const fileName = createWikiPageFilename(stem);

expect(fileName.endsWith(".md")).toBe(true);

expect(Buffer.byteLength(fileName)).toBeLessThanOrEqual(255);

expect(Buffer.byteLength(`.${fileName}.fallback.tmp`)).toBeLessThanOrEqual(255);

expect(createWikiPageFilename(stem)).toBe(fileName);

});

});

);

const MAX_WIKI_SEGMENT_BYTES = 240;

const MAX_WIKI_FILENAME_COMPONENT_BYTES = 255;

const MAX_WIKI_SAFE_WRITE_FILENAME_COMPONENT_BYTES =

MAX_WIKI_FILENAME_COMPONENT_BYTES - Buffer.byteLength(".fallback.tmp") - 1;

const WIKI_SEGMENT_HASH_BYTES = 12;

function truncateUtf8CodePointSafe(value: string, maxBytes: number): string {

const normalizedExtension = extension.startsWith(".") ? extension : `.${extension}`;

const maxStemBytes = Math.max(

1,

MAX_WIKI_FILENAME_COMPONENT_BYTES - Buffer.byteLength(normalizedExtension),

MAX_WIKI_SAFE_WRITE_FILENAME_COMPONENT_BYTES - Buffer.byteLength(normalizedExtension),

);

return `${capWikiValueWithHash(stem, maxStemBytes, "page")}${normalizedExtension}`;

}