<commit_before># Problem testing a route with a loading state

I have taken ember app kit and modified `routes/index.js` so that the model hook returns a promise, that resolves after 100ms:

```javascript
export default Ember.Route.extend({
  model: function() {
    return new Ember.RSVP.Promise(function(resolve, reject) {

      setTimeout(function(){
        resolve(['red', 'yellow', 'blue']);
      }, 100);
    });
  }
});
```
This causes the tests to hang on the index acceptance test.<commit_msg>Tweak readme<commit_after>## Problem testing a route with a loading state

This repository (probably) recreates a problem I've run into testing a route that passes through the loading sub-route, before completing its transition.

I have taken ember app kit and modified `routes/index.js` so that the model hook returns a promise, that resolves after 100ms:

```javascript
export default Ember.Route.extend({
  model: function() {
    return new Ember.RSVP.Promise(function(resolve, reject) {

      setTimeout(function(){
        resolve(['red', 'yellow', 'blue']);
      }, 100);
    });
  }
});
```
This causes the tests to hang on the index acceptance test. Why is this?
{'fraction_non_alphanumeric': 0.10865874363327674, 'fraction_numerical': 0.010186757215619695, 'mean_word_length': 3.953781512605042, 'pattern_counts': {'":': 0, '<': 3, '<?xml version=': 0, '>': 3, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '1906208', 'n_tokens_mistral': 336, 'n_tokens_neox': 317, 'n_words': 137}