public void DeleteUnitById_ShouldReturn_Success()
        {
            // Arrange
            fakeUnitsRepository.Setup(a => a.DeleteById(1));
            unitsService = new UnitsService(fakeUnitsRepository.Object);

            try
            {
                // Act
                unitsService.DeleteUnitById(1);
                operationSucceeded = true;
            }
            catch (Exception ex)
            {
                errorMessage = ex.Message + " | " + ex.StackTrace;
            }

            // Assert
            Assert.IsTrue(operationSucceeded, errorMessage);
        }