@bigtest/mirage/tests/integration/orm/belongs-to/6-one-way-reflexive/association-set-id-test.js

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import Helper, { states } from './_helper';
import { module, test } from 'qunit';

module('Integration | ORM | Belongs To | One-Way Reflexive | association #setId', {
  beforeEach() {
    this.helper = new Helper();
  }
});

/*
  The model can update its association via parentId, for all states
*/
states.forEach((state) => {
  test(`a ${state} can update its association to a saved parent via parentId`, function(assert) {
    let [ child ] = this.helper[state]();
    let savedParent = this.helper.savedParent();

    child.userId = savedParent.id;

    assert.equal(child.userId, savedParent.id);
    assert.deepEqual(child.user.attrs, savedParent.attrs);
  });
});

[
  'savedChildSavedParent',
  'newChildSavedParent'
].forEach((state) => {
  test(`a ${state} can clear its association via a null parentId`, function(assert) {
    let [ child ] = this.helper[state]();

    child.userId = null;

    assert.equal(child.userId, null);
    assert.deepEqual(child.user, null);
  });
});