MATLAB Programming Fundamentals - MathWorks

Test block. However, the measured time includes the time to perform the verifications.

Best practice is to measure a more accurate performance boundary.

Create a performance test in a file, fprintfTest.m, in your current working folder. This

test is similar to the regression test with the following modifications:

• The test inherits from matlab.perftest.TestCase instead of
  matlab.unittest.TestCase.


• The test calls the startMeasuring and stopMeasuring methods to create a
  boundary around the fprintf function call.

classdef fprintfTest < matlab.perftest.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);

testCase.startMeasuring();

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

testCase.stopMeasuring();

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

end

function testBytesToFile(testCase)

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

testCase.startMeasuring();

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

testCase.stopMeasuring();

33 Unit Testing