Suite Generation

CSIT uses robot suite files to define tests. However, not all suite files available for Jenkins jobs (or manually started bootstrap scripts) are present in CSIT git repository. They are generated only when needed.

Autogen Library

There is a code generation layer implemented as Python library called “autogen”, called by various bash scripts.

It generates the full extent of CSIT suites, using the ones in git as templates.

Sources

The generated suites (and their contents) are affected by multiple information sources, listed below.

Git Suites

The suites present in git repository act as templates for generating suites. One of autogen design principles is that any template suite should also act as a full suite (no placeholders).

In practice, autogen always re-creates the template suite with exactly the same content, it is one of checks that autogen works correctly.

Regenerate Script

Not all suites present in CSIT git repository act as template for autogen. The distinction is on per-directory level. Directories with regenerate_testcases.py script usually consider all suites as templates (unless possibly not included by the glob patten in the script).

The script also specifies minimal frame size, indirectly, by specifying protocol (protocol “ip4” is the default, leading to 64B frame size).

Constants

Values in Constants.py are taken into consideration when generating suites. The values are mostly related to different NIC models and NIC drivers.

Python Code

Python code in resources/libraries/python/autogen contains several other information sources.

Testcase Templates

The test case part of template suite is ignored, test case lines are created according to text templates in Testcase.py file.

Testcase Argument Lists

Each testcase template has different number of “arguments”, e.g. values to put into various placeholders. Different test types need different lists of the argument values, the lists are in regenerate_glob method in Regenerator.py file.

Iteration Over Values

Python code detects the test type (usually by substrings of suite file name), then iterates over different quantities based on type. For example, only ndrpdr suite templates generate other types (mrr and soak).

Hardcoded Exclusions

Some combinations of values are known not to work, so they are excluded. Examples: Density tests for too much CPUs; IMIX for ASTF.

Non-Sources

Some information sources are available in CSIT repository, but do not affect the suites generated by autogen.

Testbeds

Overall, no information visible in topology yaml files is taken into account by autogen.

Testbed Architecture

Historically, suite files are agnostic to testbed architecture, e.g. ICX or ALT.

Testbed Size

Historically, 2-node and 3-node suites have diferent names, and while most of the code is common, the differences are not always simple enough. Autogen treat 2-node and 3-node suites as independent templates.

TRex suites are intended for a 1-node circuit of otherwise 2-node or 3-node testbeds, so they support all 3 robot tags. They are also detected and treated differently by autogen, mainly because they need different testcase arguments (no CPU count). Autogen does nothing specifically related to the fact they should run only in testbeds/NICs with TG-TG line available.

Other Topology Info

Some bonding tests need two (parallel) links between DUTs. Autogen does not care, as suites are agnostic. Robot tag marks the difference, but the link presence is not explicitly checked.

Job specs

Information in job spec files depend on generated suites (not the other way). Autogen should generate more suites, as job spec is limited by time budget. More suites should be available for manually triggered verify jobs, so autogen covers that.

Bootstrap Scripts

Historically, bootstrap scripts perform some logic, perhaps adding exclusion options to Robot invocation (e.g. skipping testbed+NIC combinations for tests that need parallel links).

Once again, the logic here relies on what autogen generates, autogen does not look into bootstrap scripts.