public function testFilter()
{
$stream = new S\Stream($this->array);
$predicate = function ($item) {
return !($item % 2);
};
$result = $stream->filter($predicate);
$this->assertEquals(array(2, 4), $result->getElements());
$stream = new S\Stream($this->array);
$predicateEven = function ($item) {
return !($item % 2);
};
$predicateEqualsFour = function ($item) {
return $item == 4;
};
$secondResult = $stream->filter($predicateEven)->filter($predicateEqualsFour);
$this->assertEquals(array(4), $secondResult->getElements());
}
