[E] More testcases

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 61.53846% with 5 lines in your changes missing coverage. Please review.

Project coverage is 47.98%. Comparing base (069edfe) to head (33510ff). Report is 1 commits behind head on master.

Files	Patch %	Lines
internal/transcribe/transcribe.go	61.54%	4 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #15 +/- ## ========================================== + Coverage 42.17% 47.98% +5.81% ========================================== Files 10 10 Lines 536 542 +6 ========================================== + Hits 226 260 +34 + Misses 289 260 -29 - Partials 21 22 +1 ```

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