Apex Developer Guide

Apex Developer Guide
Release Notes
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
Apex Integration Tests for Agentforce and Data 360 Services (Developer Preview)
Deploying Apex
Apex in Managed Packages
Apex Reference
Appendices
PDF

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.

To protect the privacy of your data, make sure that test error messages and exception details don’t contain any personal data. The Apex exception handler and testing framework can’t determine if sensitive data is contained in user-defined messages and details. To include personal data in custom Apex exceptions, we recommend that you create an Exception subclass with new properties that hold the personal data. Then, don’t include subclass property information in the exception's message string.

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