I would like to add a simple jest test to my lightning web component in order to test the functionality of the following on submit event handler.

handleSubmit(event) {
    const fields = event.detail.fields;
    fields.Some_field__c = 'Some value';

It seems to me that I should be able to test that Some_field__c has been appropriately updated. The handle submit will fire in the jest test, but I can't find any documentation on how to read the subsequently resubmitted fields.

  • Hi there, have you gotten an answer to this? Mar 18 '20 at 17:10
  • @LourdesMontero No, unfortunately not
    – Kasper
    Mar 18 '20 at 23:11

You need to mock the form submit function

//Need to submit the form and verify that the record was submitted successfully
const form = element.shadowRoot.querySelector('lightning-record-edit-form');

//Mocks the submit function for lightning-record-edit-form
form.submit = jest.fn();

//Submit EVENT gets dispatched, which triggers a handler function that will call the submit FUNCTION
form.dispatchEvent(new CustomEvent('submit', {detail:{fields:{}}}));

//Checking that the submit FUNCTION was called with the correct rating value(4)
  • Thanks you, that works like a charm!
    – Kasper
    Mar 20 '20 at 16:38

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.