# Testing 100k-Line Nested JSON Trees for Missing Scenarios

DevFeed: [Testing 100k-Line Nested JSON Trees for Missing Scenarios](<https://devfeed.tech/articles/how-we-test-100k-line-nested-json-trees-without-going-insane-40855.md>)

Original publisher: [Read original article](<https://mutto.fyi/posts/2025/08/test-mind-maps/>)

Published: 2025-08-11T00:00:00Z

Content type: article

Language: en

Sources: [Mutt0-ds Notes](<https://devfeed.tech/sources/mutt0-ds-notes.md>)

Topics: [JSON](<https://devfeed.tech/topics/json.md>), [test](<https://devfeed.tech/topics/test.md>)

Tags: [bugs](<https://devfeed.tech/tags/bugs.md>), [compliance](<https://devfeed.tech/tags/compliance.md>), [json](<https://devfeed.tech/tags/json.md>), [test](<https://devfeed.tech/tags/test.md>), [trees](<https://devfeed.tech/tags/trees.md>)

## AI overview

The article describes the challenge of reliably testing massive, deeply nested JSON logic files used by StoryTeller, a tool for generating personalized financial reports. Missing scenarios can cause reports to crash, and the article explains how the system's size and intertwined conditions make omissions difficult to detect.

## Source excerpt

Today I want to share an interesting challenge that's been bugging me since I joined InvestSuite last December. It's stories like this that...