/**
* @test
*/
public function selectが条件に一致する要素数を返す()
{
$collection = new Collection([1, 2, 3]);
$result = $collection->select(function ($data) {
return $data === 2;
})->all();
$this->assertEquals(1, count($result));
}
/**
* @test
*/
public function 連想配列のキーがfooの要素だけを返す()
{
$data = ['foo' => 1, 'bar' => 2];
$expected = ['foo' => 1];
$collect = new Collection($data);
$actual = $collect->select(function ($key) {
return $key === 'foo';
}, ARRAY_FILTER_USE_KEY)->all();
$this->assertSame($expected, $actual);
}
