compiler-explorer/test/ansi-to-html-tests.ts

// Copyright (c) 2021, Compiler Explorer Authors
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import {describe, expect, it} from 'vitest';

import {Filter} from '../static/ansi-to-html.js';

describe('ansi-to-html', () => {
    const filterOpts = {
        fg: '#333333',
        bg: '#f5f5f5',
        stream: true,
        escapeXML: true,
    };
    it('Should leave non-ansi colours alone', () => {
        const filter = new Filter(filterOpts);
        expect(filter.toHtml('I am a boring old string')).toEqual('I am a boring old string');
    });
    it('Should handle simple cases', () => {
        const filter = new Filter(filterOpts);
        expect(filter.toHtml('\x1B[38;5;99mTest')).toEqual('<span style="color:#875fff">Test</span>');
    });
    it('Should handle nasty edge cases', () => {
        const filter = new Filter(filterOpts);
        // See #1666, this used to cause catastrophic backtracking.
        expect(
            filter.toHtml(
                '\x1B[38;5;9999999999999999999999999999999999999999999999999999999999999999999999999999999' +
                    '99999999999999999999"mTest',
            ),
        ).toEqual(
            '5;9999999999999999999999999999999999999999999999999999999999999' +
                '99999999999999999999999999999999999999"mTest',
        );
    });

    // With thanks to https://github.com/rburns/ansi-to-html/pull/84/files
    it('renders xterm foreground 256 sequences', () => {
        const filter = new Filter(filterOpts);
        expect(filter.toHtml('\x1B[38;5;196mhello')).toEqual('<span style="color:#ff0000">hello</span>');
    });
    it('renders xterm background 256 sequences', () => {
        const filter = new Filter(filterOpts);
        expect(filter.toHtml('\x1B[48;5;196mhello')).toEqual('<span style="background-color:#ff0000">hello</span>');
    });

    it('should ignore reverse video', () => {
        const filter = new Filter(filterOpts);
        expect(filter.toHtml('\x1B[7mhello')).toEqual('hello');
    });

    // tests for #3659
    it('should stream', () => {
        const filter = new Filter(filterOpts);
        filter.toHtml('\x1B[38;5;99mfoo');
        expect(filter.toHtml('bar')).toEqual('<span style="color:#875fff">bar</span>');
    });
    it('should handle stream reset', () => {
        const filter = new Filter(filterOpts);
        filter.toHtml('\x1B[38;5;99mfoo');
        filter.reset();
        expect(filter.toHtml('bar')).toEqual('bar');
    });

    // rgb test
    it('should process rgb colors', () => {
        const filter = new Filter(filterOpts);
        expect(filter.toHtml('\x1B[38;2;57;170;243mfoo\x1B[48;2;100;100;100mbar')).toEqual(
            '<span style="color:#39aaf3">foo<span style="background-color:#646464">bar</span></span>',
        );
    });
});