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); }