Mock console.error and console.log in test setup to prevent
noisy stderr output from error handling tests. The error
messages were expected behavior being tested, not actual failures.
- Add assertion for original property in variable detection test
- Clarify test descriptions for HTML-like patterns and programming keywords
- Add edge cases for consecutive special characters in variable names
- Add username validation assertion in register test
- Improve useSearchParams mock to return ReadonlyURLSearchParams
- Improve cookies mock with proper return values
- Remove unused originalNavigator variable
Co-authored-by: f <196477+f@users.noreply.github.com>