Inject layout through onLayout's View

[ALWAL12]

I have a component that vary its rendering depending on its width. To achieve this, I use the onLayout property of View component. Hence, in my tests, I don't seem to be able to inject a mocked layout and the method onLayout does not seem to be called at all.

Example of a snapshot test:

import 'react-native';
import React from 'react';
import renderer from 'react-test-renderer';
// my components
import RequirementAssignees from '../RequirementAssignees';
import Account from '../../../authentication/domain/Account';
import Assignment from '../../domain/Assignment';

describe('<RequirementAssignees />', () => {
  it('can render few assignments ', () => {
    const assignments = [
      new Assignment({ id: 1, account: new Account({ id: 100, firstName: 'John', lastName: 'Doe' }) }),
      new Assignment({ id: 2, account: new Account({ id: 200, firstName: 'Jane', lastName: 'Doe' }) }),
      new Assignment({ id: 3, account: new Account({ id: 300, firstName: 'Uncle', lastName: 'Sam' }) }),
      new Assignment({ id: 4, account: new Account({ id: 400, firstName: 'Aunt', lastName: 'Nina' }) }),
    ];

    const tree = renderer.create(
      <RequirementAssignees assignments={assignments} />
    ).toJSON();

    expect(tree).toMatchSnapshot();
  });
});

I'm not sure how to approach this.

Version
jest: 15.1.1
node: v5.3.0
npm: 3.3.12
OS: Windows 10

[cpojer]

We are not going to be able to help you without a repository that shows this issue. Note that this is unlikely a Jest issue but rather a testing question on how to write a test for a specific react-native component. Feel free to add more info but I'm going to close this to manage our queue.

Happy to reopen if this turns out to be a Jest issue.

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.
Please note this issue tracker is not a help forum. We recommend using StackOverflow or our discord channel for questions.