immutablepatch/tests/primitiveTypePatch.test.js

Apply RFC 6902 style patches to Immutable.JS data structures

'use strict';

var Immutable = require('immutable');
var assert = require('assert');
var patch = require('../src/patch');

describe('primitive types patch', function() {
  it('returns same value when ops are empty', function () {
    var value = 1;
    var result = patch(value, Immutable.fromJS([]));

    assert.equal(result, value);
  });

  it('replaces numbers', function () {
    var value = 1;
    var newValue = 10;
    var result = patch(value, Immutable.fromJS([
      {op: 'replace', path: '/', value: newValue}
    ]));

    assert.equal(result, newValue);
  });

  it('replaces strings', function () {
    var value = '1';
    var newValue = '10';
    var result = patch(value, Immutable.fromJS([
      {op: 'replace', path: '/', value: newValue}
    ]));

    assert.equal(result, newValue);
  });

  it('replaces arrays', function () {
    var value = [1];
    var newValue = [10];
    var result = patch(value, Immutable.List([
      Immutable.Map({op: 'replace', path: '/', value: newValue})
    ]));

    assert.deepEqual(result, newValue);
  });

  it('replaces objects', function () {
    var value = {a: 1};
    var newValue = {b: 2};
    var result = patch(value, Immutable.List([
      Immutable.Map({op: 'replace', path: '/', value: newValue})
    ]));

    assert.deepEqual(result, newValue);
  });

  it('when op is remove returns null', function () {
    var value = {a: 1};
    var result = patch(value, Immutable.List([
      Immutable.Map({op: 'remove', path: '/'})
    ]));

    assert.equal(result, null);
  });
});