bower_components/iron-collapse/test/horizontal.html

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<html>
  <head>
    <title>iron-collapse-horizontal</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="../../webcomponentsjs/webcomponents-lite.js"></script>
    <script src="../../web-component-tester/browser.js"></script>
    <script src="../../test-fixture/test-fixture-mocha.js"></script>
    <link rel="import" href="../../test-fixture/test-fixture.html">
    <link rel="import" href="../iron-collapse.html">
  </head>
  <body>
    <test-fixture id="test">
      <template>
        <iron-collapse id="collapse" opened horizontal>
          <div style="width:100px;">
            Lorem ipsum
          </div>
        </iron-collapse>
      </template>
    </test-fixture>
    <script>
      suite('horizontal', function() {
        var collapse;
        var collapseWidth;
        setup(function () {
          collapse = fixture('test');
          collapseWidth = getComputedStyle(collapse).width;
        });
        test('opened attribute', function() {
          assert.equal(collapse.opened, true);
        });
        test('horizontal attribute', function() {
          assert.equal(collapse.horizontal, true);
        });
        test('default opened width', function() {
          assert.equal(collapse.style.width, 'auto');
        });
        test('set opened to false, then to true', function(done) {
          // This listener will be triggered twice (every time `opened` changes).
          collapse.addEventListener('transitionend', function() {
            if (collapse.opened) {
              // Check finalSize after animation is done.
              assert.equal(collapse.style.width, 'auto');
              done();
            } else {
              // Check if size is still 0px.
              assert.equal(collapse.style.width, '0px');
              // Trigger 2nd toggle.
              collapse.opened = true;
              // Size should be immediately set.
              assert.equal(collapse.style.width, collapseWidth);
            }
          });
          // Trigger 1st toggle.
          collapse.opened = false;
          // Size should be immediately set.
          assert.equal(collapse.style.width, '0px');
        });
      });
    </script>
  </body>
</html>