public void IsClientHasStockTypeTest() { // Arrange var blockOfSharesRepositoryMock = Substitute.For <IBlockOfSharesRepository>(); var sut = new BlockOfSharesManager(blockOfSharesRepositoryMock); int clientID = 2; int shareID = 3; // Act sut.IsClientHasStockType(clientID, shareID); // Asserts blockOfSharesRepositoryMock.Received(1).IsClientHasShareType(Arg.Is <int>(clientID), Arg.Is <int>(shareID)); }