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+<!doctype html>
+<!--
+@license
+Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<html>
+<head>
+  <title>focused-state</title>
+
+  <script src="../../webcomponentsjs/webcomponents-lite.js"></script>
+  <script src="../../web-component-tester/browser.js"></script>
+  <script src="../../iron-test-helpers/mock-interactions.js"></script>
+  <link rel="import" href="test-elements.html">
+</head>
+<body>
+
+  <test-fixture id="TrivialFocusedState">
+    <template>
+      <test-control tabindex="-1"></test-control>
+    </template>
+  </test-fixture>
+
+  <test-fixture id="NestedFocusedState">
+    <template>
+      <nested-focusable></nested-focusable>
+    </template>
+  </test-fixture>
+
+  <test-fixture id="LightDOM">
+    <template>
+      <test-light-dom>
+        <input id="input">
+        <nested-focusable></nested-focusable>
+      </test-light-dom>
+    </template>
+  </test-fixture>
+
+  <script>
+    suite('focused-state', function() {
+      var focusTarget;
+
+      setup(function() {
+        focusTarget = fixture('TrivialFocusedState');
+      });
+
+      suite('when is focused', function() {
+        test('receives a focused attribute', function() {
+          expect(focusTarget.hasAttribute('focused')).to.be.eql(false);
+          MockInteractions.focus(focusTarget);
+          expect(focusTarget.hasAttribute('focused')).to.be.eql(true);
+        });
+
+        test('focused property is true', function() {
+          expect(focusTarget.focused).to.not.be.eql(true);
+          MockInteractions.focus(focusTarget);
+          expect(focusTarget.focused).to.be.eql(true);
+        });
+      });
+
+      suite('when is blurred', function() {
+        test('loses the focused attribute', function() {
+          MockInteractions.focus(focusTarget);
+          expect(focusTarget.hasAttribute('focused')).to.be.eql(true);
+          MockInteractions.blur(focusTarget);
+          expect(focusTarget.hasAttribute('focused')).to.be.eql(false);
+        });
+
+        test('focused property is false', function() {
+          MockInteractions.focus(focusTarget);
+          expect(focusTarget.focused).to.be.eql(true);
+          MockInteractions.blur(focusTarget);
+          expect(focusTarget.focused).to.be.eql(false);
+        });
+      });
+
+      suite('when the focused state is disabled', function() {
+        test('will not be focusable', function() {
+          var blurSpy = sinon.spy(focusTarget, 'blur');
+          MockInteractions.focus(focusTarget);
+          focusTarget.disabled = true;
+          expect(focusTarget.getAttribute('tabindex')).to.be.eql('-1');
+          expect(blurSpy.called).to.be.eql(true);
+        });
+      });
+    });
+
+    suite('nested focusable', function() {
+      var focusable;
+
+      setup(function() {
+        focusable = fixture('NestedFocusedState');
+      });
+
+      test('focus/blur events fired on host element', function() {
+        var nFocusEvents = 0;
+        var nBlurEvents = 0;
+
+        focusable.addEventListener('focus', function() {
+          nFocusEvents += 1;
+          expect(focusable.focused).to.be.equal(true);
+          MockInteractions.blur(focusable.$.input);
+        });
+        focusable.addEventListener('blur', function() {
+          expect(focusable.focused).to.be.equal(false);
+          nBlurEvents += 1;
+        });
+
+        MockInteractions.focus(focusable.$.input);
+
+        expect(nBlurEvents).to.be.greaterThan(0);
+        expect(nFocusEvents).to.be.greaterThan(0);
+      });
+
+    });
+
+
+    suite('elements in the light dom', function() {
+      var lightDOM, input, lightDescendantShadowInput;
+
+      setup(function() {
+        lightDOM = fixture('LightDOM');
+        input = document.querySelector('#input');
+        lightDescendantShadowInput = Polymer.dom(lightDOM)
+            .querySelector('nested-focusable').$.input;
+      });
+
+      test('should not fire the focus event', function() {
+        var nFocusEvents = 0;
+
+        lightDOM.addEventListener('focus', function() {
+          nFocusEvents += 1;
+        });
+
+        MockInteractions.focus(input);
+
+        expect(nFocusEvents).to.be.equal(0);
+      });
+
+      test('should not fire the focus event from shadow descendants', function() {
+        var nFocusEvents = 0;
+
+        lightDOM.addEventListener('focus', function() {
+          nFocusEvents += 1;
+        });
+
+        MockInteractions.focus(lightDescendantShadowInput);
+
+        expect(nFocusEvents).to.be.equal(0);
+      });
+
+    });
+
+  </script>
+
+</body>
+</html>