public void TransactionFileReader_ShouldReadTransaction_WhenIncorrectDataProvided(string entry)
        {
            // Arrange
            var merchants = new Dictionary <string, Merchant>();

            merchants.Add("7-ELEVEN", new Merchant()
            {
                DiscountPercentage = 0, Name = sevenEleven, FeeAsPercentage = 1
            });
            var exceptionTrhown   = false;
            var transactionReader = new TransactionFileReader();

            // Incorrect date format
            var          memoryStream = GenerateStreamFromString(entry);
            StreamReader reader       = new StreamReader(memoryStream);

            // Act
            try
            {
                var transaction = transactionReader.ReadSingleEntry(reader, merchants, new TransactionParser());
            }
            catch (Exception exception)
            {
                exceptionTrhown = true;
                Assert.Equal("Improper format of transaction date", exception.Message);
            }

            // Assert
            Assert.True(exceptionTrhown);
        }
        public void TransactionFileReader_ShouldReadTransaction_WhenCorrectDataProvided()
        {
            // Arrange
            var merchants = new Dictionary <string, Merchant>();

            merchants.Add("7-ELEVEN", new Merchant()
            {
                DiscountPercentage = 0, Name = sevenEleven, FeeAsPercentage = 1
            });
            merchants.Add("CIRCLE_K", new Merchant()
            {
                DiscountPercentage = 20, Name = circleK, FeeAsPercentage = 1
            });
            merchants.Add("TELIA", new Merchant()
            {
                DiscountPercentage = 10, Name = telia, FeeAsPercentage = 1
            });
            merchants.Add("NETTO", new Merchant()
            {
                DiscountPercentage = 0, Name = netto, FeeAsPercentage = 1
            });

            var          transactionReader = new TransactionFileReader();
            var          text         = @"2018-09-01 7-ELEVEN 100
2018-09-04 CIRCLE_K 200";
            var          memoryStream = GenerateStreamFromString(text);
            StreamReader reader       = new StreamReader(memoryStream);

            // Act
            var transaction = transactionReader.ReadSingleEntry(reader, merchants, new TransactionParser());

            // Assert
            Assert.Equal(sevenEleven, transaction.Owner.Name);
            Assert.Equal(new DateTime(2018, 9, 1), transaction.DoneOn);
            Assert.Equal(100M, transaction.Amount);
        }