qa_restore-names/src/restoreNames.test.js at 1cb376998094d1fb602c942481b880d8712f81b6 · mate-academy/qa_restore-names · GitHub

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'use strict';
/* eslint-disable max-len */

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

  it(`should be declared`, () => {
    expect(restoreNames).toBeInstanceOf(Function);
  });

  it(`should set correct firstName to users who do not have it`, () => {
    const users = [
      {
        lastName: 'Holy',
        fullName: 'Jack Holy',
      },
      {
        lastName: 'Adams',
        fullName: 'Mike Adams',
      },
    ];

    restoreNames(users);

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

  it(`should not change anything if user already has a firstName`, () => {
    const users = [
      {
        firstName: 'Jack',
        lastName: 'Holy',
        fullName: 'Jack Holy',
      },
      {
        firstName: 'Mike',
        lastName: 'Adams',
        fullName: 'Mike Adams',
      },
    ];

    restoreNames(users);

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

  it(`should set correct firstName to users who's firstName is equal to undefined`, () => {
    const users = [
      {
        firstName: undefined,
        lastName: 'Holy',
        fullName: 'Jack Holy',
      },
      {
        lastName: 'Adams',
        fullName: 'Mike Adams',
      },
      {
        firstName: undefined,
        lastName: 'Smith',
        fullName: 'Bob Smith',
      },
    ];

    restoreNames(users);

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