Convert string to filestream in c#

Question

Just started with writing unit tests and I am now, blocked with this situation:

I have a method which has a FileStream object and I am trying to pass a "string" to it. So, I would like to convert my string to FileStream and I am doing this:

File.WriteAllText(string.Concat(Environment.ExpandEnvironmentVariables("%temp%"),   
 @"/test.txt"), testFileContent); //writes my string to a temp file!


new FileStream(string.Concat(Environment.ExpandEnvironmentVariables("%temp%"),  
    @"/test.txt"), FileMode.Open) //open that temp file and uses it as a fileStream!

close the file then!

But, I guess there must be some very simple alternative to convert a string to a fileStream.

Suggestions are welcome! [Note there are other answers to this question in stackoverflow but none seems to be a straight forward solution to that]

Thanks in advance!

Answer 1

First of all change your method to allow Stream instead of FileStream. FileStream is an implementation which, as I remember, does not add any methods or properties, just implement abstract class Stream. And then using below code you can convert string to Stream:

public Stream GenerateStreamFromString(string s)
{
    MemoryStream stream = new MemoryStream();
    StreamWriter writer = new StreamWriter(stream);
    writer.Write(s);
    writer.Flush();
    stream.Position = 0;
    return stream;
}