MATLAB Programming Fundamentals - MathWorks

Test Performance Using Classes

This example shows how to create a performance test and regression test for the

fprintf function.

Write Performance Test

Consider the following unit (regression) test. You can run this test as a performance test

using runperf('fprintfTest') instead of runtests('fprintfTest').

classdef fprintfTest < matlab.unittest.TestCase

properties

file

fid

end

methods(TestMethodSetup)

function openFile(testCase)

testCase.file = tempname;

testCase.fid = fopen(testCase.file,'w');

testCase.assertNotEqual(testCase.fid,-1,'IO Problem')

testCase.addTeardown(@delete,testCase.file);

testCase.addTeardown(@fclose,testCase.fid);

end

end

methods(Test)

function testPrintingToFile(testCase)

textToWrite = repmat('abcdef',1,5000000);

fprintf(testCase.fid,'%s',textToWrite);

testCase.verifyEqual(fileread(testCase.file),textToWrite)

end

function testBytesToFile(testCase)

textToWrite = repmat('tests_',1,5000000);

nbytes = fprintf(testCase.fid,'%s',textToWrite);

testCase.verifyEqual(nbytes,length(textToWrite))

end

end

end

The measured time does not include the time to open and close the file or the assertion

because these activities take place inside a TestMethodSetup block, and not inside a

Test Performance Using Classes