chrome-devtools-frontend
Version:
Chrome DevTools UI
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text/typescript
// 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 * as UI from './legacy.js';
describe('ListModel', () => {
it('can be instantiated correctly without a list of items', () => {
const model = new UI.ListModel.ListModel();
assert.deepEqual([...model], []);
});
it('can be instantiated correctly with a list of items', () => {
const model = new UI.ListModel.ListModel([4, 5, 6]);
assert.deepEqual([...model], [4, 5, 6]);
});
it('supports replacing all list elements', () => {
const model = new UI.ListModel.ListModel();
model.replaceAll([0, 1, 2]);
assert.deepEqual([...model], [0, 1, 2]);
});
it('supports replacing a range of list elements', () => {
const model = new UI.ListModel.ListModel([0, 1, 2]);
model.replaceRange(0, 1, [5, 6, 7]);
assert.deepEqual([...model], [5, 6, 7, 1, 2]);
});
it('supports inserting new list elements', () => {
const model = new UI.ListModel.ListModel([5, 6, 7, 1, 2]);
model.insert(model.length, 10);
assert.deepEqual([...model], [5, 6, 7, 1, 2, 10]);
});
it('supports removing list elements', () => {
const model = new UI.ListModel.ListModel([5, 6, 7, 1, 2, 10]);
model.remove(model.length - 1);
assert.deepEqual([...model], [5, 6, 7, 1, 2]);
});
it('supports removing list elements', () => {
const model = new UI.ListModel.ListModel([5, 6, 7, 1, 2]);
model.remove(4);
assert.deepEqual([...model], [5, 6, 7, 1]);
});
it('supports replacing list elements in place', () => {
const model = new UI.ListModel.ListModel([5, 6, 7, 1]);
model.insert(1, 8);
assert.deepEqual([...model], [5, 8, 6, 7, 1]);
});
it('supports replacing list elements in place', () => {
const model = new UI.ListModel.ListModel([
0, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 4, 5, 6, 27, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 28, 29,
]);
model.replaceRange(0, 29, []);
assert.deepEqual([...model], [29]);
});
it('fires an event when elements are replaced', () => {
const model = new UI.ListModel.ListModel([0, 1, 2]);
let eventData!: {index: number, removed: number[], inserted: number, keepSelectedIndex?: boolean|undefined};
model.addEventListener(
UI.ListModel.Events.ITEMS_REPLACED, (event: {data: UI.ListModel.ItemsReplacedEvent<number>}) => {
eventData = event.data;
});
model.replaceRange(0, 1, [5, 6, 7]);
assert.deepEqual([...model], [5, 6, 7, 1, 2]);
assert.deepEqual(eventData, {
index: 0,
removed: [0],
inserted: 3,
keepSelectedIndex: undefined,
});
});
});