Almost every application eventually tests a nested piece of data: an API response, a JSON config file, a serialized object, module metadata. The data is a struct that contains an array that contains structs that contain more structs, and the thing you actually care about is one value buried at the bottom.

This post has two halves. First we look at BoxLang's Data Navigator, the language feature that makes nested data pleasant to work with. Then we look at the six TestBox 7.1 expectations built on top of it. If you have never used dataNavigate(), start at the top. If you already know it, skip to The six expectations.

The BoxLang playground at try.boxlang.io just got a major upgrade. You can now choose any released version of BoxLang and toggle CFML Compat mode on or off, right from the editor toolbar. No installs, no Docker images, no servers. Open a browser, write code, hit Run.

And the best part? The whole thing is powered by BoxLang Serverless on AWS Lambda, built and deployed from a single repository. Keep reading, because if you have ever wondered what BoxLang can do in the cloud, this is your answer. ☁️

Welcome to the ColdBox 8.2 Deep Dive, a five-part series that takes each major feature of ColdBox 8.2.0 and goes well past the release notes: real code, real patterns, and the gotchas you only learn after shipping.