public void ReadingXmlWithStreamReaderCanThrowErrorsWhenReading()
{
string xml = "<?xml version='1.0' encoding='utf-16'?><hello><world/></hello>";
using (StreamReader sr = new StreamReader(StreamUtils.UnicodeMemoryStreamWithBom(xml)))
{
//reading here causes exceptions reading xml later
sr.ReadToEnd();
sr.BaseStream.Position = 0;
string output2 = sr.ReadToEnd();
//not testing yet just clarifying assumptions
Assert.That(output2.StartsWith(StreamUtils.BomFor(Encoding.Unicode)),
Is.True,
"Bom character output on the second read");
sr.BaseStream.Position = 0;
using (XmlTextReader xmlReader = new XmlTextReader(sr))
{
try
{
xmlReader.Read();
Assert.Fail("Should have already failed");
}
catch (XmlException ex)
{
Assert.That(ex.Message, Text.StartsWith("Data at the root level is invalid"));
}
}
}
}
public void Gotcha_StreamReader_OnSecondReadWillWriteOutBomEmbeddedInStream()
{
string bom = StreamUtils.BomFor(Encoding.Unicode);
using (StreamReader reader = new StreamReader(StreamUtils.UnicodeMemoryStreamWithBom("Hello World")))
{
Assert.That(reader.ReadToEnd().Contains(bom), Is.False);
reader.BaseStream.Position = 0;
Assert.That(reader.ReadToEnd().Contains(bom), Is.True);
}
}