Class Diagram Viewer

Open the Class Diagram Viewer. In the Class Browser pane, expand the import button and select Import Namespace. Enter matlab.unittest as the namespace and click OK. The folder for unittest appears in the Class Browser.

Expand the unittest folder and select the InteractiveTestCase class. Click the Add button in the toolstrip to add a card for the class to the Class Diagram Viewer canvas. Add the TestCase class using the same method. Because TestCase is the superclass of InteractiveTestCase, Class Diagram Viewer automatically draws an arrow from InteractiveTestCase to TestCase to show this relationship.

The striped blue borders at the top of the class cards indicate that both of these classes are handle classes. The Legend pane describes what the graphic effects and icons on the canvas represent.

You can also drag items from the Class Browser directly to the canvas. Drag the Test class to the viewer. The at the top of the card indicates that Test has a viewable superclass.

Click the to add the superclass to the diagram. The arrow pointing to TestSuite from Test indicates that TestSuite is a superclass of Test.

In addition to moving the classes in the viewer by dragging and dropping, you can customize the view using the options in the Zoom and Pan section of the toolstrip, including:

In the View section of the toolstrip, select the Mixins check box. This action does not automatically add mixin classes to the diagram, but going forward, the viewer adds them to the display when you perform any action that adds superclasses.

To add all the superclasses of Test, right-click the Test class card and select Add All Superclasses. The CustomDisplay mixin now appears as a superclass of Test, and TestSuiteExtension appears as a superclass of TestSuite. The name of CustomDisplay is italicized, indicating that it is an abstract class.

You have two options each for adding superclasses and subclasses:

In addition to displaying class hierarchies, you can also explore the class definitions themselves. Expand the Test class card by clicking the arrow next to the class name in its card. The class card expands to show the properties and methods defined by the class. Properties and methods inherited from superclasses do not appear in the subclass cards.

The icons next to the property and method names identify the access levels of the properties and methods. For example, the lock icon shows that ExternalFixtures is a private property.

Selecting a property or method on the class card also displays access and other information in the Inspector pane.

To view the source code of one or more classes, select their cards and click Go To Source in the toolstrip. The source code files open in the MATLAB Editor.

To save or share your diagram, use one of two options:

The Class Diagram Viewer can show associations between classes. When the type of a class property is explicitly defined as another class using class validation, the Class Diagram Viewer can show this association.

Save these two classes to your MATLAB path.

classdef ClassA
    properties
        Property1 ClassB
        PropertySelf ClassA
    end
end

classdef ClassB
    properties
        Property1 double
    end
end

Open the Class Diagram Viewer. In the Class Browser pane, expand the Import Class, Namespace, or Folder button and select Import Class. Enter ClassA and click OK. Repeat this step for ClassB. Both classes appear in the Class Browser.

Drag ClassA and ClassB from the Class Browser to the canvas. Expand the ClassA class card by clicking the arrow next to the class name in its card. The class card expands to show the properties and methods defined by the class.

In the View section of the toolstrip, select the Associations check box. This action adds arrows to the diagram for any identifiable associations. In this case:

The arrows can be toggled on and off using the Associations check box. The arrows also appear even if the class cards are collapsed.

The Class Diagram Viewer can only identify associations when properties are defined using class validation. When defined this way, the class of the property is shown on the class card. For more information, see Property Class Validation. Also, turning on associations only shows connections between classes that are currently in the diagram. For example, if ClassB was not in the diagram, the app would not automatically add it to show the association with Property1 of ClassA.