565 lines
22 KiB
TypeScript
565 lines
22 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import * as html from '../../src/ml_parser/ast';
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import {HtmlParser, ParseTreeResult, TreeError} from '../../src/ml_parser/html_parser';
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import {TokenType} from '../../src/ml_parser/lexer';
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import {ParseError} from '../../src/parse_util';
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import {humanizeDom, humanizeDomSourceSpans, humanizeLineColumn} from './ast_spec_utils';
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{
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describe('HtmlParser', () => {
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let parser: HtmlParser;
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beforeEach(() => {
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parser = new HtmlParser();
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});
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describe('parse', () => {
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describe('text nodes', () => {
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it('should parse root level text nodes', () => {
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expect(humanizeDom(parser.parse('a', 'TestComp'))).toEqual([[html.Text, 'a', 0]]);
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});
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it('should parse text nodes inside regular elements', () => {
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expect(humanizeDom(parser.parse('<div>a</div>', 'TestComp'))).toEqual([
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[html.Element, 'div', 0], [html.Text, 'a', 1]
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]);
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});
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it('should parse text nodes inside <ng-template> elements', () => {
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expect(humanizeDom(parser.parse('<ng-template>a</ng-template>', 'TestComp'))).toEqual([
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[html.Element, 'ng-template', 0], [html.Text, 'a', 1]
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]);
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});
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it('should parse CDATA', () => {
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expect(humanizeDom(parser.parse('<![CDATA[text]]>', 'TestComp'))).toEqual([
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[html.Text, 'text', 0]
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]);
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});
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});
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describe('elements', () => {
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it('should parse root level elements', () => {
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expect(humanizeDom(parser.parse('<div></div>', 'TestComp'))).toEqual([
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[html.Element, 'div', 0]
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]);
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});
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it('should parse elements inside of regular elements', () => {
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expect(humanizeDom(parser.parse('<div><span></span></div>', 'TestComp'))).toEqual([
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[html.Element, 'div', 0], [html.Element, 'span', 1]
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]);
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});
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it('should parse elements inside <ng-template> elements', () => {
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expect(humanizeDom(parser.parse('<ng-template><span></span></ng-template>', 'TestComp')))
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.toEqual([[html.Element, 'ng-template', 0], [html.Element, 'span', 1]]);
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});
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it('should support void elements', () => {
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expect(humanizeDom(parser.parse('<link rel="author license" href="/about">', 'TestComp')))
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.toEqual([
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[html.Element, 'link', 0],
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[html.Attribute, 'rel', 'author license'],
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[html.Attribute, 'href', '/about'],
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]);
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});
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it('should not error on void elements from HTML5 spec',
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() => { // http://www.w3.org/TR/html-markup/syntax.html#syntax-elements without:
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// <base> - it can be present in head only
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// <meta> - it can be present in head only
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// <command> - obsolete
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// <keygen> - obsolete
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['<map><area></map>',
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'<div><br></div>',
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'<colgroup><col></colgroup>',
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'<div><embed></div>',
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'<div><hr></div>',
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'<div><img></div>',
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'<div><input></div>',
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'<object><param>/<object>',
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'<audio><source></audio>',
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'<audio><track></audio>',
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'<p><wbr></p>',
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].forEach((html) => {
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expect(parser.parse(html, 'TestComp').errors).toEqual([]);
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});
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});
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it('should close void elements on text nodes', () => {
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expect(humanizeDom(parser.parse('<p>before<br>after</p>', 'TestComp'))).toEqual([
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[html.Element, 'p', 0],
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[html.Text, 'before', 1],
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[html.Element, 'br', 1],
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[html.Text, 'after', 1],
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]);
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});
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it('should support optional end tags', () => {
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expect(humanizeDom(parser.parse('<div><p>1<p>2</div>', 'TestComp'))).toEqual([
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[html.Element, 'div', 0],
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[html.Element, 'p', 1],
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[html.Text, '1', 2],
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[html.Element, 'p', 1],
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[html.Text, '2', 2],
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]);
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});
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it('should support nested elements', () => {
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expect(humanizeDom(parser.parse('<ul><li><ul><li></li></ul></li></ul>', 'TestComp')))
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.toEqual([
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[html.Element, 'ul', 0],
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[html.Element, 'li', 1],
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[html.Element, 'ul', 2],
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[html.Element, 'li', 3],
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]);
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});
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/**
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* Certain elements (like <tr> or <col>) require parent elements of a certain type (ex. <tr>
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* can only be inside <tbody> / <thead>). The Angular HTML parser doesn't validate those
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* HTML compliancy rules as "problematic" elements can be projected - in such case HTML (as
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* written in an Angular template) might be "invalid" (spec-wise) but the resulting DOM will
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* still be correct.
