private async ValueTask <Student> TryCatch(ReturningStudentFunction returningStudentFunction)
{
try
{
return(await returningStudentFunction());
}
catch (NullStudentException nullStudentException)
{
throw CreateAndLogValidationException(nullStudentException);
}
catch (InvalidStudentException invalidStudentException)
{
throw CreateAndLogValidationException(invalidStudentException);
}
catch (NotFoundStudentException nullStudentException)
{
throw CreateAndLogValidationException(nullStudentException);
}
catch (SqlException sqlException)
{
var failedStudentStorageException =
new FailedStudentStorageException(sqlException);
throw CreateAndLogCriticalDependencyException(failedStudentStorageException);
}
catch (DuplicateKeyException duplicateKeyException)
{
var alreadyExistsStudentException =
new AlreadyExistsStudentException(duplicateKeyException);
throw CreateAndLogDependencyValidationException(alreadyExistsStudentException);
}
catch (DbUpdateConcurrencyException dbUpdateConcurrencyException)
{
var lockedStudentException = new LockedStudentException(dbUpdateConcurrencyException);
throw CreateAndLogDependencyException(lockedStudentException);
}
catch (DbUpdateException dbUpdateException)
{
var failedStudentStorageException =
new FailedStudentStorageException(dbUpdateException);
throw CreateAndLogDependencyException(failedStudentStorageException);
}
catch (Exception exception)
{
var failedStudentServiceException =
new FailedStudentServiceException(exception);
throw CreateAndLogServiceException(failedStudentServiceException);
}
}
public async Task ShouldThrowDependencyExceptionOnModifyIfDbUpdateConcurrencyExceptionOccursAndLogItAsync()
{
// given
Student someStudent = CreateRandomStudent();
int randomDays = GetRandomNumber();
someStudent.UpdatedDate =
someStudent.CreatedDate.AddDays(randomDays);
var databaseUpdateConcurrencyException =
new DbUpdateConcurrencyException();
var lockedStudentException =
new LockedStudentException(databaseUpdateConcurrencyException);
var expectedStudentDependencyException =
new StudentDependencyException(lockedStudentException);
this.dateTimeBrokerMock.Setup(broker =>
broker.GetCurrentDateTime())
.Throws(databaseUpdateConcurrencyException);
// when
ValueTask <Student> modifyStudentTask =
this.studentService.ModifyStudentAsync(someStudent);
// then
await Assert.ThrowsAsync <StudentDependencyException>(() =>
modifyStudentTask.AsTask());
this.dateTimeBrokerMock.Verify(broker =>
broker.GetCurrentDateTime(),
Times.Once);
this.loggingBrokerMock.Verify(broker =>
broker.LogError(It.Is(SameExceptionAs(
expectedStudentDependencyException))),
Times.Once);
this.storageBrokerMock.Verify(broker =>
broker.UpdateStudentAsync(It.IsAny <Student>()),
Times.Never);
this.dateTimeBrokerMock.VerifyNoOtherCalls();
this.loggingBrokerMock.VerifyNoOtherCalls();
this.storageBrokerMock.VerifyNoOtherCalls();
}
public async Task ShouldThrowDependencyExceptionOnDeleteIfDatabaseUpdateConcurrencyErrorOccursAndLogItAsync()
{
// given
Guid someStudentId = Guid.NewGuid();
var databaseUpdateConcurrencyException =
new DbUpdateConcurrencyException();
var lockedStudentException =
new LockedStudentException(databaseUpdateConcurrencyException);
var expectedStudentDependencyException =
new StudentDependencyException(lockedStudentException);
this.storageBrokerMock.Setup(broker =>
broker.SelectStudentByIdAsync(It.IsAny <Guid>()))
.ThrowsAsync(databaseUpdateConcurrencyException);
// when
ValueTask <Student> deleteStudentTask =
this.studentService.RemoveStudentByIdAsync(someStudentId);
// then
await Assert.ThrowsAsync <StudentDependencyException>(() =>
deleteStudentTask.AsTask());
this.storageBrokerMock.Verify(broker =>
broker.SelectStudentByIdAsync(It.IsAny <Guid>()),
Times.Once);
this.loggingBrokerMock.Verify(broker =>
broker.LogError(It.Is(SameExceptionAs(
expectedStudentDependencyException))),
Times.Once);
this.storageBrokerMock.VerifyNoOtherCalls();
this.loggingBrokerMock.VerifyNoOtherCalls();
this.dateTimeBrokerMock.VerifyNoOtherCalls();
}