PHPunit | assertDirectoryNotExists() Function

The assertDirectoryNotExists() function is a builtin function in PHPUnit and is used to assert an directory path not to exists. This assertion will return true in the case if given directory path doesn't exists else return false. In case of true the asserted test case got passed else test case got failed. Syntax:

assertDirectoryNotExists( integer $directory, string $message = '' )

Parameters: This function accepts two parameters as shown in the above syntax. The parameters are described below:

• $directory: This parameter is a string which denotes the directory path.
• $message: This parameter takes string value. When the testcase got failed this string message got displayed as error message.

Below programs illustrate the assertDirectoryNotExists() function in PHPUnit: Program 1: php

<?php
use PHPUnit\Framework\TestCase;

class GeeksPhpunitTestCase extends TestCase
{
    public function testNegativeTestcaseForAssertDirectoryNotExists()
    {
        $directoryPath = "/home/shivam/Documents/geeks";

        // Assert function to test whether given
        // directory path exists or not
        $this->assertDirectoryNotExists(
            $directoryPath,
            "directoryPath exists"
        );
    }
}

?>

Output:

PHPUnit 8.2.5 by Sebastian Bergmann and contributors.

F                                                                   1 / 1 (100%)

Time: 67 ms, Memory: 10.00 MB

There was 1 failure:

1) GeeksPhpunitTestCase::testNegativeTestcaseForAssertDirectoryNotExists
directoryPath exists
Failed asserting that directory "/home/shivam/Documents/geeks" does not exist.

/home/shivam/Documents/geeks/phpunit/abc.php:13

FAILURES!
Tests: 1, Assertions: 1, Failures: 1.

Program 2: php

<?php
use PHPUnit\Framework\TestCase;

class GeeksPhpunitTestCase extends TestCase
{
    public function testPositiveTestcaseForAssertDirectoryNotExists()
    {
        $directoryPath = "/home/shivam/Documents/geeksDoesNotExist/";

        // Assert function to test whether given
        // directory path exists or not
        $this->assertDirectoryNotExists(
            $directoryPath,
            "directoryPath exists"
        );
    }
}

?>

Output:

PHPUnit 8.2.5 by Sebastian Bergmann and contributors.

.                                                                   1 / 1 (100%)

Time: 67 ms, Memory: 10.00 MB

OK (1 test, 1 assertion)

Note: To run testcases with phpunit follow steps from here. Also, assertDirectoryNotExists() is supported by phpunit 7 and above.