public async void GivenRejectJobApplication_WhenRejectingAJobApplication_ThenJobApplicationIsRejected()
{
var testGuid = Guid.NewGuid();
var testJobApp = new JobApplication(testGuid, Guid.NewGuid(), Guid.NewGuid(), 2);
//Given
var mockRepo = Substitute.For <JobApplicationRepository>();
mockRepo.GetById(testGuid)
.Returns(Task.FromResult(testJobApp));
var mockRepoFile = Substitute.For <FileRepository>();
mockRepo.Update(testJobApp)
.Returns(Task.FromResult(testJobApp));
var mockLogger = Substitute.For <ILoggerManager>();
var _jobApplcaitionService = new JobApplicationService(mockRepo, mockRepoFile, mockLogger);
//When
await _jobApplcaitionService.UpdateStatusOfJobApplication(testGuid.ToString(), 3);
//Then
Assert.True(testJobApp.StatusId == 3);
}