/**
* concat
*
* Creates a lazily concatenated stream whose elements are all the elements
* of the first stream followed by all the elements of the second stream.
*
* @param Stream $a
* @param Stream $b
* @return Stream
*/
public static function concat(S\Stream $a, S\Stream $b)
{
$items = $a->getElements() + $b->getElements();
return new S\Stream($items);
}
public function testConstructor()
{
$stream = new S\Stream($this->array);
$this->assertTrue($stream instanceof S\Stream);
$this->assertEquals($this->array, $stream->getElements());
}
