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tokenizer-location-info.test.ts
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tokenizer-location-info.test.ts
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import * as assert from 'node:assert';
import { Tokenizer, TokenizerMode, TokenHandler } from './index.js';
import { Location, EOFToken, CharacterToken, DoctypeToken, TagToken, CommentToken } from '../common/token.js';
import { getSubstringByLineCol, normalizeNewLine } from 'parse5-test-utils/utils/common.js';
interface LocationInfoTestCase {
initialMode: typeof TokenizerMode[keyof typeof TokenizerMode];
lastStartTagName: string;
htmlChunks: string[];
}
/** Receives events and immediately compares them against the expected values. */
class LocationInfoHandler implements TokenHandler {
public sawEof = false;
/** The index of the last html chunk. */
private idx = 0;
/** All of the lines in the input. */
private lines: string[];
constructor(private testCase: LocationInfoTestCase, private html: string) {
this.lines = html.split(/\r?\n/g);
}
private validateLocation(location: Location | null): void {
assert.ok(location);
//Offsets
const actual = this.html.substring(location.startOffset, location.endOffset);
const chunk = this.testCase.htmlChunks[this.idx];
assert.strictEqual(actual, chunk);
//Line/col
const line = getSubstringByLineCol(this.lines, location);
const expected = normalizeNewLine(chunk);
assert.strictEqual(line, expected);
this.idx += 1;
}
onComment({ location }: CommentToken): void {
this.validateLocation(location);
}
onDoctype({ location }: DoctypeToken): void {
this.validateLocation(location);
}
onStartTag({ location }: TagToken): void {
this.validateLocation(location);
}
onEndTag({ location }: TagToken): void {
this.validateLocation(location);
}
onCharacter({ location }: CharacterToken): void {
this.validateLocation(location);
}
onNullCharacter({ location }: CharacterToken): void {
this.validateLocation(location);
}
onWhitespaceCharacter({ location }: CharacterToken): void {
this.validateLocation(location);
}
onEof({ location }: EOFToken): void {
assert.ok(location);
assert.strictEqual(location.endOffset, location.startOffset);
assert.strictEqual(location.endOffset, this.html.length);
assert.strictEqual(this.idx, this.testCase.htmlChunks.length);
this.sawEof = true;
}
}
it('Location Info (Tokenizer)', () => {
const testCases = [
{
initialMode: TokenizerMode.DATA,
lastStartTagName: '',
htmlChunks: [
'\r\n',
'<!DOCTYPE html>',
'\n',
'<!-- Test -->',
'\n',
'<head>',
'\n ',
'<meta charset="utf-8">',
'<title>',
' ',
'node.js',
'\u0000',
'</title>',
'\n',
'</head>',
'\n',
'<body id="front">',
'\n',
'<div id="intro">',
'\n ',
'<p\n>',
'\n ',
'Node.js',
' ',
'is',
' ',
'a',
'\n ',
'platform',
' ',
'built',
' ',
'on',
'\n ',
'<a href="http://code.google.com/p/v8/">',
'\n ',
"Chrome's",
' ',
'JavaScript',
' ',
'runtime',
'\n ',
'</a>',
'\n',
'</div>',
'</body>',
],
},
{
initialMode: TokenizerMode.RCDATA,
lastStartTagName: 'title',
htmlChunks: ['<div>Test', ' \n ', 'hey', ' ', 'ya!', '</title>', '<!--Yo-->'],
},
{
initialMode: TokenizerMode.RAWTEXT,
lastStartTagName: 'style',
htmlChunks: ['.header{', ' \n ', 'color:red;', '\n', '}', '</style>', 'Some', ' ', 'text'],
},
{
initialMode: TokenizerMode.SCRIPT_DATA,
lastStartTagName: 'script',
htmlChunks: ['var', ' ', 'a=c', ' ', '-', ' ', 'd;', '\n', 'a<--d;', '</script>', '<div>'],
},
{
initialMode: TokenizerMode.PLAINTEXT,
lastStartTagName: 'plaintext',
htmlChunks: ['Text', ' \n', 'Test</plaintext><div>'],
},
{
initialMode: TokenizerMode.DATA,
lastStartTagName: '',
htmlChunks: [
'\n',
'<!-- regular comment -->',
'<! bogus comment >',
'<? another bogus comment >',
'</!yet another bogus comment>',
'<![CDATA[ cdata as a bogus comment >',
],
},
{
initialMode: TokenizerMode.DATA,
lastStartTagName: '',
inForeignNode: true,
htmlChunks: ['<a>', '<![CDATA[ ', 'CDATA', ' ]]>', '<test>', ' <![CDATA[ ]]>\n'],
},
];
for (const testCase of testCases) {
const html = testCase.htmlChunks.join('');
const handler = new LocationInfoHandler(testCase, html);
const tokenizer = new Tokenizer({ sourceCodeLocationInfo: true }, handler);
const lastChunkIdx = testCase.htmlChunks.length - 1;
for (let i = 0; i < testCase.htmlChunks.length; i++) {
tokenizer.write(testCase.htmlChunks[i], i === lastChunkIdx);
}
// NOTE: set small waterline for testing purposes
tokenizer.preprocessor.bufferWaterline = 8;
tokenizer.state = testCase.initialMode;
tokenizer.lastStartTagName = testCase.lastStartTagName;
tokenizer.inForeignNode = !!testCase.inForeignNode;
while (!handler.sawEof) {
tokenizer.getNextToken();
}
}
});