const spawnSpy = jest.spyOn(childProcess, 'spawn');

[tdimnet]

Hello there,

I'm using Next Commander for a project and I'm trying to add some tests. The doc contains some snippets but I don't understand something:

describe('Task Command', () => {
  let commandInstance: TestingModule;

  beforeAll(async () => {
    commandInstance = await CommandTestFactory.createTestingCommand({
      imports: [AppModule]
    }).compile();
  });

  it('should call the "run" method', async () => {
    CommandTestFactory.setAnswers(['echo Hello World!']);
    const spawnSpy = jest.spyOn(childProcess, 'spawn');
    await CommandTestFactory.run(commandInstance, ['run']);
    expect(spawnSpy).toBeCalledWith([
      'echo Hello World!',
      { shell: os.userInfo().shell }
    ]);
  });
});

childProcess is never initialized and comes from nowhere.

How should I use it?

Thank for your time.

[jmcdo29]

import * as childProcess from 'child-process' like it was shown earlier in the docs. Well, the docs show import { spawn } from 'child-process' but I thought it could be interpreted that import * as childProcess from 'child-process' would be the correct import

[amin3mej]

Here is the updated link to the documentation you mentioned.