IsoCodes\Tests\IsbnTest::testInvalidValues PHP Method

testInvalidIsbn

public testInvalidValues ( mixed $isbn, integer \| null $type = null )
$isbn	mixed
$type	integer \| null

    public function testInvalidValues($isbn, $type = null)
    {
        $this->assertFalse(Isbn::validate($isbn, $type));
    }

IsbnTest