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*/
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it('should not wraps elements in a required parent', () => {
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expect(humanizeDom(parser.parse('<div><tr></tr></div>', 'TestComp'))).toEqual([
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[html.Element, 'div', 0],
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[html.Element, 'tr', 1],
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]);
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});
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it('should support explicit namespace', () => {
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expect(humanizeDom(parser.parse('<myns:div></myns:div>', 'TestComp'))).toEqual([
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[html.Element, ':myns:div', 0]
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]);
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});
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it('should support implicit namespace', () => {
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expect(humanizeDom(parser.parse('<svg></svg>', 'TestComp'))).toEqual([
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[html.Element, ':svg:svg', 0]
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]);
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});
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it('should propagate the namespace', () => {
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expect(humanizeDom(parser.parse('<myns:div><p></p></myns:div>', 'TestComp'))).toEqual([
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[html.Element, ':myns:div', 0],
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[html.Element, ':myns:p', 1],
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]);
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});
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it('should match closing tags case sensitive', () => {
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const errors = parser.parse('<DiV><P></p></dIv>', 'TestComp').errors;
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expect(errors.length).toEqual(2);
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expect(humanizeErrors(errors)).toEqual([
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[
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'p',
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'Unexpected closing tag "p". It may happen when the tag has already been closed by another tag. For more info see https://www.w3.org/TR/html5/syntax.html#closing-elements-that-have-implied-end-tags',
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'0:8'
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],
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[
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'dIv',
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'Unexpected closing tag "dIv". It may happen when the tag has already been closed by another tag. For more info see https://www.w3.org/TR/html5/syntax.html#closing-elements-that-have-implied-end-tags',
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'0:12'
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],
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]);
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});
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it('should support self closing void elements', () => {
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expect(humanizeDom(parser.parse('<input />', 'TestComp'))).toEqual([
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[html.Element, 'input', 0]
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]);
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});
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it('should support self closing foreign elements', () => {
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expect(humanizeDom(parser.parse('<math />', 'TestComp'))).toEqual([
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[html.Element, ':math:math', 0]
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]);
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});
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it('should ignore LF immediately after textarea, pre and listing', () => {
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expect(humanizeDom(parser.parse(
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'<p>\n</p><textarea>\n</textarea><pre>\n\n</pre><listing>\n\n</listing>',
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'TestComp')))
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.toEqual([
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[html.Element, 'p', 0],
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[html.Text, '\n', 1],
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[html.Element, 'textarea', 0],
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[html.Element, 'pre', 0],
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[html.Text, '\n', 1],
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[html.Element, 'listing', 0],
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[html.Text, '\n', 1],
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]);
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});
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});
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describe('attributes', () => {
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it('should parse attributes on regular elements case sensitive', () => {
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expect(humanizeDom(parser.parse('<div kEy="v" key2=v2></div>', 'TestComp'))).toEqual([
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[html.Element, 'div', 0],
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[html.Attribute, 'kEy', 'v'],
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[html.Attribute, 'key2', 'v2'],
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]);
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});
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it('should parse attributes without values', () => {
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expect(humanizeDom(parser.parse('<div k></div>', 'TestComp'))).toEqual([
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[html.Element, 'div', 0],
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[html.Attribute, 'k', ''],
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]);
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});
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it('should parse attributes on svg elements case sensitive', () => {
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expect(humanizeDom(parser.parse('<svg viewBox="0"></svg>', 'TestComp'))).toEqual([
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[html.Element, ':svg:svg', 0],
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[html.Attribute, 'viewBox', '0'],
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]);
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});
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it('should parse attributes on <ng-template> elements', () => {
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expect(humanizeDom(parser.parse('<ng-template k="v"></ng-template>', 'TestComp')))
