---
title: "Discussion on \"Dagger SPI - Adding Custom Graph Validation (with KSP and tests!)\" | Hashnode"
description: "Discussion on \"Dagger SPI - Adding Custom Graph Validation (with KSP and tests!)\". Learn how to write custom Dagger SPI plugins with unit tests"
url: "https://hashnode.com/posts/dagger-spi-adding-custom-graph-validation-with-ksp-and-tests/65e334d0a281bd91ee248a2e"
---

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# [Dagger SPI - Adding Custom Graph Validation (with KSP and tests!)](https://blog.joetr.com/dagger-spi-adding-custom-graph-validation-with-ksp-and-tests?utm_source=hashnode&utm_medium=feed)

Learn how to write custom Dagger SPI plugins with unit tests

Mar 2, 2024 · 12 min read · blog.joetr.com  
Updated Apr 29  
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-   [#dagger-spi](https://hashnode.com/tag/dagger-spi)
-   [#ksp](https://hashnode.com/tag/ksp)
-   [#dagger-hilt](https://hashnode.com/tag/dagger-hilt)
-   [#dagger](https://hashnode.com/tag/dagger)
-   [#testing](https://hashnode.com/tag/testing)
-   [#android](https://hashnode.com/tag/android)
-   [#android-app-development](https://hashnode.com/tag/android-app-development)
-   [#shiftlefttesting](https://hashnode.com/tag/shiftlefttesting)

## Written by

[Joe Roskopf](https://hashnode.com/@joetr)

@joetr · Minneapolis, MN

  
[View profile](https://hashnode.com/@joetr)

Principal Android Engineer @ Nike

Hey! I’m Joe! I’m an Android developer who is passionate about the human side of software development.

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