busted

Uses nested `describe` and `it` blocks to make tests read like plain English, reducing verbosity while maintaining clarity, as shown in the example spec.

Supports method chaining like `assert.is_not.equal` and allows crafting custom assert functions for project-specific needs, enhancing flexibility.

Offers multiple outputs including terminal, JSON, and TAP-compatible formats, facilitating easy CI/CD integration and custom reporting workflows.

Includes spying on functions and verifying calls with `spy.on` and `assert.spy`, enabling functional testing without external libraries.