MATLAB Programming Fundamentals - MathWorks

Create Advanced Custom Fixture

This example shows how to create a custom fixture that sets an environment variable.

Prior to testing, this fixture will save the current UserName variable.

Create UserNameEnvironmentVariableFixture Class Definition

In a file in your working folder, create a new class,

UserNameEnvironmentVariableFixture that inherits from the

matlab.unittest.fixtures.Fixture class. Since you want to pass the fixture a user

name, create a UserName property to pass the data between methods.

classdef UserNameEnvironmentVariableFixture < ...

matlab.unittest.fixtures.Fixture

properties (SetAccess=private)

UserName

end

Define Fixture Constructor

In the methods block of the UserNameEnvironmentVariableFixture.m file, create a

constructor method that validates the input and defines the SetupDescription. Have

the constructor accept a character vector and set the fixture’s UserName property.

methods

function fixture = UserNameEnvironmentVariableFixture(name)

validateattributes(name, {'char'}, {'row'}, '','UserName')

fixture.UserName = name;

fixture.SetupDescription = sprintf( ...

'Set the UserName environment variable to "%s".',...

fixture.UserName);

end

Implement setup Method

Subclasses of the Fixture class must implement the setup method. Use this method to

save the original UserName variable. This method also defines the

TeardownDescription and registers the teardown task of setting the UserName to the

original state after testing.

Define the setup method within the methods block of the

UserNameEnvironmentVariableFixture.m file.

function setup(fixture)

originalUserName = getenv('UserName');

fixture.assertNotEmpty(originalUserName, ...

Create Advanced Custom Fixture