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Run pytest

General

• Please use tests/run_test.sh to execute test case(s).

Run nightly tests

• ./run_tests.sh -d -n [-s ] -t t1,any
  • -d: specify the dut host name
  • -n: specify the testbed name
  • -t: specify the testbed topology type, in this example, ‘t1’ test cases and ‘any’ will be executed.

Run a group of tests

• ./run_tests.sh -d -n [-s ] -t t1 -u
  • -u: bypass the utility test cases.
  • executed t1 test cases.

Run a single test case

• ./run_tests.sh -d -n [-s ] -u -c platform_tests/test_link_flap.py
  • execute link flap test case.
  • when specifying test cast list, no need to specify topology with -t.

Run scripts under a folder

• ./run_tests.sh -d -n -u -c "snmp/test_*.py" -s "snmp/test_snmp_cpu.py"
  • execute all the scripts under snmp, skip script snmp/test_snmp_cpu.py.
  • the test scripts pattern MUST be double quoted, otherwise there would be problem of running correct scripts.

Run a list of test cases

• ./run_tests.sh -d -n [-s ] -u -c "platform_tests/test_link_flap.py platform_tests/test_reboot.py::test_cold_reboot"
  • execute link flap test and cold reboot test case.
  • when specifying test cast list, no need to specify topology with -t.

Run tests by pytest

Optionally, we can directly use the pytest command to run tests. The best practice of using pytest to run scripts is to follow below syntax:

pytest [test script files or directories containing test script files] [options listed in "pytest --help" only] [options extended in sonic-mgmt]

For example:

pytest test_announce_routes.py --inventory veos_vtb --host-pattern vlab-01 --testbed_file vtestbed.csv --log-cli-level info

Please ensure that the command line options extended in sonic-mgmt are always added AFTER the test script files or directories containing test script files. Otherwise, pytest may complain that the options defined in conftest.py of sub-folders are unrecognized.

The reason is that pytest will do a pre-parse for all of the supplied command line arguments. During pre-parse, all the options extended in sonic-mgmt are unknown to the argparser yet. In this phase, pytest will try to figure out which of the supplied arguments are test scripts.

For example, if the pytest command line is like this:

pytest --inventory veos_vtb --host-pattern vlab-01 --testbed vms-kvm-t0 --testbed_file vtestbed.csv --log-cli-level debug --disable_loganalyzer --skip_sanity example/test_example.py --example_option1 my_value1

Arguments that are known to pytest during pre-parse phase:

• --inventory veos_vtb
• --host-pattern vlab-01
• --log-cli-level debug

Rest of the arguments are unknown to pytest yet.

Since --testbed has double - in the front of it. Argparser knows that it must be an option. However, the value vms-kvm-t0 after it is considered as a test script name by argparser.

After pre-parse is done, pytest will try to locate all the conftest.py files related the discovered test scripts, which is vms-kvm-t0 in this example. File sonic-mgmt/tests/conftest.py will be loaded by pytest because it is in the same directory of vms-kvm-t0. However, file sonic-mgmt/tests/example/conftest.py is not loaded as expected. Then pytest will parse all the command line arguments and complain that --example_option1 is unrecognized argument.

If we run the command like below, then there is no problem.

pytest --inventory veos_vtb --host-pattern vlab-01 example/test_example.py --testbed vms-kvm-t0 --testbed_file vtestbed.csv --log-cli-level debug --disable_loganalyzer --skip_sanity --example_option1 my_value1

During pre-parse, pytest recognizes that example/test_example.py is a test script. Then pytest will try to load file sonic-mgmt/tests/try_opt/conftest.py. After this conftest.py file is loaded, there is no problem of parsing argument --example_option1.

reference:

https://github.com/Azure/sonic-mgmt/edit/master/docs/tests/pytest.run.md