public void AddUnit_ShouldReturn_Success() { // Arrange UnitsModel unit = new UnitsModel { Name = "g", Notes = "gram" }; fakeUnitsRepository.Setup(a => a.Add(unit)); unitsService = new UnitsService(fakeUnitsRepository.Object); try { // Act unitsService.AddUnit(new UnitsDtoModel { Name = unit.Name, Notes = unit.Notes }); operationSucceeded = true; } catch (Exception ex) { errorMessage = ex.Message + " | " + ex.StackTrace; } // Assert Assert.IsTrue(operationSucceeded, errorMessage); }