How to test for file existence in PHPUnit?

@rollin 

In PHPUnit, you can test for file existence using the assertFileExists or assertFileNotExists assertion methods.

Here is an example:

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public function testFileExists()
{
    $filePath = '/path/to/file.txt';
    
    $this->assertFileExists($filePath);
}

In this example, the assertFileExists method is used to check whether the file specified by the $filePath variable exists. If the file exists, the test will pass. If it does not exist, the test will fail.

Similarly, you can use the assertFileNotExists method to check that a file does not exist:

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public function testFileDoesNotExist()
{
    $filePath = '/path/to/non_existent_file.txt';
    
    $this->assertFileNotExists($filePath);
}

This test will pass only if the file specified by $filePath does not exist. If the file exists, the test will fail.

Make sure to provide the correct path to the file you want to test for existence.