unlink: vi.fn(async (p: string) => {

state.files.delete(p);

}),

readFile: vi.fn(async (p: string) => {

const key = p;

const value = state.files.get(key);

if (value !== undefined) {

return value;

}

throw new Error(`ENOENT: no such file or directory, open '${key}'`);

}),

writeFile: vi.fn(async (p: string, data: string, opts?: { mode?: number }) => {

const key = p;

state.files.set(key, data);