Escaped Mutant for Mutator "Coalesce": --- Original +++ New @@ @@ // use the topmost value between sorting key or value of orderBy field within its child posts $curAndChildSortingKeys = collect([ // value of orderBy field in the first sorted child post that isMatchQuery after previous sorting - $childPosts->filter(static fn(Collection $p) => ($p['isMatchQuery'] ?? true) === true)->first()[$this->orderByField] ?? null, + $childPosts->filter(static fn(Collection $p) => (true ?? $p['isMatchQuery']) === true)->first()[$this->orderByField] ?? null, // sorting key from the first sorted child posts // not requiring isMatchQuery since a child post without isMatchQuery // might have its own child posts with isMatchQuery

Escaped Mutant for Mutator "LessThan": --- Original +++ New @@ @@ return '0'; } $prefix = match (true) { - \is_int($cursor) && $cursor < 0 => '-', + \is_int($cursor) && $cursor <= 0 => '-', \is_string($cursor) => 'S', default => '', };

Escaped Mutant for Mutator "GreaterThanOrEqualTo": --- Original +++ New @@ @@ \is_string($cursor) => 'S', default => '', }; - $value = \is_int($cursor) ? rtrim(pack('P', $cursor), $cursor >= 0 ? "\x00" : "\xff") : ($prefix === 'S' ? $cursor : throw new \RuntimeException('Invalid cursor value')); + $value = \is_int($cursor) ? rtrim(pack('P', $cursor), $cursor > 0 ? "\x00" : "\xff") : ($prefix === 'S' ? $cursor : throw new \RuntimeException('Invalid cursor value')); if ($prefix !== 'S') { // https://en.wikipedia.org/wiki/Base64#URL_applications $value = str_replace(['+', '/', '='], ['-', '_', ''], base64_encode($value));

Escaped Mutant for Mutator "IncrementInteger": --- Original +++ New @@ @@ * @var string $cursor * @var string $prefix */ - [$prefix, $cursor] = array_pad(explode(':', $encodedCursor), 2, null); + [$prefix, $cursor] = array_pad(explode(':', $encodedCursor), 3, null); if ($cursor === null) { // no prefix being provided means the value of cursor is a positive int $cursor = $prefix;

Escaped Mutant for Mutator "CastArray": --- Original +++ New @@ @@ // keep 0 as is 'S' => $cursor, // string literal is not base64 encoded - default => ((array) unpack(format: 'P', string: str_pad( + default => unpack(format: 'P', string: str_pad( // re-add removed trailing 0x00 or 0xFF base64_decode( // https://en.wikipedia.org/wiki/Base64#URL_applications @@ @@ ), length: 8, pad_string: $prefix === '-' ? "\xff" : "\x00" - )))[1], + ))[1], }; })->chunk(2)->map(static fn(Collection $i) => $i->values()))->mapWithKeys(fn(Collection $cursors, string $postType) => [$postType => $cursors->mapWithKeys(fn(int|string|null $cursor, int $index) => [$index === 0 ? Helper::POST_TYPE_TO_ID[$postType] : $orderByField => $cursor])])->reject(static fn(Collection $cursors) => $cursors->every(static fn(int|string|null $cursor) => $cursor === null))->map(static fn(Collection $cursors) => new Cursor($cursors->toArray())); } }