
-> with the equipments, which is by calling the `mininet` API functions
-> directly to spawn commands.
-
-
-### Interacting with the Linux sandbox
-
-*Without `Topogen`*
-
-```py
-global net
-output = net['r1'].cmd('echo "foobar"')
-print 'output is: {}'.format(output)
-```
-
----
-
-*With `Topogen`*
-
-```py
-tgen = get_topogen()
-output = tgen.gears['r1'].run('echo "foobar"')
-print 'output is: {}'.format(output)
-```
-
-
-### Interacting with VTYSH
-
-*Without `Topogen`*
-
-```py
-global net
-output = net['r1'].cmd('vtysh "show ip route" 2>/dev/null')
-print 'output is: {}'.format(output)
-```
-
----
-
-*With `Topogen`*
-
-```py
-tgen = get_topogen()
-output = tgen.gears['r1'].vtysh_cmd("show ip route")
-print 'output is: {}'.format(output)
-```
-
-`Topogen` also supports sending multiple lines of command:
-
-```py
-tgen = get_topogen()
-output = tgen.gears['r1'].vtysh_cmd("""
-configure terminal
-router bgp 10
- bgp router-id 10.0.255.1
- neighbor 1.2.3.4 remote-as 10
- !
-router bgp 11
- bgp router-id 10.0.255.2
- !
-""")
-print 'output is: {}'.format(output)
-```
-
-You might also want to run multiple commands and get only the commands
-that failed:
-
-```py
-tgen = get_topogen()
-output = tgen.gears['r1'].vtysh_multicmd("""
-configure terminal
-router bgp 10
- bgp router-id 10.0.255.1
- neighbor 1.2.3.4 remote-as 10
- !
-router bgp 11
- bgp router-id 10.0.255.2
- !
-""", pretty_output=false)
-print 'output is: {}'.format(output)
-```
-
-Translating vtysh JSON output into Python structures:
-```py
-tgen = get_topogen()
-json_output = tgen.gears['r1'].vtysh_cmd("show ip route json", isjson=True)
-output = json.dumps(json_output, indent=4)
-print 'output is: {}'.format(output)
-
-# You can also access the data structure as normal. For example:
-# protocol = json_output['1.1.1.1/32']['protocol']
-# assert protocol == "ospf", "wrong protocol"
-```
-
-*NOTE:* `vtysh_(multi)cmd` is only available for router type of
-equipments.
-
-
-### Invoking `mininet` CLI
-
-*Without `Topogen`*
-
-```py
-CLI(net)
-```
-
----
-
-*With `Topogen`*
-```py
-tgen = get_topogen()
-tgen.mininet_cli()
-```
-
-
-## Reading files
-
-Loading a normal text file content in the current directory:
-
-```py
-# If you are using Topogen
-# CURDIR = CWD
-#
-# Otherwise find the directory manually:
-CURDIR = os.path.dirname(os.path.realpath(__file__))
-
-file_name = '{}/r1/show_ip_route.txt'.format(CURDIR)
-file_content = open(file_name).read()
-```
-
-Loading JSON from a file:
-
-```py
-import json
-
-file_name = '{}/r1/show_ip_route.json'.format(CURDIR)
-file_content = json.loads(open(file_name).read())
-```
-
-
-## Comparing JSON output
-
-After obtaining JSON output formated with Python data structures, you
-may use it to assert a minimalist schema:
-
-```py
-tgen = get_topogen()
-json_output = tgen.gears['r1'].vtysh_cmd("show ip route json", isjson=True)
-
-expect = {
- '1.1.1.1/32': {
- 'protocol': 'ospf'
- }
-}
-
-assertmsg = "route 1.1.1.1/32 was not learned through OSPF"
-assert json_cmp(json_output, expect) is None, assertmsg
-```
-
-`json_cmp` function description (it might be outdated, you can find the
-latest description in the source code at [lib/topotest.py](lib/topotest.py)):
-
-```text
- JSON compare function. Receives two parameters:
- * `d1`: json value
- * `d2`: json subset which we expect
-
- Returns `None` when all keys that `d1` has matches `d2`,
- otherwise a string containing what failed.
-
- Note: key absence can be tested by adding a key with value `None`.
-```
-
-
-## Pausing execution
-
-Preferably, choose the `sleep` function that `topotest` provides, as it
-prints a notice during the test execution to help debug topology test
-execution time.
-
-```py
-# Using the topotest sleep
-from lib import topotest
-
-topotest.sleep(10, 'waiting 10 seconds for bla')
-# or just tell it the time:
-# topotest.sleep(10)
-# It will print 'Sleeping for 10 seconds'.
-
-# Or you can also use the Python sleep, but it won't show anything
-from time import sleep
-sleep(5)
-```
-
-
-## `ip route` Linux command as JSON
-
-`topotest` has two helpers implemented that parses the output of
-`ip route` commands to JSON. It might simplify your comparison needs by
-only needing to provide a Python dictionary.
-
-```py
-from lib import topotest
-
-tgen = get_topogen()
-routes = topotest.ip4_route(tgen.gears['r1'])
-expected = {
- '10.0.1.0/24': {},
- '10.0.2.0/24': {
- 'dev': 'r1-eth0'
- }
-}
-
-assertmsg = "failed to find 10.0.1.0/24 and/or 10.0.2.0/24"
-assert json_cmp(routes, expected) is None, assertmsg
-```
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