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.toEqual([
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[html.Element, 'ng-template', 0],
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[html.Attribute, 'k', 'v'],
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]);
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});
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it('should support namespace', () => {
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expect(humanizeDom(parser.parse('<svg:use xlink:href="Port" />', 'TestComp'))).toEqual([
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[html.Element, ':svg:use', 0],
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[html.Attribute, ':xlink:href', 'Port'],
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]);
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});
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});
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describe('comments', () => {
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it('should preserve comments', () => {
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expect(humanizeDom(parser.parse('<!-- comment --><div></div>', 'TestComp'))).toEqual([
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[html.Comment, 'comment', 0],
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[html.Element, 'div', 0],
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]);
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});
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});
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describe('expansion forms', () => {
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it('should parse out expansion forms', () => {
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const parsed = parser.parse(
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`<div>before{messages.length, plural, =0 {You have <b>no</b> messages} =1 {One {{message}}}}after</div>`,
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'TestComp', {tokenizeExpansionForms: true});
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expect(humanizeDom(parsed)).toEqual([
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[html.Element, 'div', 0],
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[html.Text, 'before', 1],
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[html.Expansion, 'messages.length', 'plural', 1],
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[html.ExpansionCase, '=0', 2],
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[html.ExpansionCase, '=1', 2],
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[html.Text, 'after', 1],
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]);
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const cases = (<any>parsed.rootNodes[0]).children[1].cases;
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expect(humanizeDom(new ParseTreeResult(cases[0].expression, []))).toEqual([
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[html.Text, 'You have ', 0],
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[html.Element, 'b', 0],
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[html.Text, 'no', 1],
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[html.Text, ' messages', 0],
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]);
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expect(humanizeDom(new ParseTreeResult(cases[1].expression, []))).toEqual([
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[html.Text, 'One {{message}}', 0]
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]);
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});
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it('should parse out expansion forms', () => {
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const parsed = parser.parse(
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`<div><span>{a, plural, =0 {b}}</span></div>`, 'TestComp',
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{tokenizeExpansionForms: true});
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expect(humanizeDom(parsed)).toEqual([
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[html.Element, 'div', 0],
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[html.Element, 'span', 1],
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[html.Expansion, 'a', 'plural', 2],
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[html.ExpansionCase, '=0', 3],
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]);
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});
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it('should parse out nested expansion forms', () => {
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const parsed = parser.parse(
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`{messages.length, plural, =0 { {p.gender, select, male {m}} }}`, 'TestComp',
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{tokenizeExpansionForms: true});
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expect(humanizeDom(parsed)).toEqual([
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[html.Expansion, 'messages.length', 'plural', 0],
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[html.ExpansionCase, '=0', 1],
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]);
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const firstCase = (<any>parsed.rootNodes[0]).cases[0];
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expect(humanizeDom(new ParseTreeResult(firstCase.expression, []))).toEqual([
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[html.Expansion, 'p.gender', 'select', 0],
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[html.ExpansionCase, 'male', 1],
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[html.Text, ' ', 0],
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]);
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});
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it('should error when expansion form is not closed', () => {
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const p = parser.parse(
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`{messages.length, plural, =0 {one}`, 'TestComp', {tokenizeExpansionForms: true});
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expect(humanizeErrors(p.errors)).toEqual([
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[null, 'Invalid ICU message. Missing \'}\'.', '0:34']
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]);
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});
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it('should support ICU expressions with cases that contain numbers', () => {
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const p = parser.parse(
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`{sex, select, male {m} female {f} 0 {other}}`, 'TestComp',
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{tokenizeExpansionForms: true});
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expect(p.errors.length).toEqual(0);
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});
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it(`should support ICU expressions with cases that contain any character except '}'`,
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() => {
