debundle/src/writeToDisk.spec.js


const assert = require('assert');
const fs = require('fs');
const path = require('path');
const mock = require('mock-fs');

const writeToDisk = require('./writeToDisk');
const {generateFunction, generateRequire, generateProgram} = require('./testHelpers');

describe('mock filesystem container', () => {
  beforeEach(() => {
    mock({
      'dist/': {},
    });
  });

  afterEach(() => {
    mock.restore();
  });

  it('should write files to the filesystem', () => {
    const files = [
      {filePath: 'dist/foo', code: generateProgram({type: 'Literal', raw: '1', value: 1})},
      {filePath: 'dist/bar', code: generateProgram({type: 'Literal', raw: '2', value: 2})},
      {filePath: 'dist/index', code: generateProgram({type: 'Literal', raw: '3', value: 3})},
    ];

    return writeToDisk(files).then(() => {
      files.forEach(file => {
        let contents = fs.readFileSync(`${file.filePath}.js`).toString();
        assert.equal(contents, file.code.body[0].raw);
      });
    });
  });

  it('should write files to the filesystem and make nested directories', () => {
    const files = [
      {filePath: 'dist/foo/bar', code: generateProgram({type: 'Literal', raw: '1', value: 1})},
      {filePath: 'dist/foo/baz', code: generateProgram({type: 'Literal', raw: '2', value: 2})},
      {filePath: 'dist/index', code: generateProgram({type: 'Literal', raw: '3', value: 3})},
    ];

    return writeToDisk(files).then(() => {
      files.forEach(file => {
        // Make sure directory was created
        let pathExists = fs.existsSync(path.dirname(file.filePath));
        assert(pathExists);
        // And make sure the file looks good.
        let contents = fs.readFileSync(`${file.filePath}.js`).toString();
        assert.equal(contents, file.code.body[0].raw);
      });
    });
  });
});