message: techdocs: cleanup mock fs before mounting
diff: @@ -334,6 +334,7 @@ describe('helpers', () => {
  describe('addBuildTimestampMetadata', () => {
  beforeEach(() => {
  + mockFs.restore();
  mockFs({
  [tmpDir]: {
  'invalid_techdocs_metadata.json': 'dsds',
  