Test Harness Overview

Learn the major features and where to find them in the Test Harness app.

Test Harness is a general purpose development tool for mobile developers working on the Salesforce platform. It has a number of specific, purpose-built tools for inspecting the LWC Offline environment. It also makes it easy to run and inspect custom components under development. Some features look like they duplicate or overlap each other at a high level, but have important differences when you get into the specific behavior. Understanding which tool to use for a given purpose is essential to being successful with the tool.

There are two separate navigation controls for Test Harness.

1 — Sidebar menu (”hamburger” icon)
2 — Tabs bar

Primary navigation controls in the Test Harness app

The sidebar menu provides access to a few duplicate or secondary features of Test Harness. Documentation for secondary features is forthcoming.

The tabs bar along the bottom of the app’s user interface provides access to the primary features of Test Harness.

Test Harness Home Tab

The Home tab of the Test Harness app is your home base for using the tool in your daily development activities. This screen is where you start from after you log into Salesforce with the app. It provides direct access to the most essential tools in Test Harness.
Test Harness Debug Tab

The Debug tab of the Test Harness app is a developer-centric tool for inspecting network logs, navigating to page references, and switching applications.
Test Harness SObjects Tab

The SObjects tab of the Test Harness app is a developer-centric tool for examining Salesforce records, and the actions available on them.
Test Harness Drafts Tab

The Drafts tab of the Test Harness app is a developer-centric tool for controlling and examining the contents of the Offline Queue, including drafts you’ve created while offline.