CLI Testlab - Test Framework for Node.js CLIs

cli-testlab is a specialized test framework designed for Node.js command-line interface (CLI) applications. Currently at stable version 6.0.1, it provides a streamlined API for executing shell commands, capturing their standard output and error streams, and asserting on their content. Key features include the `execCommand` function, which integrates robust assertion capabilities for positive, negative, and error-based output checks, supporting both string and array inputs for comprehensive validation. It also facilitates the management of environment variables per command execution and offers a `FileTestHelper` class for automatic cleanup of test-generated files. This library differentiates itself by focusing specifically on the unique challenges of CLI testing, offering built-in utilities that abstract away common complexities like child process management and output parsing, making it simpler to write reliable and maintainable tests for CLI tools without relying on heavy general-purpose test runners for these specific tasks.