@bscotch/gml-parser/dist/lexer.test.js

A parser for GML (GameMaker Language) files for programmatic manipulation and analysis of GameMaker projects.

import { undent } from '@bscotch/utility';
import fs from 'fs/promises';
import { GmlLexer } from './lexer.js';
import { logger } from './logger.js';
describe('Lexer', function () {
    it('can lex strings', function () {
        const sample = undent `
      "hello"
      @"world"
      @'singlez'
      @"multi
      line
      one!"
    `;
        const result = GmlLexer.tokenize(sample);
        if (result.errors.length) {
            logger.dir(result, { depth: null });
            throw new Error('Lexer failed to lex sample file: ' + sample);
        }
    });
    it('can lex templates', function () {
        const sample = '$"a template {woo+3}!"';
        const result = GmlLexer.tokenize(sample);
        if (result.errors.length) {
            logger.dir(result, { depth: null });
            throw new Error('Lexer failed to lex sample: ' + sample);
        }
    });
    it('can lex GML style JSDocs', function () {
        const sample = undent `
      /// @description This is a description
      /// @param {string} a
      /// @param {number} b
      /// @returns {string}
      function myFunc(a, b) {}
    `;
        const result = GmlLexer.tokenize(sample);
        if (result.errors.length) {
            logger.dir(result, { depth: null });
            throw new Error('Lexer failed to lex sample: ' + sample);
        }
    });
    it('can lex JS style JSDocs', function () {
        const sample = undent `
      /**
       * @description This is a description
       * @param {string} a
       * @param {number} b
       * @returns {string}
       */
      function myFunc(a, b) {}
    `;
        const result = GmlLexer.tokenize(sample);
        if (result.errors.length) {
            logger.dir(result.errors, { depth: null });
            throw new Error('Lexer failed to lex sample: ' + sample);
        }
    });
    it('can lex sample files', async function () {
        const samples = await fs.readdir('./samples');
        for (const sample of samples) {
            const filePath = `./samples/${sample}`;
            if (await fs.stat(filePath).then((s) => s.isDirectory())) {
                continue;
            }
            const code = await fs.readFile(filePath, 'utf-8');
            const result = GmlLexer.tokenize(code);
            if (result.errors.length) {
                logger.dir(result, { depth: null });
                throw new Error('Lexer failed to lex sample file: ' + filePath);
            }
        }
    });
});
function logResult(result) {
    logger.log(JSON.stringify(result.tokens, ['image', 'startOffset', 'tokenType', 'name', 'PUSH_MODE', 'POP_MODE'], 2));
}
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