/// <summary>
/// Performs a test that `ReadDelimitedDataFrom` can read the same data back as was written in various different encodings.
/// </summary>
public void TestReadDelimitedDataFrom()
{
//Unicode string
string testString = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01234567890!@#$%^&*()_+-=";
int testStringLength = testString.Length;
//With every encoding in the system
foreach (var encodingInfo in System.Text.Encoding.GetEncodings())
{
//Create a new memory stream
using (var ms = new System.IO.MemoryStream())
{
//Get the encoding
var encoding = encodingInfo.GetEncoding();
System.Console.WriteLine("Testing: " + encoding.EncodingName);
//Create a writer on that same stream using a small buffer
using (var streamWriter = new System.IO.StreamWriter(ms, encoding, 1, true))
{
//Get the binary representation of the string in the encoding being tested
var encodedData = encoding.GetBytes(testString);
//Cache the length of the data
int encodedDataLength = encodedData.Length;
//Write the value in the encoding
streamWriter.Write(testString);
//Ensure in the stream
streamWriter.Flush();
//Go back to the beginning
ms.Position = 0;
string actual;
int read;
//Ensure that was read correctly using the binary length and not the string length
//(should try to over read)
if (false != EncodingExtensions.ReadDelimitedDataFrom(encoding, ms, null, encodedDataLength, out actual, out read))
{
throw new System.Exception("ReadDelimitedDataFrom failed.");
}
//Ensure the position
if (ms.Position > encodedDataLength + encoding.GetPreamble().Length)
{
throw new System.Exception("Stream.Position is not correct.");
}
//Ensure the strings are equal (The extra byte is spacing)
int difference = string.Compare(encoding.GetString(encoding.GetBytes(testString)), actual);
if (difference != 0 && difference > 1)
{
throw new System.Exception("string data is incorrect.");
}
Console.WriteLine(actual);
}
}
}
}
