providePrepend example

                    'तद्भव देशज विदेशी',
                    ['तद्भव', ' देशज', ' विदेशी'],
                ],
            ]
        );
    }

    public static function providePrepend(): array
    {
        return array_merge(
            parent::providePrepend(),
            [
                [
                    'देशज तद्भव',
                    ['तद्भव', 'देशज '],
                ],
                [
                    'विदेशी देशज तद्भव',
                    ['तद्भव', 'देशज ', 'विदेशी '],
                ],
            ]
        );
    }

public function testAppendInvalidUtf8String()
    {
        $this->expectException(InvalidArgumentException::class);

        static::createFromString('Symfony')->append("\xE9");
    }

    public static function providePrepend(): array
    {
        return array_merge(
            parent::providePrepend(),
            [
                [
                    'Σσς Déjà',
                    ['Déjà', 'Σσς '],
                ],
                [
                    'İIıi Σσς Déjà',
                    ['Déjà', 'Σσς ', 'İIıi '],
                ],
            ]
        );
    }