@esmj/size/src/__tests__/createResultSpec.mjs

JavaScript Package Size Cost like bundlephobia or import-cost

import { jest } from '@jest/globals';

jest.mock('fs-extra', () => {
  return {
    readFile: () => {
      return 'abcdefghijklmnopqrstuvwxyz'.repeat(1000);
    },
  };
});

let module;

beforeAll(async () => {
  module = await import('../createResult.mjs');
});

describe('createResult', () => {
  it('should generate result object', async () => {
    const result = await module.createBundleResult({ TMP: 'folder' });

    expect(result).toMatchInlineSnapshot(`
      {
        "bundle": {
          "brotli": {
            "size": 33,
            "speed": {
              "2g": 2.75,
              "3g": 0.66,
              "4g": 0.037714285714285714,
              "5g": 0.014666666666666666,
            },
          },
          "gzip": {
            "size": 122,
            "speed": {
              "2g": 10.166666666666666,
              "3g": 2.44,
              "4g": 0.13942857142857143,
              "5g": 0.05422222222222222,
            },
          },
          "minify": {
            "size": 26000,
            "speed": {
              "2g": 2166.6666666666665,
              "3g": 520,
              "4g": 29.714285714285715,
              "5g": 11.555555555555555,
            },
          },
        },
      }
    `);
  });
});