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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>iron-meta</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="../iron-meta.html">
+    <link rel="import" href="../../test-fixture/test-fixture.html">
+
+  </head>
+  <body>
+
+    <test-fixture id="TrivialMeta">
+      <template>
+        <iron-meta self key="info"></iron-meta>
+      </template>
+    </test-fixture>
+
+    <test-fixture id="ManyMetas">
+      <template>
+        <iron-meta self key="default1"></iron-meta>
+        <iron-meta self key="default2"></iron-meta>
+        <iron-meta self key="default3"></iron-meta>
+      </template>
+    </test-fixture>
+
+    <test-fixture id="DifferentTypedMetas">
+      <template>
+        <iron-meta self type="foo" key="foobarKey"></iron-meta>
+        <iron-meta self type="bar" key="foobarKey"></iron-meta>
+        <iron-meta self key="defaultKey"></iron-meta>
+      </template>
+    </test-fixture>
+
+    <test-fixture id="ClashingMetas">
+      <template>
+        <iron-meta self key="baz"></iron-meta>
+        <iron-meta self key="baz"></iron-meta>
+      </template>
+    </test-fixture>
+
+    <script>
+suite('<iron-meta>', function () {
+  suite('basic behavior', function () {
+    var meta;
+
+    setup(function () {
+      meta = fixture('TrivialMeta');
+    });
+
+    teardown(function () {
+      meta.key = null;
+    });
+
+    test('uses itself as the default value', function () {
+      expect(meta.value).to.be.equal(meta);
+    });
+
+    test('can be assigned alternative values', function () {
+      meta.value = 'foobar';
+
+      expect(meta.list[0]).to.be.equal('foobar');
+    });
+
+    test('can access same-type meta values by key', function () {
+      expect(meta.byKey(meta.key)).to.be.equal(meta.value);
+    });
+
+    test('yields a list of same-type meta data', function () {
+      expect(meta.list).to.be.ok;
+      expect(meta.list.length).to.be.equal(1);
+      expect(meta.list[0]).to.be.equal(meta);
+    });
+  });
+
+  suite('many same-typed metas', function () {
+    var metas;
+
+    setup(function () {
+      metas = fixture('ManyMetas');
+    });
+
+    teardown(function () {
+      metas.forEach(function (meta) {
+        meta.key = null;
+      });
+    });
+
+    test('all cache all meta values', function () {
+      metas.forEach(function (meta, index) {
+        expect(meta.list.length).to.be.equal(metas.length);
+        expect(meta.list[index].value).to.be.equal(meta.value);
+      });
+    });
+
+    test('can be unregistered individually', function () {
+      metas[0].key = null;
+
+      expect(metas[0].list.length).to.be.equal(2);
+      expect(metas[0].list).to.be.deep.equal([metas[1], metas[2]])
+    });
+
+    test('can access each others value by key', function () {
+      expect(metas[0].byKey('default2')).to.be.equal(metas[1].value);
+    });
+  });
+
+  suite('different-typed metas', function () {
+    var metas;
+
+    setup(function () {
+      metas = fixture('DifferentTypedMetas');
+    });
+
+    teardown(function () {
+      metas.forEach(function (meta) {
+        meta.key = null;
+      });
+    });
+
+    test('cache their values separately', function () {
+      var fooMeta = metas[0];
+      var barMeta = metas[1];
+
+      expect(fooMeta.value).to.not.be.equal(barMeta.value);
+      expect(fooMeta.byKey('foobarKey')).to.be.equal(fooMeta.value);
+      expect(barMeta.byKey('foobarKey')).to.be.equal(barMeta.value);
+    });
+
+    test('cannot access values of other types', function () {
+      var defaultMeta = metas[2];
+
+      expect(defaultMeta.byKey('foobarKey')).to.be.equal(undefined);
+    });
+
+    test('only list values of their type', function () {
+      metas.forEach(function (meta) {
+        expect(meta.list.length).to.be.equal(1);
+        expect(meta.list[0]).to.be.equal(meta.value);
+      })
+    });
+  });
+
+  suite('metas with clashing keys', function () {
+    var metaPair;
+
+    setup(function () {
+      metaPair = fixture('ClashingMetas');
+    });
+
+    teardown(function () {
+      metaPair.forEach(function (meta) {
+        meta.key = null;
+      });
+    });
+
+    test('let the last value win registration against the key', function () {
+      var registeredValue = metaPair[0].byKey(metaPair[0].key);
+      var firstValue = metaPair[0].value;
+      var secondValue = metaPair[1].value;
+
+      expect(registeredValue).to.not.be.equal(firstValue);
+      expect(registeredValue).to.be.equal(secondValue);
+    });
+  });
+
+  suite('singleton', function () {
+
+    test('only one ironmeta created', function () {
+      var first = Polymer.IronMeta.getIronMeta();
+      var second = Polymer.IronMeta.getIronMeta();
+      expect(first).to.be.equal(second);
+    });
+  });
+});
+    </script>
+
+  </body>
+</html>