map-operations.js

import {
  isTimeElapsedBeforeEndTime,
  getDateTimeElapsedSincePageLoaded,
  getDurationBetweenTimes,
} from '@/utils/date';

class myMap extends Map {
	deleteByValue(valueToRemove) {
  	console.log('delete', this, valueToRemove)
		this.forEach((value, key) => {
      if (value === valueToRemove) this.delete(key);
    });
  }
}

let mapper = new myMap();

const signer1 = { signer: 'Valter' };
const signer2 = { signer: 'Maris' };
const signer3 = { signer: 'C3PO' };

const signature1 = { color: 'red' }
const signature2 = { color: 'yellow' }

const deleteIt = (signature) => {
  mapper.forEach((value, key) => {
    if (value === signature) mapper.delete(key);
  });
}

describe('MapTests', () => {
  it('should remove based on value instead of key', () => {
    mapper.set(signer1, signature1);
    mapper.set(signer1, signature2);
    mapper.set(signer3, signature1);

    // deleteIt(signature2);
    mapper.deleteByValue(signature2);

    expect([...mapper.entries()]).toMatchObject([
      [
          {
              "signer": "C3PO"
          },
          {
              "color": "red"
          }
      ]
    ]);
  });

  it('should remove based on key', () => {
    mapper.set(signer1, signature1);
    mapper.set(signer1, signature2);
    mapper.set(signer3, signature1);

    mapper.delete(signer1);

    expect([...mapper.entries()]).toMatchObject([
      [
          {
              "signer": "C3PO"
          },
          {
              "color": "red"
          }
      ]
    ]);
  })
});