shellspec ☆

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Description:
BDD unit testing framework for dash, bash, ksh, zsh and all POSIX shells

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | @shellspec | formulae.brew.sh

Category: Developer tools

Tags: testing shell bash devops bdd posix

Install: brew install shellspec

About:
Shellspec is a comprehensive BDD (Behavior-Driven Development) testing framework designed for shell scripts. It allows developers to write tests in a readable, specification-like format to validate script behavior across various POSIX-compliant shells. The tool provides robust testing capabilities including mocking, parameterized tests, and detailed reporting, ensuring script reliability and maintainability.

Key Features:

Cross-shell compatibility (bash, zsh, ksh, dash, POSIX)
Readable BDD syntax with describe/it blocks
Built-in mocking and stubbing capabilities
Detailed test reports and code coverage
Zero-dependency, self-contained executable

Use Cases:

Unit testing shell scripts and automation pipelines
Validating POSIX shell script compatibility
Testing system administration and DevOps scripts
CI/CD integration for shell-based projects

Alternatives:

bats-core – Bats is simpler but lacks built-in BDD syntax and advanced features like mocking
shunit2 – Older framework with xUnit style, less modern features and shell compatibility

Version History

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