How to set expected exception in PHPUnit for incorrect file path in fopen()?

Question

I know how to set an expected exception while unit testing using PHPUnit's setExpectedException() method and/or its equivalent annotation.

But for some reason I'm not able to do the same while testing some logic around a fopen() here is an example:

class AbstractFileReaderTest extends \PHPUnit_Framework_TestCase
{
    public function test_invalidFileException()
    {
        $filePath = 'incorrect/file/path.csv';

        $this->setExpectedException(\Exception::class);

        fopen($filePath, "r");
    }
}

fopen() doesn't throw an exception, it generates a warning (and returns a Boolean false).... unless you've overridden the PHP error handler to throw an exception instead of that normal behaviour — Mark Baker
– Mark Baker, Commented Jun 29, 2015 at 15:35
besides @MarkBaker's comment - setExpectedException's first argument should be a string. — Dekel
– Dekel, Commented Jun 29, 2015 at 15:38

Zdenek Machek · Accepted Answer · 2015-06-29 22:27:29Z

2

For unit test on file system it's better to use something like vfsStream

vfsStream is a stream wrapper for a virtual file system and for tests it's cleaner solution to write there then real file system.

answered Jun 29, 2015 at 22:27

Zdenek Machek

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1 Comment

user5060359 Over a year ago

Very interesting and useful tool, thanks. But is that alright to have posix installed?

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