public function testUnique()
{
$obj1 = new \stdClass();
$obj1->id = 1;
$obj1->data = 'a';
$obj2 = new \stdClass();
$obj2->id = 1;
$obj2->data = 'b';
$obj3 = new \stdClass();
$obj3->id = 2;
$obj3->data = 'c';
$obj4 = new \stdClass();
$obj4->id = '2';
$obj4->data = 'd';
$collection = new Collection([$obj1, $obj2, $obj3, $obj4]);
$result = $collection->distinct(function ($obj) {
return $obj->id;
});
$this->assertSame([0 => $obj1, 2 => $obj3, 3 => $obj4], $result->toArray(), 'uniqueness is based on strict callback value');
$result = $collection->distinct();
$this->assertSame([$obj1, $obj2, $obj3, $obj4], $result->toArray(), 'default flag is sort regular');
$this->setExpectedException(\InvalidArgumentException::class);
$collection->distinct('not valid argument');
}
