Programmatically uploading a file

Question

I'm using the jQuery file upload plugin which has an API to programmatically upload files. The documentation writes:

$('#fileupload').fileupload('add', {files: filesList});

The problem is that I don't know what filesList should be. I have tried the following unsuccessfully:

$('#fileupload').fileupload('add', {files: ['/Users/bob/Desktop/test.png']});

What should filesList be exactly?