Simulink test multiple sequences for harness

Does a test harness in simulink test have a one to one relationship to a test sequence? Or can I add multiple test sequences to a harness?

If not I don't see the point of a test sequence harness.

Answer 1

[Paul Urban]

Yes it is possible to put multiple test sequences inot a test harness. You can use variants to control which Test Sequence is active during a specific test.

[Michael Sarcevic]

Oh thank you, thats great news! Is there a documentation for this functionality? In all tutorials and all documentations I found there are always only one test sequence.

[Paul Urban]

Unfortunately there isn't an example of test sequences with variants but there is doc on using Variants that could be applied to a Test Sequence. https://www.mathworks.com/help/simulink/slref/variant-subsystems.html

It also is possible to have more than one test sequence within a single test sequence block in a test harness byt using the when-decomposition pattern. In the Test Sequence editor:

• create a parameter, e.g., ScenarioId,

• create one top-level step and use the context menu to enable when-decomposition,

• create two or more child steps underneath with the following content:

• Scenario1 when ScenarioId == 1

% MATLAB code for scenario 1

• Scenario2 when ScenarioId == 2

% MATLAB code for scenario 2

• …

• UnknownScenario

assert(false, 'unknown scenario %d', ScenarioId)

• in the base or model workspace, create a variable named ScenarioId with the scenario number that you’d like to run.

See https://www.mathworks.com/help/sltest/ug/introduction-to-test-sequences.htmlfor more details about when-decomposition.