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const p = parser.parse(
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`{a, select, b {foo} % bar {% bar}}`, 'TestComp', {tokenizeExpansionForms: true});
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expect(p.errors.length).toEqual(0);
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});
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it('should error when expansion case is not properly closed', () => {
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const p = parser.parse(
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`{a, select, b {foo} % { bar {% bar}}`, 'TestComp', {tokenizeExpansionForms: true});
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expect(humanizeErrors(p.errors)).toEqual([
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[
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6,
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'Unexpected character "EOF" (Do you have an unescaped "{" in your template? Use "{{ \'{\' }}") to escape it.)',
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'0:36'
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],
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[null, 'Invalid ICU message. Missing \'}\'.', '0:22']
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]);
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});
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it('should error when expansion case is not closed', () => {
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const p = parser.parse(
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`{messages.length, plural, =0 {one`, 'TestComp', {tokenizeExpansionForms: true});
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expect(humanizeErrors(p.errors)).toEqual([
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[null, 'Invalid ICU message. Missing \'}\'.', '0:29']
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]);
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});
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it('should error when invalid html in the case', () => {
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const p = parser.parse(
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`{messages.length, plural, =0 {<b/>}`, 'TestComp', {tokenizeExpansionForms: true});
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expect(humanizeErrors(p.errors)).toEqual([
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['b', 'Only void and foreign elements can be self closed "b"', '0:30']
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]);
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});
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});
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describe('source spans', () => {
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it('should store the location', () => {
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expect(humanizeDomSourceSpans(parser.parse(
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'<div [prop]="v1" (e)="do()" attr="v2" noValue>\na\n</div>', 'TestComp')))
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.toEqual([
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[html.Element, 'div', 0, '<div [prop]="v1" (e)="do()" attr="v2" noValue>'],
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[html.Attribute, '[prop]', 'v1', '[prop]="v1"'],
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[html.Attribute, '(e)', 'do()', '(e)="do()"'],
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[html.Attribute, 'attr', 'v2', 'attr="v2"'],
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[html.Attribute, 'noValue', '', 'noValue'],
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[html.Text, '\na\n', 1, '\na\n'],
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]);
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});
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it('should set the start and end source spans', () => {
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const node = <html.Element>parser.parse('<div>a</div>', 'TestComp').rootNodes[0];
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expect(node.startSourceSpan!.start.offset).toEqual(0);
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expect(node.startSourceSpan!.end.offset).toEqual(5);
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expect(node.endSourceSpan!.start.offset).toEqual(6);
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expect(node.endSourceSpan!.end.offset).toEqual(12);
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});
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it('should support expansion form', () => {
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expect(humanizeDomSourceSpans(parser.parse(
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'<div>{count, plural, =0 {msg}}</div>', 'TestComp',
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{tokenizeExpansionForms: true})))
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.toEqual([
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[html.Element, 'div', 0, '<div>'],
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[html.Expansion, 'count', 'plural', 1, '{count, plural, =0 {msg}}'],
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[html.ExpansionCase, '=0', 2, '=0 {msg}'],
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]);
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});
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it('should not report a value span for an attribute without a value', () => {
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const ast = parser.parse('<div bar></div>', 'TestComp');
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expect((ast.rootNodes[0] as html.Element).attrs[0].valueSpan).toBeUndefined();
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});
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it('should report a value span for an attribute with a value', () => {
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const ast = parser.parse('<div bar="12"></div>', 'TestComp');
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const attr = (ast.rootNodes[0] as html.Element).attrs[0];
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expect(attr.valueSpan!.start.offset).toEqual(10);
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expect(attr.valueSpan!.end.offset).toEqual(12);
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});
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it('should report a value span for an unquoted attribute value', () => {
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const ast = parser.parse('<div bar=12></div>', 'TestComp');
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const attr = (ast.rootNodes[0] as html.Element).attrs[0];
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expect(attr.valueSpan!.start.offset).toEqual(9);
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expect(attr.valueSpan!.end.offset).toEqual(11);
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});
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});
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describe('visitor', () => {
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it('should visit text nodes', () => {
