/**
  * @covers Core\Entity\StudentInGroups::refreshTimeStamps
  */
 public function testRefreshTimeStamps()
 {
     $studentInGroups = new StudentInGroups($this->mockEntityManager);
     $studentInGroups->refreshTimeStamps();
     $createdAt = $studentInGroups->getCreatedAt();
     $this->assertNotNull($createdAt);
     $this->assertNull($studentInGroups->getUpdatedAt());
     $studentInGroups->refreshTimeStamps();
     $updatedAt = $studentInGroups->getUpdatedAt();
     $this->assertNotNull($updatedAt);
     $this->assertEquals($createdAt, $studentInGroups->getCreatedAt());
 }
 /**
  * @covers Core\Entity\StudentInGroups::setUpdatedAt
  * @covers Core\Entity\StudentInGroups::getUpdatedAt
  */
 public function testSetGetUpdatedAt()
 {
     $dt = new DateTime();
     $this->studentInGroups->setUpdatedAt($dt);
     $this->assertEquals($dt, $this->studentInGroups->getUpdatedAt());
 }