qa_restore-names/src/restoreNames.test.js at bffd505b579e672f8ed4858e439be3e5b8d99637 · mate-academy/qa_restore-names · GitHub

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'use strict';

describe('restoreNames', () => {
  const { restoreNames } = require('./restoreNames');

  it('should update firstname field', () => {
    const users = [
      {
        firstName: undefined,
        lastName: 'Holy',
        fullName: 'Jack Holy',
      },
    ];

    restoreNames(users);

    expect(users).toEqual([
      {
        firstName: 'Jack',
        lastName: 'Holy',
        fullName: 'Jack Holy',
      },
    ]);
  });

  it('should add firstname field if not exist', () => {
    const users = [
      {
        lastName: 'Adams',
        fullName: 'Mike Adams',
      },
    ];

    restoreNames(users);

    expect(users).toEqual([
      {
        firstName: 'Mike',
        lastName: 'Adams',
        fullName: 'Mike Adams',
      },
    ]);
  });

  it('should return {} if users.length = 0', () => {
    const users = [];

    restoreNames(users);

    expect(users).toEqual([]);
  });

  it(`should return initial result if firstname isn't empty`, () => {
    const users = [
      {
        firstName: 'Mike',
        lastName: 'Adams',
      },
    ];

    restoreNames(users);

    expect(users).toEqual([
      {
        firstName: 'Mike',
        lastName: 'Adams',
      },
    ]);
  });
});