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const result = humanizeDom(parser.parse('text', 'TestComp'));
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expect(result).toEqual([[html.Text, 'text', 0]]);
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});
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it('should visit element nodes', () => {
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const result = humanizeDom(parser.parse('<div></div>', 'TestComp'));
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expect(result).toEqual([[html.Element, 'div', 0]]);
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});
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it('should visit attribute nodes', () => {
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const result = humanizeDom(parser.parse('<div id="foo"></div>', 'TestComp'));
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expect(result).toContain([html.Attribute, 'id', 'foo']);
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});
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it('should visit all nodes', () => {
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const result =
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parser.parse('<div id="foo"><span id="bar">a</span><span>b</span></div>', 'TestComp');
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const accumulator: html.Node[] = [];
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const visitor = new class {
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visit(node: html.Node, context: any) {
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accumulator.push(node);
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}
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visitElement(element: html.Element, context: any): any {
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html.visitAll(this, element.attrs);
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html.visitAll(this, element.children);
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}
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visitAttribute(attribute: html.Attribute, context: any): any {}
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visitText(text: html.Text, context: any): any {}
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visitComment(comment: html.Comment, context: any): any {}
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visitExpansion(expansion: html.Expansion, context: any): any {
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html.visitAll(this, expansion.cases);
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}
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visitExpansionCase(expansionCase: html.ExpansionCase, context: any): any {}
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};
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html.visitAll(visitor, result.rootNodes);
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expect(accumulator.map(n => n.constructor)).toEqual([
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html.Element, html.Attribute, html.Element, html.Attribute, html.Text, html.Element,
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html.Text
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]);
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});
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it('should skip typed visit if visit() returns a truthy value', () => {
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const visitor = new class {
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visit(node: html.Node, context: any) {
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return true;
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}
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visitElement(element: html.Element, context: any): any {
|
|
throw Error('Unexpected');
|
|
}
|
|
visitAttribute(attribute: html.Attribute, context: any): any {
|
|
throw Error('Unexpected');
|
|
}
|
|
visitText(text: html.Text, context: any): any {
|
|
throw Error('Unexpected');
|
|
}
|
|
visitComment(comment: html.Comment, context: any): any {
|
|
throw Error('Unexpected');
|
|
}
|
|
visitExpansion(expansion: html.Expansion, context: any): any {
|
|
throw Error('Unexpected');
|
|
}
|
|
visitExpansionCase(expansionCase: html.ExpansionCase, context: any): any {
|
|
throw Error('Unexpected');
|
|
}
|
|
};
|
|
const result = parser.parse('<div id="foo"></div><div id="bar"></div>', 'TestComp');
|
|
const traversal = html.visitAll(visitor, result.rootNodes);
|
|
expect(traversal).toEqual([true, true]);
|
|
});
|
|
});
|
|
|
|
describe('errors', () => {
|
|
it('should report unexpected closing tags', () => {
|
|
const errors = parser.parse('<div></p></div>', 'TestComp').errors;
|
|
expect(errors.length).toEqual(1);
|
|
expect(humanizeErrors(errors)).toEqual([[
|
|
'p',
|
|
'Unexpected closing tag "p". It may happen when the tag has already been closed by another tag. For more info see https://www.w3.org/TR/html5/syntax.html#closing-elements-that-have-implied-end-tags',
|
|
'0:5'
|
|
]]);
|
|
});
|
|
|
|
it('should report subsequent open tags without proper close tag', () => {
|
|
const errors = parser.parse('<div</div>', 'TestComp').errors;
|
|
expect(errors.length).toEqual(1);
|
|
expect(humanizeErrors(errors)).toEqual([[
|
|
'div',
|
|
'Unexpected closing tag "div". It may happen when the tag has already been closed by another tag. For more info see https://www.w3.org/TR/html5/syntax.html#closing-elements-that-have-implied-end-tags',
|
|
'0:4'
|
|
]]);
|
|
});
|
|
|
|
it('should report closing tag for void elements', () => {
|
|
const errors = parser.parse('<input></input>', 'TestComp').errors;
|
|
expect(errors.length).toEqual(1);
|
|
expect(humanizeErrors(errors)).toEqual([
|
|
['input', 'Void elements do not have end tags "input"', '0:7']
|
|
]);
|
|
});
|
|
|
|
it('should report self closing html element', () => {
|
|
const errors = parser.parse('<p />', 'TestComp').errors;
|
|
expect(errors.length).toEqual(1);
|
|
expect(humanizeErrors(errors)).toEqual([
|
|
['p', 'Only void and foreign elements can be self closed "p"', '0:0']
|
|
]);
|
|
});
|
|
|
|
it('should report self closing custom element', () => {
|
|
const errors = parser.parse('<my-cmp />', 'TestComp').errors;
|
|
expect(errors.length).toEqual(1);
|
|
expect(humanizeErrors(errors)).toEqual([
|
|
['my-cmp', 'Only void and foreign elements can be self closed "my-cmp"', '0:0']
|
|
]);
|
|
});
|
|
|
|
it('should also report lexer errors', () => {
|
|
const errors = parser.parse('<!-err--><div></p></div>', 'TestComp').errors;
|
|
expect(errors.length).toEqual(2);
|
|
expect(humanizeErrors(errors)).toEqual([
|
|
[TokenType.COMMENT_START, 'Unexpected character "e"', '0:3'],
|
|
[
|
|
'p',
|
|
'Unexpected closing tag "p". It may happen when the tag has already been closed by another tag. For more info see https://www.w3.org/TR/html5/syntax.html#closing-elements-that-have-implied-end-tags',
|
|
'0:14'
|
|
]
|
|
]);
|
|
});
|
|
});
|
|
});
|
|
});
|
|
}
|
|
|
|
export function humanizeErrors(errors: ParseError[]): any[] {
|
|
return errors.map(e => {
|
|
if (e instanceof TreeError) {
|
|
// Parser errors
|
|
return [<any>e.elementName, e.msg, humanizeLineColumn(e.span.start)];
|
|
}
|
|
// Tokenizer errors
|
|
return [(<any>e).tokenType, e.msg, humanizeLineColumn(e.span.start)];
|
|
});
|
|
}
|