public function testTruncate()
{
$s = new Stream();
$s->open(STREAM_MODE_READWRITE);
$s->write('This is a beautiful example stream.');
// Truncating to a longer stream does not work...
$this->assertFalse($s->truncate(1000));
// ... only truncating to smaller size
$this->assertTrue($s->truncate(10));
$this->assertEquals($s->size(), 10);
$this->assertEquals($s->tell(), 10);
$this->assertEquals($s->buffer, 'This is a ');
}