als-require/tests/plugins.test.js

A utility for using CommonJS require in the browser and creating bundles.

const { describe, it, afterEach } = require('node:test');
const assert = require('node:assert');
const Require = require('../index');

describe('Require class plugins tests', () => {
   it('should modify module content using a single plugin', () => {
      const plugin = (mod) => {
         // Плагин заменяет слово 'original' на 'modified'
         mod.content = mod.content.replace(/original/g, 'modified');
      };

      const mod = new Require('./modules/pluginTest', { plugins: [plugin] });
      const fn = mod.fn();
      const result = fn();
      assert.strictEqual(result, 'This is a modified content.', 'Content should be modified by the plugin');
   });

   it('should apply multiple plugins sequentially', () => {
      const plugin1 = (mod) => {
         // Плагин заменяет 'original' на 'temp'
         mod.content = mod.content.replace(/original/g, 'temp');
      };

      const plugin2 = (mod) => {
         // Плагин заменяет 'temp' на 'final'
         mod.content = mod.content.replace(/temp/g, 'final');
      };

      const mod = new Require('./modules/pluginTest', { plugins: [plugin1, plugin2] });
      const fn = mod.fn();
      const result = fn();
      assert.strictEqual(result, 'This is a final content.', 'Content should be modified by both plugins sequentially');
   });

   it('should not break if a plugin does not modify the content', () => {
      const plugin = (module) => {
         // Пустой плагин, ничего не меняет
      };

      const mod = new Require('./modules/pluginTest', { plugins: [plugin] });
      const fn = mod.fn();
      const result = fn();

      assert.strictEqual(result, 'This is a original content.', 'Content should remain unchanged');
   });

   it('should handle plugins that throw errors gracefully', () => {
      const plugin = (module) => {
         // Плагин выбрасывает ошибку
         throw new Error('Plugin error');
      };

      try {
         const mod = new Require('./modules/pluginTest', { plugins: [plugin] });
         mod.fn();
         assert.fail('Should have thrown an error');
      } catch (error) {
         assert.strictEqual(error.message, 'Plugin error', 'Error message should match the plugin error');
      }
   });
});