将回车符字符串文字转换为回车符

Question

I have a data driven test in C# that verifies a function properly creates a string given an input.

Code under test:

public static class Formatter
{
    public static String FormatWithCarriageReturn(int position)
    {
        return String.Format("#0 P{0} T1000 \r", position);
    }
}

The FormatWithCarriageReturn must return the string with the carriage return appended.

In order to test this method, I created a data driven test in MSTest that loads data from a CSV file.

CSV File:

position, expected
1, #0 P1 T1000 \r
2, #0 P2 T1000 \r
3, #0 P3 T1000 \r
4, #0 P4 T1000 \r
5, #0 P5 T1000 \r
6, #0 P6 T1000 \r

Test Method:

/* Test method and data source attributes*/
public void FormattingWithCarriageReturnFormatsCorrectly()
{
    String expected = TestContext.DataRow["expected"].ToString();
    /* various setup code. */
    int requestedPosition = Convert.ToInt32(TestContext.DataRow["position"]);
    String actual = Formatter.FormatWithCarriageReturn(requestedPosition);
    Assert.AreEqual(expected, actual);
}

The problem is the TestContext.DataRow["expected"].ToString() statement will load the string literal #0 P1 T1000 \\\\r , and the Assert fails because it is comparing #0 P1 T1000 \\r with #0 P1 T1000 <- I can't get this to format correctly. There should be a carriage return at the end.

Is there a way to get the expected string out of the CSV file with the carriage return in place? I could list the expected string in the CSV file as #0 P1 T1000 , and then do something like expected = String.Concat(expected, " \\r"); , but I'd like to keep the full expected string in the CSV file.

Edit: Here's the current Assert message that I'm getting:

Result1 Message: Assert.AreEqual failed. Expected:<#0 P1 T1000 \r>. Actual:<#0 P1 T1000
>.

A passing message would read

Result1 Message: Assert.AreEqual passed. Expected:<#0 P1 T1000 
>. Actual:<#0 P1 T1000
>.

Note that both expected and actual have the carriage return at the end.

Answer 1

Remove the "\\r" from the lines in the csv file and change

String expected = TestContext.DataRow["expected"].ToString();

to

String expected = TestContext.DataRow["expected"].ToString() +
    new String(new[] { (char)0x0D });