public async Task WhenPostingDeleteApplications_ThenApplicastionsDeleted()
{
// Arrange
var request = new DeleteApplicationsRequest();
// Act
var controllerResult = await _controller.DeleteApplications(request) as NoContentResult;
// Assert
controllerResult.StatusCode.Should().Be((int)HttpStatusCode.NoContent);
_mockMediator.Verify(x => x.Send(request, It.IsAny <CancellationToken>()));
}