/**
* @dataProvider subjectProvider
* @covers ::filter
*/
public function test_filter(testSubject $subject)
{
$empty = testNew([]);
$tResult = $subject->filter(bTrue);
$fResult = $subject->filter(bFalse);
// True
self::assertNotSame($subject, $tResult);
self::assertEquals($subject, $tResult);
// False
self::assertNotSame($subject, $fResult);
self::assertEquals($empty, $fResult);
}
