javascript/atoms/test/text_shadow_test.html

<!DOCTYPE html>
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<html>

<head>
  <title>text_test.html</title>
  <meta charset="utf-8">
  <link rel="stylesheet" href="/filez/_main/third_party/js/qunit/qunit.css">
  <script src="/filez/_main/third_party/js/qunit/qunit.js"></script>
  <script src="/filez/_main/third_party/js/qunit/qunit_test_runner.js"></script>
  <script src="test_bootstrap.js"></script>
  <script type="text/javascript">
    goog.require('bot.dom');
    goog.require('bot.locators');
  </script>

  <script type="text/javascript">
    var findElement = bot.locators.findElement;
    var getText = bot.dom.getVisibleText;

    customElements.define('open-shadow-element',
      class extends HTMLElement {
        constructor() {
          super();
          this.attachShadow({ mode: 'open' });
        }
      }
    );

    customElements.define('closed-shadow-element',
      class extends HTMLElement {
        constructor() {
          super();
          this._shadowRoot = this.attachShadow({ mode: 'closed' });
        }
      }
    );

    function setCustomElement(html, type='open') {
      if (type == 'closed') {
        document.querySelector(`closed-shadow-element`)._shadowRoot.innerHTML = html;
      } else {
        // Set shadow DOM on ALL open-shadow-element instances
        document.querySelectorAll(`open-shadow-element`).forEach(elem => {
          elem.shadowRoot.innerHTML = html;
        });
      }
    }

    QUnit.testDone(function() {
      document.querySelectorAll('open-shadow-element').forEach(elem => {
        elem.shadowRoot.innerHTML = '';
      });
      let closed = document.querySelector('closed-shadow-element');
      closed._shadowRoot.innerHTML = '';
    });

    QUnit.test('text in shadow DOM', function(assert) {
      setCustomElement('<div><a href=# id=linkText>full link text</a></div>');

      let customEl = findElement({ tagName: 'open-shadow-element' });
      let text = getText(customEl);
      assert.strictEqual(text, 'full link text');
    });

    QUnit.test('text for slot value in shadow DOM', function(assert) {
      setCustomElement('<slot><span>full</span></slot>');

      let customEl = findElement({ id: 'custom-text' });
      let text = getText(customEl);
      assert.strictEqual(text, 'custom');
    });

    QUnit.test('text for slot and extra value in shadow DOM', function(assert) {
      setCustomElement('<slot><span>full</span></slot> text');

      let customEl = findElement({ id: 'custom-text' });
      let text = getText(customEl);
      assert.strictEqual(text, 'custom text');
    });

    QUnit.test('text for default slot value in shadow DOM', function(assert) {
      setCustomElement('<slot><span>full</span></slot> text');

      let customEl = findElement({ tagName: 'open-shadow-element' });
      let text = getText(customEl);
      assert.strictEqual(text, 'full text');
    });

    QUnit.test('hidden text in shadow DOM', function(assert) {
      setCustomElement(
        '<div><a href=# id=linkText>full <div style="display:none">link</div> text</a></div>'
      );

      let customEl = findElement({ tagName: 'open-shadow-element' });
      let text = getText(customEl);
      assert.strictEqual(text, 'full text');
    });

    QUnit.test('text for element within closed shadow DOM', function(assert) {
      setCustomElement('<a href=# id=linkText>full link text</a>', 'closed');
      let customEl = findElement({ tagName: 'closed-shadow-element' });
      let innerEl = findElement({ css: 'a' }, customEl._shadowRoot);
      let text = getText(innerEl);
      assert.strictEqual(text, 'full link text');
    });
  </script>
</head>

<body>
  <div id="qunit"></div>
  <div id="qunit-fixture"></div>
  <open-shadow-element></open-shadow-element>
  <open-shadow-element id="custom-text">custom</open-shadow-element>
  <closed-shadow-element></closed-shadow-element>
</body>

</html>