matlab.unittest.TestCase.createTemporaryFolder - Create temporary folder - MATLAB (original) (raw)

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Class: matlab.unittest.TestCase
Namespace: matlab.unittest

Create temporary folder

Since R2022a

Syntax

Description

folder = createTemporaryFolder([testCase](#mw%5F625f9671-aaf5-4389-8187-a4a7c3838c17)) creates a temporary folder for the test case and returns the full path to the folder as a character vector. The lifecycle of the folder is tied to the test case. Once the test case goes out of scope, the testing framework removes the folder.

example

Input Arguments

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Test case, specified as a matlab.unittest.TestCase object.

Examples

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Create tests that use a temporary folder to test writing to a file.

In a file in your current folder, create the WritingToFileTest class. Define two Test methods in the class that write to a file in a temporary folder and then verify the contents of the file. To create a new temporary folder for each test, call the createTemporaryFolder method within a TestMethodSetup methods block.

classdef WritingToFileTest < matlab.unittest.TestCase properties Folder end

methods (TestMethodSetup)
    function setup(testCase)
        testCase.Folder = testCase.createTemporaryFolder();
    end
end

methods (Test)
    function test1(testCase)
        file = fullfile(testCase.Folder,"myFile.txt");
        fid = fopen(file,"w");
        testCase.addTeardown(@fclose,fid)
        testCase.assertNotEqual(fid,-1,"IO Problem")
        txt = repmat("ab",1,1000);
        dataToWrite = join(txt);
        fprintf(fid,"%s",dataToWrite);
        testCase.verifyEqual(string(fileread(file)),dataToWrite)
    end

    function test2(testCase)
        file = fullfile(testCase.Folder,"myFile.txt");
        fid = fopen(file,"w");
        testCase.addTeardown(@fclose,fid)
        testCase.assertNotEqual(fid,-1,"IO Problem")
        txt = repmat("A B",1,1000);
        dataToWrite = join(txt);
        fprintf(fid,"%s",dataToWrite);
        testCase.verifyEqual(string(fileread(file)),dataToWrite)
    end
end

end

Run the tests. Once a test runs to completion, the testing framework automatically removes the temporary folder for that test.

runtests("WritingToFileTest")

Running WritingToFileTest .. Done WritingToFileTest

ans = 1×2 TestResult array with properties:

Name
Passed
Failed
Incomplete
Duration
Details

Totals: 2 Passed, 0 Failed, 0 Incomplete. 1.3432 seconds testing time.

Tips

• The matlab.unittest.fixtures.TemporaryFolderFixture class provides a fixture to create a temporary folder. More functionality is available when you create a temporary folder using the fixture. For example, you can specify a suffix for the temporary folder name.

Version History

Introduced in R2022a