var fd = use('fd')
var time = use('time')
var blob = use('blob')

return {
    test_chunkread: function() {
        // Create temp file
        var tmp = "chunk_test.tmp"
        var f = fd.open(tmp, 'w')
        var bigdata = ""
        for(var i=0; i<100; i++) bigdata += "HelloWorld" // 1000 bytes
        fd.write(f, bigdata)
        fd.close(f)
        
        var data = new blob
        var st = time.number()
        var f2 = fd.open(tmp, 'r')
        var chunksize = 1024 // reduced for test
        
        while(true) {
            var chunk = fd.read(f2, chunksize);
            data.write_blob(chunk);
            // chunk.length is in bits, chunksize is bytes? 
            // fd.read usually takes bytes. Blob.length is bits.
            // If chunk is blob, length is bits.
            // fd.read returns blob.
            if (chunk.length < chunksize * 8) break; 
        }
        fd.close(f2)
        log.console(`read took ${time.number()-st}`)
        
        fd.unlink(tmp)
    }
}