<?php

namespace UoMCS\OpenBadges\Backend;

class EarnerTest extends DatabaseTestCase
{
  const EARNER_COUNT = 2;
  const EARNER_EXISTS_ID = 1;
  const EARNER_DOES_NOT_EXIST_ID = 99999;

  public function testAllEarnersDB()
  {
    $earners = Earner::getAll();
    $this->assertInternalType('array', $earners);
    $this->assertCount(self::EARNER_COUNT, $earners);

    foreach ($earners as $earner)
    {
      $this->assertInstanceOf('UoMCS\\OpenBadges\\Backend\\Earner', $earner);
    }
  }

  public function testEarnerExistsDB()
  {
    $earner = Earner::get(self::EARNER_EXISTS_ID);
    $this->assertInstanceOf('UoMCS\\OpenBadges\\Backend\\Earner', $earner);
  }

  public function testEarnerDoesNotExistDB()
  {
    $earner = Earner::get(self::EARNER_DOES_NOT_EXIST_ID);
    $this->assertNull($earner);
  }
}

<?php

namespace UoMCS\OpenBadges\Backend;

class EarnerTest extends DatabaseTestCase
{
  const EARNER_COUNT = 2;
  const EARNER_EXISTS_ID = 1;
  const EARNER_DOES_NOT_EXIST_ID = 99999;

  public function testAllEarnersDB()
  {
    $earners = Earner::getAll();
    $this->assertInternalType('array', $earners);
    $this->assertCount(self::EARNER_COUNT, $earners);
  }

  public function testEarnerExistsDB()
  {
    $earner = Earner::get(self::EARNER_EXISTS_ID);
    $this->assertInstanceOf('UoMCS\\OpenBadges\\Backend\\Earner', $earner);
  }

  public function testEarnerDoesNotExistDB()
  {
    $earner = Earner::get(self::EARNER_DOES_NOT_EXIST_ID);
    $this->assertNull($earner);
  }
}

--- 
+++ 
@@ -13,6 +13,11 @@
     $earners = Earner::getAll();
     $this->assertInternalType('array', $earners);
     $this->assertCount(self::EARNER_COUNT, $earners);
+
+    foreach ($earners as $earner)
+    {
+      $this->assertInstanceOf('UoMCS\\OpenBadges\\Backend\\Earner', $earner);
+    }
   }
 
   public function testEarnerExistsDB()
Check that all results from Earner::getAll() are of type Earner
