import { getKeyboardFocusableElements } from './navigation';

describe('navigation', () => {
  describe('getKeyboardFocusableElements', () => {
    const createRootNodeRef = (content = '') => {
      const root = document.createElement('div');
      root.innerHTML = content;
      return root;
    };

    it('should return with empty array when no child of the root node', () => {
      expect(getKeyboardFocusableElements(createRootNodeRef())).toEqual([]);
    });

    it('should return with focusable tags for only elements which can be focused with tab', () => {
      const ids = getKeyboardFocusableElements(
        createRootNodeRef(`
      <a id='1'/>
      <a href="#" id='2'/>
      <button id='3'/>
      <input id='4'/>
      <textarea id='5'></textarea>
      <select id='6'></select>
      <details id='7'></details>
      <div tabindex='0' id='8'></div>
      <div tabindex='-1' id='9'></div>
      <div id='10'></div>
      <button hidden id='11'></button>
      <button aria-hidden='true' id='12'></button>
      <button aria-hidden='false' id='13'></button>
      <button disabled id='14'></button>
      <mdc-button id='15'></mdc-button>
    `)
      ).map((n) => n.id);

      expect(ids).toEqual(['2', '3', '4', '5', '6', '7', '8', '13', '15']);
    });

    it('should return with focusable tags for any elements which can be focused', () => {
      const ids = getKeyboardFocusableElements(
        createRootNodeRef(`
      <a id='1'/>
      <a href="#" id='2'/>
      <button id='3'/>
      <input id='4'/>
      <textarea id='5'></textarea>
      <select id='6'></select>
      <details id='7'></details>
      <div tabindex='0' id='8'></div>
      <div tabindex='-1' id='9'></div>
      <div id='10'></div>
      <button hidden id='11'></button>
      <button aria-hidden='true' id='12'></button>
      <button aria-hidden='false' id='13'></button>
      <button disabled id='14'></button>
    `),
        { includeTabbableOnly: false }
      ).map((n) => n.id);

      expect(ids).toEqual(['2', '3', '4', '5', '6', '7', '8', '9', '13']);
    });

    it('should return filter out disabled and aria hidden nodes', () => {
      const ids = getKeyboardFocusableElements(
        createRootNodeRef(`
        <button disabled id='1' />
        <button aria-hidden='true' id='2' />
        <button aria-hidden='false' id='3'/>
    `)
      ).map((n) => n.id);

      expect(ids).toEqual(['3']);
    });

    describe.each`
      format
      ${'attribute'}
      ${'class name'}
    `('preserve tabindex with $format', (format) => {
      const getAttributes = () => {
        return format === 'attribute'
          ? 'data-preserve-tabindex'
          : 'class="md-nav-preserve-tabindex"';
      };
      it(`should filter out elements flagged with preserved tabindex ${format} nodes`, () => {
        const ids = getKeyboardFocusableElements(
          createRootNodeRef(`
        <button ${getAttributes()} id='1' />
    `)
        ).map((n) => n.id);

        expect(ids).toEqual([]);
      });

      it(`should filter out elements if any parent flagged with preserved ${format} tabindex`, () => {
        const ids = getKeyboardFocusableElements(
          createRootNodeRef(`
          <div>
            <div ${getAttributes()}>
              <button id='1' />
              <div>
                <input id='2''>
              </div>
            </div>
                    <div ${getAttributes()}>
              <input id='3' />
              <div>
                <button id='4''>
              </div>
            </div>
        </div>
      `)
        ).map((n) => n.id);

        expect(ids).toEqual([]);
      });

      it(`should not check preserved tabindex ${format} for parent of the root node`, () => {
        const dom = createRootNodeRef(`
          <div ${getAttributes()}>
            <div id='root'>
              <button id='1' />
              <div ${getAttributes()}>
                <input id='2''>
              </div>
            </div>
        </div>
      `);

        const ids = getKeyboardFocusableElements(dom.querySelector('#root') as any).map(
          (n) => n.id
        );

        expect(ids).toEqual(['1']);
      });
    });

    it('should exclude tabIndex="" when includeTabbableOnly is true', () => {
      const ids = getKeyboardFocusableElements(
        createRootNodeRef(`
        <button id="1" tabindex='0' />
        <button id="2" disabled tabindex='' />
    `)
      ).map((n) => n.id);

      expect(ids).toEqual(['1']);
    });

    it('should exclude tabIndex="-1" when includeTabbableOnly is false', () => {
      const ids = getKeyboardFocusableElements(
        createRootNodeRef(`
        <button id="1" tabindex='0' />
        <button id="2" disabled tabindex='-1' />
    `),
        { includeTabbableOnly: false }
      ).map((n) => n.id);

      expect(ids).toEqual(['1']);
    });

    it('should exclude data-exclude-focus', () => {
      const ids = getKeyboardFocusableElements(
        createRootNodeRef(`
        <button id="1" tabindex='0' />
        <button id="2" data-exclude-focus />
    `)
      ).map((n) => n.id);

      expect(ids).toEqual(['1']);
    });
  });
});