# testing.RecordedCall.stdin

- **Module:** testing
- **Package:** libtmux
- **Language:** TypeScript
- **Kind:** property
- **Source:** https://github.com/libtmux/libtmux-ts/blob/073b9d7dedad900bff6f5ec0ea47794e40225870/packages/libtmux/src/testing.ts#L62
- **Page:** https://libtmux.org/en/ts/latest/reference/testing-recordedcall-stdin/

Bytes written to the command's standard input, when it had any.

Part of the key, not just the record: [`load-buffer -`](/en/tmux/latest/manual/load-buffer/) is the same command
whatever it is fed, so a recording keyed on the commands alone would
answer a test that wrote different bytes with the ones it first saw, and
a regression that corrupted a buffer would replay as a pass.