simulate('mouseleave') triggers onMouseLeave event when button is disabled

[tulsidaskhatri]

Events like onClick, onMouseEnter and onMouseLeave are not triggered if button is disabled, simulate function works fine for click and mouseenter but it doesn't not work for mouseleave event.

Current behavior

Unlike click and mouseenter, simulate triggers mouseleave for disable button.

import {mount} from 'enzyme';

describe('button', () => {
    it('should not trigger onClick when button is disabled', () => {
        const handleClick = jest.fn();
        const wrapper = mount(
            <button disabled onClick={handleClick}>
                Text
            </button>
        );
        wrapper.simulate('click');
        expect(handleClick).not.toHaveBeenCalled();
    });
    it('should not trigger onMouseEnter when button is disabled', () => {
        const handleMouseEnter = jest.fn();
        const wrapper = mount(
            <button disabled onMouseEnter={handleMouseEnter}>
                Text
            </button>
        );
        wrapper.simulate('mouseenter');
        expect(handleMouseEnter).not.toHaveBeenCalled();
    });
    it('should not trigger onMouseLeave when button is disabled', () => {
        const handleMouseLeave = jest.fn();
        const wrapper = mount(
            <button disabled onMouseLeave={handleMouseLeave}>
                Text
            </button>
        );
        wrapper.simulate('mouseleave');
        expect(handleMouseLeave).not.toHaveBeenCalled();
    });
});

Third test case (should not trigger onMouseLeave when button is disabled) fails.

Expected behavior

Third test case (should not trigger onMouseLeave when button is disabled) passes.

Your environment

MacOS
Yarn
Visual Studio Code

API

• shallow
• mount
• render

Version

library	version
enzyme	3.11.0
react	16.14.0
react-dom	16.14.0
react-test-renderer	n/a
adapter (below)

Adapter

• enzyme-adapter-react-16
• enzyme-adapter-react-16.2
• enzyme-adapter-react-16.3
• enzyme-adapter-react-16.1
• enzyme-adapter-react-15
• enzyme-adapter-react-15.4
• enzyme-adapter-react-14
• enzyme-adapter-react-13
• enzyme-adapter-react-helper
• others ( )

[ljharb]

For mount, this behavior is controlled by react-dom/test-utils, so i think you'll need to file a bug on react itself for this.

[tulsidaskhatri]

reported to react
facebook/react#20966