FilesystemIterator with vfsStream

Question

I am using (learning) vfsStream to test file system operations on a directory tree with 23,000 items in it.

Here's what I am trying to do in a PHPUnit test:

    public function testMockFS() {
        $buffer = (array) json_decode(file_get_contents(__DIR__ . '/resources/structure.json'));
        $root = vfsStream::setup('/',null,$buffer);

        $it = new FilesystemIterator($root);
        foreach ($it as $fileInfo) {
            echo $fileInfo->getFilename() . "\n";
    }

}

Note: I know this doesn't test anything. Right now, I am just trying to get the iteration working, and so I want to print the directory structure to the screen before I start writing tests.

structure.json is a dump from production that contains a complete reproduction of the filesystem (without the filecontent, which is irrelevant for what we're working on).

vfsStream::setup() appears to work fine. No errors.

How do I iterate the vfsSystem using FilesystemIterator? I feel like either 1) $root should return a directory from the vfs that FilesystemIterator can work with, or b) I should be passing "vfs::/" as the argument, but FilesystemIterator doesn't know what "vfs::" things are.

I'm sure I'm making this harder than it has to be. Thanks in advance.

score 2 · Accepted Answer · answered Jul 28 '17 at 14:50

2

I figured it out. You have to use vfsStream::url('/path/to/directory/you/want');

public function testMockFS() {
    $buffer = (array) json_decode(file_get_contents(__DIR__ . '/resources/structure.json'));
    $root = vfsStream::setup('/',null,$buffer);

    $it = new FilesystemIterator(vfsStream::url('/'));
    foreach ($it as $fileInfo) {
        echo $fileInfo->getFilename() . "\n";
}

}

answered Jul 28 '17 at 14:50

DrDamnit

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Depending on your development setup you can benefit from xdebug as a step debugger when writing your tests. Setting a breakpoint here and there allows you to inspect actual variables while you write your tests, especially when you use (new) test-helpers like vfs-stream. Just saying, it helps me a lot here and there. Also var_dump() is often superior to echo. – hakre Jul 28 '17 at 22:35

FilesystemIterator with vfsStream

1 Answers1