From Newsgroup: comp.lang.ada

bbt (https://github.com/LionelDraghi/bbt) is the most effective
solution for documenting and testing CLI software: describe your
scenarios in near-natural language in the format of your Markdown documentation, and then just run this doc.

Version 0.4 focuses on what happens when things go wrong:

- the commands' standard error is now captured apart from the standard
output, and can be checked with "Then the error output is |
contains | does not contain ...";
- the exact exit code can be checked with "Then the exit code is `1`";
- environment variables are now under the scenario's control
"Given the environment variable `LANG` is `C`" (or "... is not
set");
- when a check fails, expected and actual outputs are now displayed in
a much more comfortable side by side format, sdiff inspired, with a
few lines of context.

Special Kudos to Heziode, who largely contributed to this version's
contents.

FOR AI CODING AGENTS

bbt now ships an agent skill (https://agentskills.io) that teaches AI
coding agents (Claude Code, Cursor, Copilot, ...) to write, convert,
run and debug bbt scenarios. Installing it is very simple: see the
"For AI coding agents" section on the bbt site (https://github.com/LionelDraghi/bbt#for-ai-coding-agents) for the instructions.

Then just ask your LLM to make the examples in your README verifiable,
or to turn your spec into executable tests, and that's it!

bbt (https://github.com/LionelDraghi/bbt) is available for
Linux/Mac/Windows, and has been submitted to the Alire community
index.

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