commit	35706badfa6280e6c89838efe6d05f351009e9eb	[log] [tgz]
author	Hardik Windlass <hardik_windlass@infosys.com>	Thu Feb 20 08:16:42 2020 +0000
committer	Hardik Windlass <hardik_windlass@infosys.com>	Fri Feb 21 08:41:56 2020 +0000
tree	fd912831f23f647558cab8946e9c061dfa703ae8
parent	030059146e840f12f5a3d2ee648ddc17747a7916 [diff]

tree: fd912831f23f647558cab8946e9c061dfa703ae8

README.md

VOLTHA System Tests

Automated test-suites to validate the stability/functionality of VOLTHA. Tests that reside in here should be written in Robot Framework and Python.

Intended use includes:

Functional testing
Integration and Acceptance testing
Sanity and Regression testing
Scale Testing using BBSIM
Failure scenario testing

Learn more about VOLTHA System Test in Test Automation Brigade.

Prerequisites

Python 3.5 or later and virtualenv
voltctl - a command line tool to access VOLTHA. Reference - voltctl
kubectl - a command line tool to access your Kubernetes Clusters. Reference: kubectl
voltctl and kubectl must be properly configured on your system prior to any test executions. The kind-voltha environment will install and configure these tools for you; see below.

Directory is structured as follows:

├── tests
  └── functional/       // feature/functionality tests that should be implemented as new features get developed
└── libraries           // shared test keywords (functions) across various test suites
└── variables           // shared variables across various test suites

Setting up a test environment

An easy way to bring up VOLTHA + BBSim for testing is by using kind-voltha. To set up a minimal environment, first install Docker and the Go programming language. Then run the following commands:

NOTE: Please make sure you are able to run the docker command (your user is in the docker group)

The testing environment will be setup in the kubernetes cluster and you can use your own one or use the one provided by kind-voltha.

If you doesn't have a kubernetes cluster, please use the following command to set up the kubernetes cluster and install required packages.

git clone https://github.com/ciena/kind-voltha
cd kind-voltha
EXTRA_HELM_FLAGS="--set defaults.image_tag=master" TYPE=minimal WITH_RADIUS=y WITH_BBSIM=y INSTALL_ONOS_APPS=y CONFIG_SADIS=y ./voltha up
source minimal-env.sh

If you prefer to use your own kubernetes cluster, please read the document kind-voltha configuration options first to see how to configure the kind-voltha installation behavior.

Recommended software versions

Helm: v2.14.3 Kubernetes: v1.15.0 KIND: v0.4.0

You can skip the installation of kubernetes cluster and helm server/client by setting environment variables.

For example, using the following command to install VOLTHA required packages only.

git clone https://github.com/ciena/kind-voltha
cd kind-voltha
EXTRA_HELM_FLAGS="--set defaults.image_tag=master" TYPE=minimal WITH_RADIUS=y WITH_BBSIM=y INSTALL_ONOS_APPS=y CONFIG_SADIS=y DEPLOY_K8S=no INSTALL_KUBECTL=no INSTALL_HELM=no ./voltha up
source minimal-env.sh

The defaults.image_tag value above is used to specify which VOLTHA branch images to pull from Docker Hub.

See all available versions in Docker voltha.

DT Workflow

If you want to install voltha for the DT Workflow, add WITH_RADIUS=n WITH_EAPOL=n WITH_DHCP=n WITH_IGMP=n CONFIG_SADIS=n flags in the command.

Debug the kind-voltha installation

If you meet any issues when you set up the VOLTHA testing environment by running voltha up.

You can see the installation logs from the file kind-voltha/install-$TYPE.log.

The $TYPE should be full or minimal, depending on the variable you used in voltah up, e.g, install-minimal.

Running the sanity tests

Assuming that you have brought up VOLTHA as described above, to run the sanity tests run:

git clone https://github.com/opencord/voltha-system-tests
make -C voltha-system-tests sanity-kind

DT Workflow

To run the sanity tests for the DT Workflow, use sanity-kind-dt as the make target.

git clone https://github.com/opencord/voltha-system-tests
make -C voltha-system-tests sanity-kind-dt

This test execution will generate three report files in voltha-system-tests/tests/sanity (output.xml, report.html, log.html). View the report.html page in a browser to analyze the results.

