MATLAB Programming Fundamentals - MathWorks

This method uses the level property and, therefore, results in three test elements—one

for each value in level. The testClass method tests the class of the output from the

sierpinski function with each combination of the type and level properties. This

approach results in nine test elements. The testDefaultL1Output test method does

not use a TestParameter property and, therefore, is not parameterized. This test

method verifies that the level 1 matrix contains the expected values. Since the test

method is not parameterized, it results in a one test element.

In the test methods above, you did not define the ParameterCombination attribute of

the Test methods block. This attribute is, by default, 'exhaustive'. The test

framework invokes a given test method once for every combination of the test

parameters.

Define Test methods Block with ParameterCombination Attribute

Define the following test methods in the TestCarpet class to ensure that the matrix

output by the sierpinski function has the correct number of elements. Set the

ParameterCombination attribute to 'sequential'.

methods (Test, ParameterCombination='sequential')

function testNumel(testCase, level, side)

import matlab.unittest.constraints.HasElementCount

testCase.verifyThat(sierpinski(level),...

HasElementCount(side^2))

end

end

end

Test methods with the ParameterCombination attribute set to 'sequential' are

invoked once for each corresponding value of the parameter. The properties, level and

side, must have the same number of values. Since these properties each have three

values, the testNumel method is invoked three times.

TestCarpet Class Definition Summary

The complete contents of TestCarpet.m follows.

classdef TestCarpet < matlab.unittest.TestCase

properties (TestParameter)

type = {'single','double','uint16'};

level = struct('small', 2,'medium', 4, 'large', 6);

side = struct('small', 9, 'medium', 81,'large', 729);

33 Unit Testing