What's wrong with this Objective-C?

Hi, I am trying to iterate through all the files in /Documents/Test/.  I know there is one file there, but the following loop is not being entered by program execution:

for (NSURL *url in enumerator) {



void ProcessFolder(void)
{
    NSFileManager *fileManager = [[NSFileManager alloc] init];
    NSURL *directoryURL = [[NSURL alloc]initFileURLWithPath:@"/Documents/Test" isDirectory:YES];
    NSArray *keys = [NSArray arrayWithObject:NSURLIsDirectoryKey];
   
    NSDirectoryEnumerator *enumerator = [fileManager
                                         enumeratorAtURL:directoryURL
                                         includingPropertiesForKeys:keys
                                         options:0
                                         errorHandler:^(NSURL *url, NSError *error) {
                                             // Handle the error.
                                             // Return YES if the enumeration should continue after the error.
                                             return YES;
                                         }];
   
    for (NSURL *url in enumerator) {
        NSError *error;
        NSNumber *isDirectory = nil;
        if (! [url getResourceValue:&isDirectory forKey:NSURLIsDirectoryKey error:&error]) {
            // handle error
        }
        else if (! [isDirectory boolValue]) {
            // No error and it’s not a directory; do something with the file
        }
    }
}