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import { strictEqual, deepStrictEqual, notStrictEqual, throws } from 'assert';
import html from '../lib/html';
import release from '../lib/release';
import Transaction from '../lib/transaction';
import reconcileTrees from '../lib/tasks/reconcile-trees';
import syncTrees from '../lib/tasks/sync-trees';
import validateMemory from './util/validate-memory';
describe('Tasks', function() {
beforeEach(() => {
this.fixture = document.createElement('div');
});
afterEach(() => {
release(this.fixture);
validateMemory();
});
describe('reconcileTrees', () => {
it('will upgrade the domNode to a Virtual Tree', () => {
const transaction = Transaction.create(this.fixture, html`<div/>`, {});
reconcileTrees(transaction);
deepStrictEqual(transaction.oldTree, {
rawNodeName: 'DIV',
nodeName: 'div',
nodeValue: '',
nodeType: 1,
key: '',
childNodes: [],
attributes: {},
});
});
it('will upgrade a document fragment to a Virtual Tree', () => {
const fragment = document.createDocumentFragment();
const transaction = Transaction.create(fragment, '<div/>', {});
reconcileTrees(transaction);
deepStrictEqual(transaction.oldTree, {
rawNodeName: '#document-fragment',
nodeName: '#document-fragment',
nodeValue: '',
nodeType: 11,
key: '',
childNodes: [],
attributes: {},
});
release(fragment);
});
it('will not upgrade the domNode if it is the exact same as before', () => {
const transaction = Transaction.create(this.fixture, html`<div/>`, {});
reconcileTrees(transaction);
transaction.state.oldTree = transaction.oldTree;
const { oldTree } = transaction;
deepStrictEqual(oldTree, {
rawNodeName: 'DIV',
nodeName: 'div',
nodeValue: '',
nodeType: 1,
key: '',
childNodes: [],
attributes: {},
});
const secondTransaction = Transaction.create(this.fixture, html`<div/>`, {});
reconcileTrees(secondTransaction);
deepStrictEqual(oldTree, secondTransaction.oldTree);
});
it('will upgrade the domNode if it is not the exact same as before', () => {
const transaction = Transaction.create(this.fixture, html`<div/>`, {});
reconcileTrees(transaction);
transaction.state.oldTree = transaction.oldTree;
deepStrictEqual(transaction.oldTree, {
rawNodeName: 'DIV',
nodeName: 'div',
nodeValue: '',
nodeType: 1,
key: '',
childNodes: [],
attributes: {},
});
// Start mutation observer for changes.
transaction.end();
// Change the markup slightly.
this.fixture.appendChild(document.createElement('span'));
const secondTransaction = Transaction.create(this.fixture, html`<div/>`, {});
reconcileTrees(secondTransaction);
deepStrictEqual(secondTransaction.oldTree, {
rawNodeName: 'DIV',
nodeName: 'div',
nodeValue: '',
nodeType: 1,
key: '',
childNodes: [{
attributes: {},
childNodes: [],
key: '',
nodeName: 'span',
nodeType: 1,
nodeValue: '',
rawNodeName: 'SPAN',
}],
attributes: {},
});
});
it('will upgrade a component and bring over attributes', () => {
function Component() {}
const component = html`<${Component} test="true" />`;
const transaction = Transaction.create(this.fixture, component, {});
reconcileTrees(transaction);
deepStrictEqual(transaction.newTree, {
rawNodeName: Component,
nodeName: '#document-fragment',
nodeValue: '',
nodeType: 11,
key: '',
childNodes: [],
attributes: {
test: 'true',
},
});
});
it('will upgrade an array literal to a fragment (innerHTML)', () => {
const children = [
html`<div>Hello world</div>`,
html`<span>Cool</span>`,
];
const options = { inner: true };
const transaction = Transaction.create(this.fixture, children, options);
reconcileTrees(transaction);
deepStrictEqual(transaction.newTree, {
rawNodeName: 'div',
nodeName: 'div',
nodeValue: '',
nodeType: 1,
key: '',
childNodes: children,
attributes: {},
});
});
it('will upgrade an array literal to a fragment (outerHTML)', () => {
const children = [
html`<div>Hello world</div>`,
html`<span>Cool</span>`,
];
const options = { inner: false };
const transaction = Transaction.create(this.fixture, children, options);
reconcileTrees(transaction);
deepStrictEqual(transaction.newTree, {
rawNodeName: '#document-fragment',
nodeName: '#document-fragment',
nodeValue: '',
nodeType: 11,
key: '',
childNodes: children,
attributes: {},
});
});
});
describe('syncTrees', () => {
it('will error if patches passed is not an array', () => {
throws(() => syncTrees(null, null, 5));
});
it('will error if oldTree is missing', () => {
throws(() => syncTrees(null));
});
});
});