public void getCutomerAccountsSuccessTest() { moqRepository.Setup(p => p.getCustomerAccounts(1)).Returns(new List <Account> { new Account() { AccountId = 1, CustomerId = 1, Balance = 1000, AccountType = "Savings", minBalance = 1000 }, new Account() { AccountId = 2, CustomerId = 1, Balance = 1000, AccountType = "Current", minBalance = 0 } }); var result = providerObj.getCustomerAccounts(1); Assert.That(result, Is.Not.Null); }