Comments from event hosts are excluded

src/Service/Picker.php

@@ -72,6 +72,26 @@ class Picker
      */
     public function setComments(Collection $comments)
     {
-        $this->comments = $comments->flatten(1)->values();
+        $this->comments = $comments
+            ->flatten(1)
+            ->filter(function (array $comment) {
+                return !$this->isUserAnEventHost($comment['user_display_name']);
+            })
+            ->values();
+
+        return $this;
+    }
+
+    /**
+     * Determine whether a commenter is an event host.
+     *
+     * @param string $user_display_name
+     *   The user's display name.
+     *
+     * @return bool
+     */
+    private function isUserAnEventHost(string $user_display_name): bool
+    {
+        return $this->hosts->contains($user_display_name);
     }
 }

tests/Service/PickerTest.php

@@ -42,11 +42,20 @@ class PickerTest extends TestCase
     {
         $comments = [
             [
-                ['comment' => 'Great talk!'],
-                ['comment' => 'Could be better.'],
+                [
+                    'comment' => 'Great talk!',
+                    'user_display_name' => 'Dan Ackroyd',
+                ],
+                [
+                    'comment' => 'Could be better.',
+                    'user_display_name' => 'Lucia Velasco',
+                ],
             ],
             [
-                ['comment' => 'Needs more cat pictures.'],
+                [
+                    'comment' => 'Needs more cat pictures.',
+                    'user_display_name' => 'Rupert Jabelman',
+                ],
             ],
         ];
 
@@ -61,7 +70,37 @@ class PickerTest extends TestCase
     /** @test */
     public function comments_from_event_hosts_cannot_be_picked()
     {
-        $this->markTestIncomplete();
+        $event = [
+            'hosts' => [
+                ['host_name' => 'Oliver Davies'],
+            ],
+        ];
+
+        $comments = [
+            [
+                [
+                    'comment' => 'Great talk!',
+                    'user_display_name' => 'Peter Fisher',
+                ],
+                [
+                    'comment' => 'Text on slides could be bigger.',
+                    'user_display_name' => 'Oliver Davies',
+                ],
+                [
+                    'comment' => 'Speak slower.',
+                    'user_display_name' => 'Zan Baldwin',
+                ],
+            ],
+        ];
+
+        $comments = (new Picker())
+            ->setHosts(collect([$event]))
+            ->setComments(collect($comments))
+            ->getComments();
+
+        $this->assertCount(2, $comments);
+        $this->assertSame('Peter Fisher', $comments[0]['user_display_name']);
+        $this->assertSame('Zan Baldwin', $comments[1]['user_display_name']);
     }
 
     /** @test */