MATLAB Programming Fundamentals - MathWorks

Write Tests Using Shared Fixtures

This example shows how to use shared fixtures when creating tests. You can share test

fixtures across test classes using the SharedTestFixtures attribute of the TestCase

class. To exemplify this attribute, create multiple test classes in a subdirectory of your

current working folder. The test methods are shown only at a high level.

The two test classes used in this example test the DocPolynom class and the

BankAccount class. You can access both classes in MATLAB, but you must add them to

the MATLAB path. A path fixture adds the directory to the current path, runs the tests,

and removes the directory from the path. Since both classes require the same addition to

the path, the tests use a shared fixture.

Create a Test for the DocPolynom Class

Create a test file for the DocPolynom class. Create the shared fixture by specifying the

SharedTestFixtures attribute for the TestCase and passing in a PathFixture.

DocPolynomTest Class Definition File

classdef (SharedTestFixtures={matlab.unittest.fixtures.PathFixture( ...

fullfile(matlabroot,'help','techdoc','matlab_oop','examples'))}) ...

DocPolynomTest < matlab.unittest.TestCase

% Tests the DocPolynom class.

properties

msgEqn = 'Equation under test: ';

end

methods (Test)

function testConstructor(testCase)

p = DocPolynom([1, 0, 1]);

testCase.verifyClass(p, ?DocPolynom)

end

function testAddition(testCase)

p1 = DocPolynom([1, 0, 1]);

p2 = DocPolynom([5, 2]);

actual = p1 + p2;

expected = DocPolynom([1, 5, 3]);

msg = [testCase.msgEqn,...

33 Unit Testing