@Test
  public void uploadAvatarForChromeAndFFShouldReturnPreviewInResponce()
      throws ImageProcessException {
    MockHttpServletResponse response = new MockHttpServletResponse();

    avatarController.uploadAvatar(validAvatar, response);

    verify(imageControllerUtils).prepareResponse(eq(validAvatar), eq(response), any(HashMap.class));
  }
  @Test
  @SuppressWarnings("unchecked")
  public void uploadAvatarForOperaAndIEShouldReturnPreviewInResponce()
      throws IOException, ImageProcessException {
    MultipartFile file = new MockMultipartFile("qqfile", validAvatar);

    ResponseEntity<String> actualResponseEntity = avatarController.uploadAvatar(file);

    verify(imageControllerUtils)
        .prepareResponse(eq(file), any(HttpHeaders.class), any(HashMap.class));
  }