@breautek/merge-change/test/utils.to-plain.spec.js

Simple library for deep merge of objects and other types (also for patch and immutable updates). Declarative operations to specific merge, for example to remove properties. Customize merging between specific types. Calculating diffs.

const utils = require('../index.js').utils;

describe('Test plain()', () => {

  test('Number', () => {
    const value = utils.plain(10);
    expect(value).toBe(10);
  });

  test('Array with system types', () => {
    const value = utils.plain([10, 'string', true, null, undefined, new Date('2021-01-07T19:10:21.759Z'), /^[a-z]/u]);
    expect(value).toEqual([10, 'string', true, null, undefined, '2021-01-07T19:10:21.759Z', /^[a-z]/u]);
  });

  test('Custom class', () => {
    class A {
      constructor() {
        this.x = 10;
        this.y = 20
      }
    }
    const obj = {
      prop1: {
        prop2: {
          prop3: {
            v: new A()
          },
        }
      }
    }
    const value = utils.plain(obj);
    expect(value).toEqual({
      prop1: {
        prop2: {
          prop3: {
            v: {
              x: 10,
              y: 20
            }
          },
        }
      }
    });
  });

  test('Custom class with custom toJSON', () => {
    class A {
      constructor() {
        this.x = 10;
        this.y = 20
      }
      toJSON(){
        return this.x;
      }
    }
    const obj = {
      prop1: {
        prop2: {
          prop3: {
            v: new A()
          },
        }
      }
    }
    const value = utils.plain(obj);
    expect(value).toEqual({
      prop1: {
        prop2: {
          prop3: {
            v: 10
          },
        }
      }
    });
  });

  test('simple', ()=> {
    const plain = utils.plain({
      date: new Date('2021-01-07T19:10:21.759Z'),
      prop: {
        _id: '6010a8c75b9b393070e42e68'//new ObjectID('6010a8c75b9b393070e42e68')
      }
    });
    expect(plain).toEqual({
      date: '2021-01-07T19:10:21.759Z',
      prop: {
        _id: '6010a8c75b9b393070e42e68'
      }
    });
  })
});