The reorder test helper does not work correctly when a direction is explicitly set

[andreisebastianc-ccc]

Describe the bug
The reorder test helper does not work correctly when a direction is explicitly set.

To Reproduce
Steps to reproduce the behavior:

1. Use {{sortable-group groupName="closableTabs" direction='x' onChange=@onReorder}} on a List Element2.
2. Use the reorder helper in the test file

Expected behavior
The new order of the items in the list is the one provided to the reorder helper.

Additional context

The Template File

<ol
  data-test-closable-tabs
  {{sortable-group groupName="closableTabs" direction='x' onChange=@onReorder}}
>
  {{#each @views as |exploration|}}
    <li
      {{sortable-item model=exploration groupName="closableTabs"}}
      data-test-tabs
      data-test-id="{{exploration.id}}"
    >
...

Inside the test logic

import { reorder } from 'ember-sortable/test-support/helpers';

...

    await reorder(
      'mouse',
      '[data-test-tabs]',
      `[data-test-id="${explorations[1].explorationId}"]`,
      `[data-test-id="${explorations[0].explorationId}"]`,
      `[data-test-id="${explorations[3].explorationId}"]`,
      `[data-test-id="${explorations[2].explorationId}"]`
    );

Workaround

  get direction() {
    if (ENV.environment === 'test') {
      return;
    }
    return 'x';
  }

+ {{sortable-group groupName="closableTabs" direction=this.direction onChange=@onReorder}}
- {{sortable-group groupName="closableTabs" direction='x' onChange=@onReorder}}