public void CreateTransaction_WithValidTransaction_ShouldSaveAndReturnId()
{
// Arrange
var transaction = new Transaction
{
Amount = 123.45m,
CategoryId = 101,
Date = DateTime.Today,
IsCredit = true,
Memo = "This is a test"
};
using var dbContext = GetDbContext();
var service = new TransactionsDataService(dbContext);
// Act
var result = service.CreateTransaction(transaction);
// Assert
Assert.AreNotEqual(default, result, FailureMessages.ResultNotExpectedValue);
public void CreateTransaction_WithNullTransaction_ShouldThrowException()
{
// Arrange
using var dbContext = GetDbContext();
var service = new TransactionsDataService(dbContext);
Exception caughtException = null;
// Act
try
{
service.CreateTransaction(null);
}
catch (Exception exception)
{
caughtException = exception;
}
// Assert
Assert.IsNotNull(caughtException, FailureMessages.ExceptionNotThrown);
Assert.IsInstanceOfType(caughtException, typeof(ArgumentNullException), FailureMessages.ExceptionNotExpectedType);
}
