react/packages/react-dom/src/__tests__/DOMPropertyOperations-test.js

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @emails react-core
 */

'use strict';

describe('DOMPropertyOperations', () => {
  var React;
  var ReactDOM;

  beforeEach(() => {
    jest.resetModules();
    React = require('react');
    ReactDOM = require('react-dom');
  });

  describe('setValueForProperty', () => {
    it('should set values as properties by default', () => {
      var container = document.createElement('div');
      ReactDOM.render(<div title="Tip!" />, container);
      expect(container.firstChild.title).toBe('Tip!');
    });

    it('should set values as attributes if necessary', () => {
      var container = document.createElement('div');
      ReactDOM.render(<div role="#" />, container);
      expect(container.firstChild.getAttribute('role')).toBe('#');
      expect(container.firstChild.role).toBeUndefined();
    });

    it('should set values as namespace attributes if necessary', () => {
      var container = document.createElement('svg');
      ReactDOM.render(<image xlinkHref="about:blank" />, container);
      expect(
        container.firstChild.getAttributeNS(
          'http://www.w3.org/1999/xlink',
          'href',
        ),
      ).toBe('about:blank');
    });

    it('should set values as boolean properties', () => {
      var container = document.createElement('div');
      ReactDOM.render(<div disabled="disabled" />, container);
      expect(container.firstChild.getAttribute('disabled')).toBe('');
      ReactDOM.render(<div disabled={true} />, container);
      expect(container.firstChild.getAttribute('disabled')).toBe('');
      ReactDOM.render(<div disabled={false} />, container);
      expect(container.firstChild.getAttribute('disabled')).toBe(null);
      ReactDOM.render(<div disabled={true} />, container);
      ReactDOM.render(<div disabled={null} />, container);
      expect(container.firstChild.getAttribute('disabled')).toBe(null);
      ReactDOM.render(<div disabled={true} />, container);
      ReactDOM.render(<div disabled={undefined} />, container);
      expect(container.firstChild.getAttribute('disabled')).toBe(null);
    });

    it('should convert attribute values to string first', () => {
      // Browsers default to this behavior, but some test environments do not.
      // This ensures that we have consistent behavior.
      var obj = {
        toString: function() {
          return 'css-class';
        },
      };

      var container = document.createElement('div');
      ReactDOM.render(<div className={obj} />, container);
      expect(container.firstChild.getAttribute('class')).toBe('css-class');
    });

    it('should not remove empty attributes for special properties', () => {
      var container = document.createElement('div');
      ReactDOM.render(<input value="" />, container);
      expect(container.firstChild.getAttribute('value')).toBe('');
      expect(container.firstChild.value).toBe('');
    });

    it('should remove for falsey boolean properties', () => {
      var container = document.createElement('div');
      ReactDOM.render(<div allowFullScreen={false} />, container);
      expect(container.firstChild.hasAttribute('allowFullScreen')).toBe(false);
    });

    it('should remove when setting custom attr to null', () => {
      var container = document.createElement('div');
      ReactDOM.render(<div data-foo="bar" />, container);
      expect(container.firstChild.hasAttribute('data-foo')).toBe(true);
      ReactDOM.render(<div data-foo={null} />, container);
      expect(container.firstChild.hasAttribute('data-foo')).toBe(false);
    });

    it('should set className to empty string instead of null', () => {
      var container = document.createElement('div');
      ReactDOM.render(<div className="selected" />, container);
      expect(container.firstChild.className).toBe('selected');
      ReactDOM.render(<div className={null} />, container);
      // className should be '', not 'null' or null (which becomes 'null' in
      // some browsers)
      expect(container.firstChild.className).toBe('');
      expect(container.firstChild.getAttribute('class')).toBe(null);
    });

    it('should remove property properly for boolean properties', () => {
      var container = document.createElement('div');
      ReactDOM.render(<div hidden={true} />, container);
      expect(container.firstChild.hasAttribute('hidden')).toBe(true);
      ReactDOM.render(<div hidden={false} />, container);
      expect(container.firstChild.hasAttribute('hidden')).toBe(false);
    });
  });

  describe('value mutation method', function() {
    it('should update an empty attribute to zero', function() {
      var container = document.createElement('div');
      ReactDOM.render(
        <input type="radio" value="" onChange={function() {}} />,
        container,
      );
      spyOn(container.firstChild, 'setAttribute');
      ReactDOM.render(
        <input type="radio" value={0} onChange={function() {}} />,
        container,
      );
      expect(container.firstChild.setAttribute.calls.count()).toBe(1);
    });

    it('should always assign the value attribute for non-inputs', function() {
      var container = document.createElement('div');
      ReactDOM.render(<progress />, container);
      spyOn(container.firstChild, 'setAttribute');
      ReactDOM.render(<progress value={30} />, container);
      ReactDOM.render(<progress value="30" />, container);
      expect(container.firstChild.setAttribute.calls.count()).toBe(2);
    });
  });

  describe('deleteValueForProperty', () => {
    it('should remove attributes for normal properties', () => {
      var container = document.createElement('div');
      ReactDOM.render(<div title="foo" />, container);
      expect(container.firstChild.getAttribute('title')).toBe('foo');
      ReactDOM.render(<div />, container);
      expect(container.firstChild.getAttribute('title')).toBe(null);
    });

    it('should not remove attributes for special properties', () => {
      var container = document.createElement('div');
      spyOn(console, 'error');
      ReactDOM.render(
        <input type="text" value="foo" onChange={function() {}} />,
        container,
      );
      expect(container.firstChild.getAttribute('value')).toBe('foo');
      expect(container.firstChild.value).toBe('foo');
      ReactDOM.render(
        <input type="text" onChange={function() {}} />,
        container,
      );
      expect(container.firstChild.getAttribute('value')).toBe('foo');
      expect(container.firstChild.value).toBe('foo');
      expect(console.error.calls.count()).toBe(1);
      expect(console.error.calls.argsFor(0)[0]).toContain(
        'A component is changing a controlled input of type text to be uncontrolled',
      );
    });
  });
});