/**
  * @covers ::normalize
  */
 public function testNormalizeWithNoEntity()
 {
     $entity_reference = $this->prophesize(TypedDataInterface::class);
     $entity_reference->getValue()->willReturn(NULL)->shouldBeCalled();
     $this->fieldItem->get('entity')->willReturn($entity_reference->reveal())->shouldBeCalled();
     $normalized = $this->normalizer->normalize($this->fieldItem->reveal());
     $expected = ['target_id' => ['value' => 'test']];
     $this->assertSame($expected, $normalized);
 }