Address review feedback.

- Update paragraph assert method description.
- Replace switch statement with generalized `$entity->label()`.
- Add comment around node loading logic.

src/Palantirnet/PalantirBehatExtension/Context/EntityDataContext.php

@@ -400,7 +400,7 @@ public function assertNotEntityFieldValue($field, $value)
     }//end assertNotEntityFieldValue()
 
     /**
-     * Verify that a field contains a value.
+     * Verify that a paragraph field contains a paragraph of a certain type.
      *
      * @Then paragraph field :field should be of type :type
      *
@@ -552,31 +552,21 @@ public function assertEntityFieldValueEntityReference($field, $value)
              */
             foreach ($entities as $entity) {
 
-                switch ($entity->getEntityTypeId()) {
-                    case 'node':
-                        $title = $entity->title->value;
-                        break;
-
-                    case 'paragraph':
-                        throw new \Exception('Paragraphs do not have titles, so they must be tested by a different method.');
-                        break;
-
-                    case 'taxonomy_term':
-                    case 'user':
-                    case 'media':
-                    default:
-                        $title = $entity->name->value;
-                        break;
+                if ($entity->getEntityTypeId() === 'paragraph') {
+                     throw new \Exception('Paragraphs do not have meaningful labels, so they must be tested by a different method.');
+                    // If we get a single paragraph reference, we will assume
+                    // that the rest are also paragraphs and exit the method.
+                    return;
                 }
 
-                $titles[] = $title;
+                $labels[] = $entity->label();
 
-                if ($title === $value) {
+                if ($entity->label() === $value) {
                     return;
                 }
             }
 
-            throw new \Exception(sprintf('Field does not contain entity with title "%s" (has "%s" titles instead).', $value, json_encode($titles)));
+            throw new \Exception(sprintf('Field does not contain entity with label "%s" (has "%s" labels instead).', $value, json_encode($labels)));
         }
 
         throw new \Exception('Field is empty.');

src/Palantirnet/PalantirBehatExtension/Context/SharedDrupalContext.php

@@ -51,6 +51,11 @@ public function findNodeByTitle($contentType, $title, $language = NULL)
         if (count($entities) === 1) {
             $node_storage = \Drupal::entityManager()->getStorage('node');
 
+            // `entityQuery` will return an array of node IDs with key and
+            // value equal to the nids.
+            // Example: `[123 => '123', 456 => '456']`. For this reason, even
+            // though there is only a single element, we cannot access the
+            // first element using `$entities[0]`.
             $nid = array_shift($entities);
 
             $node = $node_storage->load($nid);