# How It Works?

### Streamlining Testing with SeaLights: Intelligent Test Selection

{% embed url="<https://youtu.be/1VnvoHd3mL0>" %}

With a growing codebase and test suite, running all tests for every code change becomes impractical and inefficient. Most code changes impact only a specific subset of tests. SeaLights Test Optimization engine, **powered by machine learning, intelligently maps each method in your code to its corresponding tests.** This precise mapping empowers you to:

* **Run only the relevant tests:** Identify and select the **exact tests associated with code changes** in a new build, ensuring optimal coverage without unnecessary redundancy.
* **Focus on what matters:** By skipping tests unlikely to fail, you can **streamline testing cycles** and **free up resources** for other critical tasks.

The **selected subset of tests is automatically executed by different test runners,** further streamlining your testing process.

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For a deeper understanding of the mechanism and its functionalities, refer to the following steps.

{% content-ref url="how-it-works/associating-code-with-tests" %}
[associating-code-with-tests](https://docs.sealights.io/knowledgebase/test-optimization/how-it-works/associating-code-with-tests)
{% endcontent-ref %}

{% content-ref url="how-it-works/detecting-modified-code" %}
[detecting-modified-code](https://docs.sealights.io/knowledgebase/test-optimization/how-it-works/detecting-modified-code)
{% endcontent-ref %}

{% content-ref url="how-it-works/generating-test-recommendations" %}
[generating-test-recommendations](https://docs.sealights.io/knowledgebase/test-optimization/how-it-works/generating-test-recommendations)
{% endcontent-ref %}

By leveraging SeaLights Test Optimization you can **dramatically improve testing efficiency and effectiveness** while maintaining the highest quality standards, ultimately accelerating your development process and delivering software with confidence.