Mobile and Offline Developer Guide

Mobile App Development with Lightning Web Components and LWC Offline
Create Mobile-Ready Components
Use Mobile Device Features in Mobile Apps
Offline Considerations and Limitations
Offline Environment Details
Use Salesforce Features While Offline
Development Tools and Processes
Understand the Mobile Development Cycle
Set Up Your Development Environment
Preview Components on Mobile
Validate Lightning Web Components for Offline Use
Develop Offline-Ready LWCs with the LWC Offline Test Harness
Test Harness Overview
Test Harness Home Tab
Test Harness Debug Tab
Test Harness SObjects Tab
Test Harness Drafts Tab
Install the Test Harness App
Use the Test Harness App
Debug Lightning Web Components
Debug Mobile Components
Customize the Offline Experience for the Salesforce Mobile App
Quick Start Tutorials
PDF

Newer Version Available

This content describes an older version of this product. View Latest

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.