MATLAB Programming Fundamentals - MathWorks

The testDefaultXLim function test verifies that the x-axis limits are large enough to

display the cylinder. The lower limit needs to be less than -10, and the upper limit needs

to be greater than 10. These values come from the figure generated in the helper function

— a cylinder with a 10 unit radius centered on the origin. This test function opens the

figure created and saved in the setupOnce function, queries the axes limit, and verifies

the limits are correct. The qualification functions, verifyLessThanOrEqual and

verifyGreaterThanOrEqual, takes the test case, the actual value, the expected value,

and optional diagnostic information to display in the case of failure as inputs.

Create the testDefaultXLim function as local function to axesPropertiesTest.

% Copyright 2015 The MathWorks, Inc.

function testDefaultXLim(testCase)

xlim = testCase.TestData.Axes.XLim;

verifyLessThanOrEqual(testCase, xlim(1), -10,...

'Minimum x-limit was not small enough')

verifyGreaterThanOrEqual(testCase, xlim(2), 10,...

'Maximum x-limit was not big enough')

end

The surfaceColorTest function accesses the figure that you created and saved in the

setupOnce function. surfaceColorTest queries the face color of the cylinder and

verifies that it is red. The color red has an RGB value of [1 0 0]. The qualification

function, verifyEqual, takes as inputs the test case, the actual value, the expected

value, and optional diagnostic information to display in the case of failure. Typically when

using verifyEqual on floating point-values, you specify a tolerance for the comparison.

For more information, see matlab.unittest.constraints.

Create the surfaceColorTest function as local function to axesPropertiesTest.

% Copyright 2015 The MathWorks, Inc.

function surfaceColorTest(testCase)

h = findobj(testCase.TestData.Axes,'Type','surface');

co = h.FaceColor;

verifyEqual(testCase, co, [1 0 0],'FaceColor is incorrect')

end

33 Unit Testing