Add test for coverage

composer.json

@@ -27,7 +27,6 @@
     },
     "require-dev": {
         "codeigniter4/codeigniter4": "dev-develop",
-        "tatter/imposter": "^1.0",
         "tatter/tools": "^1.15"
     },
     "autoload": {

src/Entities/Email.php

@@ -3,6 +3,7 @@
 namespace Tatter\Outbox\Entities;
 
 use CodeIgniter\Entity\Entity;
+use RuntimeException;
 
 class Email extends Entity
 {
@@ -58,11 +59,13 @@ public function getRecipients(): array
      * Helper function to return attachments or recipients.
      *
      * @param string $target Object/table/model to request
+     *
+     * @throws RuntimeException
      */
     protected function getRelatedItems(string $target): array
     {
         if (empty($this->id)) {
-            throw new \RuntimeException('Object must be created before getting relations.');
+            throw new RuntimeException('Object must be created before getting relations.');
         }
 
         $property = $target . 's';

tests/entities/EmailTest.php

@@ -57,4 +57,14 @@ public function testGetRecipients()
         $this->assertInstanceOf(Recipient::class, $result[0]);
         $this->assertSame('to@example.com', $result[0]->email);
     }
+
+    public function testGetRelatedUncreatedThrows()
+    {
+        $email = new Email();
+
+        $this->expectException('RuntimeException');
+        $this->expectExceptionMessage('Object must be created before getting relations.');
+
+        $email->getRecipients();
+    }
 }