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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>disabled-state</title>
+
+  <script src="../../webcomponentsjs/webcomponents-lite.js"></script>
+  <script src="../../web-component-tester/browser.js"></script>
+  <link rel="import" href="test-elements.html">
+</head>
+<body>
+
+  <test-fixture id="TrivialDisabledState">
+    <template>
+      <test-control></test-control>
+    </template>
+  </test-fixture>
+
+  <test-fixture id="InitiallyDisabledState">
+    <template>
+      <test-control disabled></test-control>
+    </template>
+  </test-fixture>
+
+  <script>
+    suite('disabled-state', function() {
+      var disableTarget;
+
+      suite('a trivial disabled state', function() {
+        setup(function() {
+          disableTarget = fixture('TrivialDisabledState');
+        });
+
+        suite('when disabled is true', function() {
+          test('receives a disabled attribute', function() {
+            disableTarget.disabled = true;
+            expect(disableTarget.hasAttribute('disabled')).to.be.eql(true);
+          });
+
+          test('receives an appropriate aria attribute', function() {
+            disableTarget.disabled = true;
+            expect(disableTarget.getAttribute('aria-disabled')).to.be.eql('true');
+          });
+        });
+
+        suite('when disabled is false', function() {
+          test('loses the disabled attribute', function() {
+            disableTarget.disabled = true;
+            expect(disableTarget.hasAttribute('disabled')).to.be.eql(true);
+            disableTarget.disabled = false;
+            expect(disableTarget.hasAttribute('disabled')).to.be.eql(false);
+          });
+        });
+      });
+
+      suite('a state with an initially disabled target', function() {
+        setup(function() {
+          disableTarget = fixture('InitiallyDisabledState');
+        });
+
+        test('preserves the disabled attribute on target', function() {
+          expect(disableTarget.hasAttribute('disabled')).to.be.eql(true);
+          expect(disableTarget.disabled).to.be.eql(true);
+        });
+
+        test('adds `aria-disabled` to the target', function() {
+          expect(disableTarget.getAttribute('aria-disabled')).to.be.eql('true');
+        });
+      });
+    });
+  </script>
+
+</body>
+</html>