code-tree-cli/cli.test.js

Code Tree CLI

// Import.
import fs from 'fs';
import { buildIgnoreFilter, getAllFiles, askYesNo } from './cli';
import { jest } from '@jest/globals';

/**
 * Check if the function buildIgnoreFilter returns an ignore filter.
 */
describe('buildIgnoreFilter', () => {
  it('returns an ignore filter', async () => {
    jest.spyOn(fs, 'existsSync').mockReturnValue(false);
    const filter = await buildIgnoreFilter('.');
    expect(typeof filter.ignores).toBe('function');
    fs.existsSync.mockRestore();
  });
});

/**
 * Check if the function getAllFiles returns an array of file paths.
 */
describe('getAllFiles', () => {
  it('returns an array of file paths', async () => {
    const filter = { ignores: jest.fn().mockReturnValue(false) };
    const files = await getAllFiles(process.cwd(), filter, '**/*');
    expect(Array.isArray(files)).toBe(true);
  });
});

/**
 * Check if the function askYesNo resolves to true when user inputs y.
 */
describe('askYesNo', () => {
  it('resolves to true when user inputs y', async () => {
    const mockQuestion = jest.spyOn(process.stdin, 'once').mockImplementation((event, cb) => {
      if (event === 'data') cb('y\n');
    });
    const answer = askYesNo('Test question?');
    process.stdin.emit('data', 'y\n');
    expect(await answer).toBe(true);
    mockQuestion.mockRestore();
  });
});