Apex Developer Guide

Apex Developer Guide
Getting Started with Apex
Writing Apex
Running Apex
Debugging, Testing, and Deploying Apex
Debugging Apex
Testing Apex
Understanding Testing in Apex
What to Test in Apex
What are Apex Unit Tests?
Understanding Test Data
Run Unit Test Methods
Testing Best Practices
Testing Example
Testing and Code Coverage
Code Coverage Best Practices
Build a Mocking Framework with the Stub API
Deploying Apex
Distributing Apex Using Managed Packages
Apex Language Reference
Appendices
Glossary
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Testing Apex

Apex provides a testing framework that allows you to write unit tests, run your tests, check test results, and have code coverage results.

Let's talk about unit tests, data visibility for tests, and the tools that are available on the Lightning platform for testing Apex. We'll also describe testing best practices and a testing example.