# Test Lib > Apex Test Module A fluent, type-safe library for creating test data in Salesforce Apex tests using Builder and Mocker patterns. ## Table of Contents ### Docs - [Introduction](https://testlib.beyondthecloud.dev/introduction.md) - [Installation](https://testlib.beyondthecloud.dev/installation.md) ### Builder - [Build](https://testlib.beyondthecloud.dev/builder/build.md) - [Templates](https://testlib.beyondthecloud.dev/builder/templates.md) - [Randomizers](https://testlib.beyondthecloud.dev/builder/randomizers.md) ### Mocker - [Build](https://testlib.beyondthecloud.dev/mocker/build.md) - [Randomizers](https://testlib.beyondthecloud.dev/mocker/randomizers.md) ### Utilities - [IdGenerator](https://testlib.beyondthecloud.dev/utilities/id-generator.md)