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| @license |
| Copyright (C) 2017 The Android Open Source Project |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
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| http://www.apache.org/licenses/LICENSE-2.0 |
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| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| |
| <meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes"> |
| <title>gr-attribute-helper</title> |
| |
| <script src="/node_modules/@webcomponents/webcomponentsjs/custom-elements-es5-adapter.js"></script> |
| |
| <script src="/node_modules/@webcomponents/webcomponentsjs/webcomponents-lite.js"></script> |
| <script src="/components/wct-browser-legacy/browser.js"></script> |
| |
| <dom-element id="some-element"> |
| <script type="module"> |
| import '../../../test/common-test-setup.js'; |
| import {Polymer} from '@polymer/polymer/lib/legacy/polymer-fn.js'; |
| Polymer({ |
| is: 'some-element', |
| properties: { |
| fooBar: { |
| type: Object, |
| notify: true, |
| }, |
| }, |
| }); |
| </script> |
| |
| </dom-element> |
| |
| <test-fixture id="basic"> |
| <template> |
| <some-element></some-element> |
| </template> |
| </test-fixture> |
| |
| <script type="module"> |
| import {GrAttributeHelper} from './gr-attribute-helper.js'; |
| |
| suite('gr-attribute-helper tests', () => { |
| let element; |
| let instance; |
| let sandbox; |
| |
| setup(() => { |
| sandbox = sinon.sandbox.create(); |
| element = fixture('basic'); |
| instance = new GrAttributeHelper(element); |
| }); |
| |
| teardown(() => { |
| sandbox.restore(); |
| }); |
| |
| test('resolved on value change from undefined', () => { |
| const promise = instance.get('fooBar').then(value => { |
| assert.equal(value, 'foo! bar!'); |
| }); |
| element.fooBar = 'foo! bar!'; |
| return promise; |
| }); |
| |
| test('resolves to current attribute value', () => { |
| element.fooBar = 'foo-foo-bar'; |
| const promise = instance.get('fooBar').then(value => { |
| assert.equal(value, 'foo-foo-bar'); |
| }); |
| element.fooBar = 'no bar'; |
| return promise; |
| }); |
| |
| test('bind', () => { |
| const stub = sandbox.stub(); |
| element.fooBar = 'bar foo'; |
| const unbind = instance.bind('fooBar', stub); |
| element.fooBar = 'partridge in a foo tree'; |
| element.fooBar = 'five gold bars'; |
| assert.equal(stub.callCount, 3); |
| assert.deepEqual(stub.args[0], ['bar foo']); |
| assert.deepEqual(stub.args[1], ['partridge in a foo tree']); |
| assert.deepEqual(stub.args[2], ['five gold bars']); |
| stub.reset(); |
| unbind(); |
| instance.fooBar = 'ladies dancing'; |
| assert.isFalse(stub.called); |
| }); |
| }); |
| </script> |
