xref: /expo/packages/@expo/cli/e2e/__tests__/export/without-sourcemaps.test.ts (revision 46f023fa)

/* eslint-env jest */
import execa from 'execa';
import fs from 'fs-extra';
import klawSync from 'klaw-sync';
import path from 'path';

import { runExportSideEffects } from './export-side-effects';
import { bin, getRouterE2ERoot } from '../utils';

runExportSideEffects();

describe('exports static without sourcemaps', () => {
  const projectRoot = getRouterE2ERoot();
  const outputName = 'dist-static-rendering-no-map';
  const outputDir = path.join(projectRoot, outputName);

  beforeAll(
    async () => {
      await execa('node', [bin, 'export', '-p', 'web', '--output-dir', outputName], {
        cwd: projectRoot,
        env: {
          NODE_ENV: 'production',
          EXPO_USE_STATIC: 'static',
          E2E_ROUTER_SRC: 'url-polyfill',
          E2E_ROUTER_ASYNC: 'development',
        },
      });
    },
    // Could take 45s depending on how fast the bundler resolves
    560 * 1000
  );

  it('has no reference to source maps', async () => {
    // List output files with sizes for snapshotting.
    // This is to make sure that any changes to the output are intentional.
    // Posix path formatting is used to make paths the same across OSes.
    const files = klawSync(outputDir)
      .map((entry) => {
        if (entry.path.includes('node_modules') || !entry.stats.isFile()) {
          return null;
        }
        return path.posix.relative(outputDir, entry.path);
      })
      .filter(Boolean);

    // No map files should exist
    expect(files.some((file) => file?.endsWith('.map'))).toBe(false);

    const jsFiles = files.filter((file) => file?.endsWith('.js'));

    for (const file of jsFiles) {
      // Ensure the bundle does not contain a source map reference
      const jsBundle = fs.readFileSync(path.join(outputDir, file!), 'utf8');
      expect(jsBundle).not.toMatch('//# sourceMappingURL');
      expect(jsBundle).not.toMatch('//# sourceURL');
    }
  });
});