public void ShouldHaveOnlyDebitTransactionsWhenGetDebitTransactions() { // Arrange var faker = new Faker(); var csvPath = faker.Random.String2(2); _transactionServices.LoadTransactions(csvPath); // Act var debitTransactions = _transactionServices.GetDebitTransactions(); // Assert Assert.DoesNotContain(debitTransactions, t => t.Amount >= 0); }