@angular-redux/store/src/utils/set-in.spec.ts

Angular 2 bindings for Redux

import { setIn } from './set-in';

describe('setIn', () => {
  it('performs a shallow set correctly without mutation', () => {
    const original = { a: 1 };
    expect(setIn(original, ['b'], 2)).toEqual({ a: 1, b: 2});
    expect(original).toEqual({ a: 1});
  });

  it('performs a deeply nested set correctly without mutation', () => {
    const original = { a: 1 };
    const expected =  {
      a: 1,
      b: {
        c: {
          d: 2,
        },
      },
    };

    expect(setIn(original, ['b', 'c', 'd'], 2)).toEqual(expected);
    expect(original).toEqual({ a: 1});
  });

  it ('performs a deeply nested set with existing keys without mutation', () => {
    const original = {
      a: 1,
      b: {
        wat: 3,
      }};
    const expected = {
      a: 1,
      b: {
        wat: 3,
        c: {
          d: 2,
        },
      },
    };

    expect(setIn(original, ['b', 'c', 'd'], 2)).toEqual(expected);
    expect(original).toEqual({ a: 1, b: { wat: 3, } });
  });
});