public void ReturnUpdatedTransactions_WhenDeleteTransaction() { var expectedResult = new List <Transaction>(); var transactionToDelete = new Transaction() { Id = 1, Sum = -10, Description = "McDonalds", DateTime = "2018-04-28", AccountToIncreaseName = "Cafe", AccountToSubstractName = "Salary" }; transactionsService.DeleteTransaction(transactionToDelete); var actualResult = transactionsService.GetTransactions(); actualResult.Should().BeEquivalentTo(expectedResult); }