ContactPhotoUploadControllerTest.cls

@IsTest
private class ContactPhotoUploadControllerTest {

  @IsTest
  private static void saveFileTest () {
    ContactPhotoUploadController controller = new ContactPhotoUploadController(new ApexPages.StandardController());

    PageReference pr = controller.saveFile();

    System.assertEquals(null, pr);

  }

  @IsTest
  private static void toggleTest() {
    ContactPhotoUploadController controller = new ContactPhotoUploadController(new ApexPages.StandardController());
    controller.displaying = true;
    controller.toggle();

    System.assertEquals(controller.displaying, false);

  }

}