Create Test Harnesses from Standalone Models
Standalone test models are often used to verify your main model. You can create Simulink® Test™ test harnesses by importing your standalone test models. Importing standalone models enables synchronization and management features, allowing you to:
Iterate on your design, using model and test harness synchronization
Manage test harnesses, using the UI and programmatic interface
Clarify ownership of a test harness by a model, subsystem, or library being tested
A common test model passes input signals to a copy of a subsystem or a Model block referencing your main model. Test models include models created by Simulink Coverage™ and Simulink Design Verifier™.
Test Harness Import Workflow
Before importing a standalone model as a test harness, determine:
In the main model, the model or component to associate the test harness with.
The path to the standalone model.
The tested component in the standalone model.
For example, this standalone model tests the
Controllersubsystem. The model passesInputstoController.Safety Propertiesverifies theControlleroutput.
Component Compatibility for Test Harness Import
When you import a model as a test harness, the component in the main model must be compatible with the component in the standalone model.
In the main model, if the component is: | In the standalone model, the tested component must be: |
|---|---|
A user-defined function block (e.g. an S-Function block) | The same block type |
The top-level model | A Model block or a subsystem |
A subsystem | A subsystem, Model block, or a user-defined function block |
A Subsystem Reference block | Subsystem model |
A Model block | A Model block or a subsystem |
You cannot create a test harness by importing:
Libraries
Models that have existing test harnesses
Models with unsaved changes. Save open models before importing
Import a Standalone Model as a Test Harness
This example shows how to import a standalone test model to create a test harness in Simulink Test.
The main model sltestBasicCruiseControl is a cruise control system, with root import and output blocks.
The test model contains a Signal Builder block driving a copy of the Controller subsystem, with a subsystem verifying that the throttle output goes to 0 if the brake is applied for three consecutive time steps.
Create a Test Harness from the Standalone Model
1. In the main model, right-click the Controller subsystem and select Test Harness > Import for 'Controller'.
2. Set the following harness properties:
Name:
VerificationSubsystemHarnessSimulink model to import: Click Browse and select
sltestBasicCruiseControlHarnessModelin the MATLAB®examples/simulinktestdirectory.Component under Test in imported model:
Controller
3. Click OK.
A test harness is created from the standalone model, owned by the Controller subsystem in the main model. Click the badge to preview the test harness.
