Project import generated by Copybara.
GitOrigin-RevId: d9e9e3fb4e31372ec1fb43b178994ca78fa8fe70
diff --git a/static_src/elements/chops/chops-checkbox/chops-checkbox.test.js b/static_src/elements/chops/chops-checkbox/chops-checkbox.test.js
new file mode 100644
index 0000000..5a11111
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+++ b/static_src/elements/chops/chops-checkbox/chops-checkbox.test.js
@@ -0,0 +1,86 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import sinon from 'sinon';
+import {ChopsCheckbox} from './chops-checkbox.js';
+
+let element;
+
+describe('chops-checkbox', () => {
+ beforeEach(() => {
+ element = document.createElement('chops-checkbox');
+ document.body.appendChild(element);
+ });
+
+ afterEach(() => {
+ document.body.removeChild(element);
+ });
+
+ it('initializes', () => {
+ assert.instanceOf(element, ChopsCheckbox);
+ });
+
+ it('clicking checkbox dispatches checked-change event', async () => {
+ element.checked = false;
+ sinon.stub(window, 'CustomEvent');
+ sinon.stub(element, 'dispatchEvent');
+
+ await element.updateComplete;
+
+ element.shadowRoot.querySelector('#checkbox').click();
+
+ assert.deepEqual(window.CustomEvent.args[0][0], 'checked-change');
+ assert.deepEqual(window.CustomEvent.args[0][1], {
+ detail: {checked: true},
+ });
+
+ assert.isTrue(window.CustomEvent.calledOnce);
+ assert.isTrue(element.dispatchEvent.calledOnce);
+
+ window.CustomEvent.restore();
+ element.dispatchEvent.restore();
+ });
+
+ it('updating checked property updates native <input>', async () => {
+ element.checked = false;
+
+ await element.updateComplete;
+
+ assert.isFalse(element.checked);
+ assert.isFalse(element.shadowRoot.querySelector('input').checked);
+
+ element.checked = true;
+
+ await element.updateComplete;
+
+ assert.isTrue(element.checked);
+ assert.isTrue(element.shadowRoot.querySelector('input').checked);
+ });
+
+ it('updating checked attribute updates native <input>', async () => {
+ element.setAttribute('checked', true);
+ await element.updateComplete;
+
+ assert.equal(element.getAttribute('checked'), 'true');
+ assert.isTrue(element.shadowRoot.querySelector('input').checked);
+
+ element.click();
+ await element.updateComplete;
+
+ // We expect the 'checked' attribute to remain the same even as the
+ // corresponding property changes when the user clicks the checkbox.
+ assert.equal(element.getAttribute('checked'), 'true');
+ assert.isFalse(element.shadowRoot.querySelector('input').checked);
+
+ element.click();
+ await element.updateComplete;
+ assert.isTrue(element.shadowRoot.querySelector('input').checked);
+
+ element.removeAttribute('checked');
+ await element.updateComplete;
+ assert.isNotTrue(element.getAttribute('checked'));
+ assert.isFalse(element.shadowRoot.querySelector('input').checked);
+ });
+});