Files
formipay/node_modules/eslint-plugin-jest/docs/rules/prefer-spy-on.md
dwindown e8fbfb14c1 fix: prevent asset conflicts between React and Grid.js versions
Add coexistence checks to all enqueue methods to prevent loading
both React and Grid.js assets simultaneously.

Changes:
- ReactAdmin.php: Only enqueue React assets when ?react=1
- Init.php: Skip Grid.js when React active on admin pages
- Form.php, Coupon.php, Access.php: Restore classic assets when ?react=0
- Customer.php, Product.php, License.php: Add coexistence checks

Now the toggle between Classic and React versions works correctly.

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
2026-04-18 17:02:14 +07:00

1.4 KiB

Suggest using jest.spyOn() (prefer-spy-on)

🔧 This rule is automatically fixable by the --fix CLI option.

When mocking a function by overwriting a property you have to manually restore the original implementation when cleaning up. When using jest.spyOn() Jest keeps track of changes, and they can be restored with jest.restoreAllMocks(), mockFn.mockRestore() or by setting restoreMocks to true in the Jest config.

Note: The mock created by jest.spyOn() still behaves the same as the original function. The original function can be overwritten with mockFn.mockImplementation() or by some of the other mock functions.

Date.now = jest.fn(); // Original behaviour lost, returns undefined

jest.spyOn(Date, 'now'); // Turned into a mock function but behaviour hasn't changed
jest.spyOn(Date, 'now').mockImplementation(() => 10); // Will always return 10
jest.spyOn(Date, 'now').mockReturnValue(10); // Will always return 10

Rule details

This rule triggers a warning if an object's property is overwritten with a jest mock.

The following patterns are considered warnings:

Date.now = jest.fn();
Date.now = jest.fn(() => 10);

These patterns would not be considered warnings:

jest.spyOn(Date, 'now');
jest.spyOn(Date, 'now').mockImplementation(() => 10);