If you're running on a remote system, you can start a web server with python3 -m http.server.

Test variables

The make sanity-kind target is equivalent to the following:

ROBOT_PORT_ARGS="-v ONOS_REST_PORT:8181 -v ONOS_SSH_PORT:8101" \
ROBOT_TEST_ARGS="--exclude notready --critical sanity" \
ROBOT_MISC_ARGS="-v num_onus:1" \
make sanity

If you are running the tests in another environment, you can run make sanity with the arguments appropriate for your environment. Look at variables.robot for a list of variables that you may need to override.

Running Tests on Physical POD

Assuming that a POD is available with all the required hardware and connections, we can deploy the POD by following the procedure in this section below.

Deploying POD

Deploying POD can be either manual or automated using Jenkins job.

You can install it manually by following these steps below.

git clone https://github.com/ciena/kind-voltha.git
cd kind-voltha/
EXTRA_HELM_FLAGS='-f <PATH_TO_YOUR_K8S_CONFIG_FILE>' WITH_RADIUS=yes WITH_TP=yes DEPLOY_K8S=no INSTALL_KUBECTL=no INSTALL_HELM=no ONOS_TAG=voltha-2.1 ./voltha up

Note: replace PATH_TO_YOUR_K8S_CONFIG_FILE with your Kubernetes configuration file. To create one please check this example. For more information on various environment variables with ./voltha up please check the link here

Functional Testcases

All functional test cases are placed under functional folder.

Voltha_PODTests.robot consists of functional testcases that can be run on a physical POD.

Each robot testcase has a description in the Documentation section.

The same suite of tests can be run on any POD because parameters needed for the test are written in .yaml file. Instead of hardcoding the POD specific variables in the test case, tests rely on a separate configuration file which describes the POD setup. This .yaml file contains details like the ONUs, OLT, nodes etc.

To create a configuration file for your POD, check this example

Input data are stored in the data folder. Few examples of input data could be, test specific SADIS configurations, tech profiles etc. Please give appropriate file names to the input files.

To trigger tests on the physical POD

git clone https://github.com/opencord/voltha-system-tests
git clone https://github.com/opencord/cord-tester
git clone https://github.com/opencord/voltha
cd voltha-system-tests/tests/functional
robot -V <PATH_TO_YOUR_POD_CONFIGURATION_FILE> Voltha_PODTests.robot

Note: PATH_TO_YOUR_POD_CONFIGURATION_FILE should point to the YAML file that describes your POD setup.

Scenarios in each test suite can be associated with a Tag, using which a particular scenario can be invoked during test execution. As an example to execute only one testcase from the test suite you can do something like here:

cd voltha-system-tests/tests/functional
robot -i test1 -V <PATH_TO_YOUR_POD_CONFIGURATION_FILE> Voltha_PODTests.robot

Adding to the tests

Most additions should be done by adding keywords to the libraries, then calling these keywords from the tests. Consult a guide on how to write good Robot framework tests.

When writing new functions, make sure there is proper documentation for it. Also, follow a good naming convention for any new functions. There are also many keywords/functions available as part of the SEBA test framework which can be found here

Tests should be written in RobotFramework as they need to be integrated with Jenkins test jobs. Libraries can be written in python or RobotFramework.

Make sure that make lint check passes, which runs robotframework-lint on any new code that is created. The goal of the linter is to ensure that code is well formatted and structured, and that test suites are of a reasonable size. Lint can fail for a variety of reasons, usually related to formatting.

If you have trouble with the line length check, try the following:

If you get a Line Length related problem, you can continue lines between keywords with the ... operator - see the robot documentation for more information.
If it's an issue with a long shell invocation that uses a pipeline to filter output, try to see if you could use built-in Robot functionality for string or JSON manipulation, rather than using shell tools like sed, awk, or jq.
If you absolutely must use a long shell command, it can be stored in a string that is split over multiple lines with the Catenate Keyword before it's run.