# Description
Add tests for `path self`.
I wasn't very familiar with the code base, especially the testing
utilities, when I first implemented `path self`. It's been on my mind to
add tests for it since then.
These sub-crates form both the foundation for Nu and a set of plugins which extend Nu with additional functionality.
Foundational libraries are split into two kinds of crates:
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Support crates - a set of crates that support the engine with additional features like JSON support, ANSI support, and more.
Plugins are likewise also split into two types:
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