Write a Jest Test for Wire Service | Lightning Web Components Tests
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Lightning Web Components Tests
Write a Jest Test for Wire Service
Learning Objectives
After completing this unit, you'll be able to:
List the three primary adapters for wire services.
Explain mocking data for the wire service.
Understand reactive variables and their effect.
Testing @Wire Service
Lightning web components use a reactive wire service built on Lightning Data Service to read Salesforce data. Components use @wire in their JavaScript class to read data from one of the wire adapters in the lightning/ui*Api modules.
The wire service is reactive in part because it supports reactive variables. Reactive variables are prefixed with a $. When a reactive variable changes, the wire service provisions new data. If the data exists in the client cache, a network request may not be involved.
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