/**
 * Creates a per-test-file temp-dir helper.
 *
 * Returns a `tmp(prefix)` function that creates a uniquely-named directory
 * under `os.tmpdir()` and tracks it. An `afterAll` hook is registered on
 * the calling test file's scope; when the file finishes running, every
 * tracked directory is removed (recursively, force).
 */
export declare function createTmpHelper(): (prefix: string) => string;
export declare function expectModuleToMatchSnapshot(testName: string, testCategory: string, fixtureNames: string[]): void;
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