public function testMapCollector()
{
$array = ['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5, 'f' => 6];
$stream = new Stream($array);
$stream->map(new SquareFunction());
$res = $stream->collect(new MapCollector());
$this->assertEquals(['a' => 1, 'b' => 4, 'c' => 9, 'd' => 16, 'e' => 25, 'f' => 36], $res);
}
public function testSkipMapCollector()
{
$array = ['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5, 'f' => 6];
$stream = new Stream($array);
$stream->skip(3);
$res = $stream->collect(new MapCollector());
$this->assertEquals(['d' => 4, 'e' => 5, 'f' => 6], $res);
}
public function testMapCollector()
{
$array = ['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5, 'f' => 6];
$stream = new Stream($array);
$stream->filter(function ($value) {
return intval($value) % 2 == 0;
});
$res = $stream->collect(new MapCollector());
$this->assertEquals(['b' => 2, 'd' => 4, 'f' => 6], $res);
}
