Compliance testcases for tacker¶
Purpose of compliance testcases is to verify various functionality of tacker api by using NFV TST code. From tacker home directory, testcases are located at tacker/tests/compliance.
What is compliance test¶
Compliance tests are assessments used in the software development process. Also known as conformance tests, these assessments confirm whether the software meets particular standards before its production.
Whereas, the purpose of functional tests is to test each function of the software application, by providing appropriate input, verifying the output against the functional requirements.
About NFV API Conformance Test Specification (NFV-TST 010)¶
The api-tests repository hosts ETSI NFV API Conformance test specification for the APIs defined in ETSI NFV GS SOL002, SOL003, SOL005. Currently available versions for NFV API Conformance test specification are v2.4.1 (published), v2.6.1 (published), v2.7.1 (published) and v3.3.1(under development).
The Test Specification is built as a collection of Robot Framework Test Description. Robot Framework is a generic test automation framework for acceptance testing and acceptance test-driven development.
Tacker Compliance Test Composition¶
This diagram briefly describe how compliance testing works.
Overview of testing by Robot Framework and ETSI NFV-TST010 test codes:
+---------------------------------------------------------------------------+
| |
| |
| |
| +-----------------------------------------------+ |
| | Tacker repository | |
| | +----------------+ +-------------------+ | |
| | | Community robot| |Zuul configuration | | |
| | | test code | |.zuul.yaml | | |
| | | | +-------------------+ | |
| | +----------------+ | |
| | +---------------+ | |
| | +----------------+ |playbook | | |
| | |testitem.robot | |runrobot.yaml | | |
| | +----------------+ +---------------+ | |
| +-----------------------------------------------+ |
| | |
| +-------------+ download (pip) | |
| | | Robot framework | |
| | python +----------------------------+ | |
| | repository | | | |
| | | | | |
| +-------------+ | | |
| v v |
| +-----------------+ download ++---+-+ |
| | | robot test code | | |
| | ETSI repository +--------------------------->+ Zuul | |
| | api-tests | | | |
| | | +---------------------+ +---+ |
| +-----------------+ | +------+ | |
| | | |
| | execute execute | |
| v v |
| +------+-----+ +------------+--+ |
| | | | | |
| | Robot | test | Tacker | |
| | framework +------------>+ (devstack) | |
| | | | | |
| +------------+ +---------------+ |
| |
| |
+---------------------------------------------------------------------------+
Note
testitem.robot is a list of test cases selected from the test code released by ETSI NFV-TST.
playbook runrobot.yaml install robot framework, download test code from api-tests repository and execute test with the above test list.
How to create Test Cases¶
Precondition for Compliance Test¶
requirements.txt : The file requirements.txt is present in api-tests
repository. It is cloned at time of compliance test execution and lists all
the packages needed for compliance test. These packages are installed during
execution of compliance test.
Implementation of test case¶
A testcase is written by declaring a class name derived from class
BaseVNFLifecycleManagementTest(base.BaseComplSolTest).
BaseComplSolTest is class declared in
tacker/tests/compliance/sol003/base.py.
A testcase body typically looks as below:
class VNFInstancesTest(BaseVNFLifecycleManagementTest):
@classmethod
def setUpClass(cls):
cls.resource = 'VNFInstances'
super(VNFInstancesTest, cls).setUpClass()
def test_post_create_new_vnfinstance(self):
//Testcase operations
//validations or asserts
In above example test class ‘VNFInstancesTest’ is derived from BaseVNFLifecycleManagementTest. Testcases typically has sections to setup, test, validate results and finally cleanup.
Other Test Implementation¶
Tacker-client : Tackerclient object is instantiated in tacker/tests/
compliance/base.py which has apis to create/delete/list vnfd/vnf once
given the necessary parameters. Verify tackerclient/v1_0/client.py for
all the tacker related apis supported.
Input yaml files : These are input files used in testcases for operations
like create vnfd or create vnf.
The location of files is samples/tests/etc/samples/.
Asserting values in testcase : The base class BaseTackerTest inherits base. TestCase which has inbuilt assert functions which can be used in testcase. example: assertIsNotNone, assertEqual
Steps to change TST’s code version¶
In Tacker’s code, 2.6.1-fix-plu api-tests version is check-in by default.
The NFV API Conformance test specification is available in the following versions:
v2.4.1
v2.6.1
v2.7.1
v2.8.1
v3.3.1
v3.5.1
v3.6.1
To change the version execute the below steps:
Open
<tacker_route_directory>/tacker/tox.inifile in any editor.Under [testenv:dsvm-compliance-sol-api] section in commands_pre while doing checkout of api-tests mention desired TST’s code version.
git -C api-tests checkout <desired_version>Note
For desired_version please refer this url: https://forge.etsi.org/rep/nfv/api-tests/-/branches
Important guidelines to follow¶
It is important that the test case executed leaves the system in the same state it was prior to test case execution and not leave any stale data on system as this might affect other test cases.
There should not be any dependencies between testcases which assume one testcase should be executed and be passed for second testcase.
The code added should meet pep8 standards. This can be verified with the following command and ensuring the code does not return any errors.
tox -e pep8
Execution of testcase¶
Install tacker server via devstack installation, which registers tacker service and endpoint, creates “nfv_user” and “nfv” project, and registers default VIM with the created user and project.
From tacker directory, all compliance testcases can be executed using the following command:
tox -e dsvm-compliance-sol-apiOr from tacker directory, specific testcases can be executed using the following command:
tox -e dsvm-compliance-sol-api tacker.tests.compliance.xxx.yyy.<testcase>
How to proceed when the test fails¶
If test case fails check its logs.
For example for ‘GET_information_about_multiple_VNF_instances’ test logs can be checked at below location:
tacker/.tox/dsvm-compliance-sol-api/log/SOL003/VNFLifecycleManagement-API /VNFInstances/GET_information_about_multiple_VNF_instances
Compliance test may also get failed due to code problem at NFV API Conformance test repository, then analyse the NFV-TST code locally.
Committing testcase and opening a review¶
Once testcase is added in local setup, commit the testcase and open for review using below guidelines
Sample testcase¶
Check sample tests under the following directory
https://opendev.org/openstack/tacker/src/branch/master/tacker/tests/compliance/
