Function fileExists

packages/shared/semantic-diff.test.ts:40–42

(path)

    pathDelimiter: options.pathDelimiter ?? ":",
    platform: options.platform ?? "linux",
    fileExists(path) {
      return files.has(path);
    },
    async runCommand(command, args, runOptions) {
      calls.push({ command, args, input: runOptions?.input });
      const mock = commands[command];