@interaktiv/dia-scripts/dist/scripts/deploy/runCssCompile.test.js

CLI toolbox with common scripts for most sort of projects at DIA

"use strict";

jest.mock('node-sass', () => ({
  render: jest.fn()
}));
jest.mock('fs');
const originalExit = process.exit;
const originalArgv = process.argv;
describe('runCssCompile', () => {
  beforeEach(() => {
    process.exit = jest.fn();
  });
  afterEach(() => {
    process.exit = originalExit;
    process.argv = originalArgv;
    jest.resetModules();
    jest.restoreAllMocks();
  });
  it('should return css file path on success', async () => {
    const {
      render
    } = require('node-sass');

    const fs = require('fs');

    render.mockImplementationOnce((config, callback) => callback(null, {}));
    fs.writeFile.mockImplementationOnce((filename, data, callback) => callback(null));

    const runCssCompile = require('./runCssCompile');

    const result = await runCssCompile({
      file: '/blah/root/styles.scss'
    });
    expect(result).toBe('/blah/root/styles.css');
  });
  it('should throw custom error if something went wrong but not error is thrown by the compiler', async () => {
    const {
      render
    } = require('node-sass');

    const fs = require('fs');

    render.mockImplementationOnce((config, callback) => callback(null, null));
    fs.writeFile.mockImplementationOnce((filename, data, callback) => callback(null));

    const runCssCompile = require('./runCssCompile');

    await expect(runCssCompile({
      file: '/blah/root/styles.scss'
    })).rejects.toThrow(/Compiler returned null result/i);
  });
  it('should throw if a compiler error occurs', async () => {
    const {
      render
    } = require('node-sass');

    const errorMessage = 'Oh shit, something went wrong with the compiler'; // eslint-disable-next-line promise/prefer-await-to-callbacks

    render.mockImplementationOnce((config, callback) => // eslint-disable-next-line promise/prefer-await-to-callbacks
    callback(new Error(errorMessage)));

    const runCssCompile = require('./runCssCompile');

    await expect(runCssCompile({
      file: '/blah/root/styles.scss'
    })).rejects.toThrow(errorMessage);
  });
  it('should throw if a write error occurs', async () => {
    const {
      render
    } = require('node-sass');

    const fs = require('fs');

    render.mockImplementationOnce((config, callback) => callback(null, {}));
    const errorMessage = 'Oh shit, something went wrong on file write';
    fs.writeFile.mockImplementation((filename, data, callback) => callback(new Error(errorMessage)));

    const runCssCompile = require('./runCssCompile');

    expect.assertions(1);
    await expect(runCssCompile({
      file: '/blah/root/styles.scss'
    })).rejects.toThrow(errorMessage);
  });
});