public void AverageTest()
{
string expected = @"<?xml version=""1.0"" encoding=""utf-8""?>" +
"<avg>PRICE</avg>";
Stream stream = new MemoryStream();
XmlWriterSettings xmlSettings = new XmlWriterSettings
{
Encoding = Encoding.GetEncoding("UTF-8")
};
IaXmlWriter xml = new IaXmlWriter(stream, xmlSettings);
SelectBuilder builder = new SelectBuilder();
ISelect[] fields = builder.Average("PRICE").GetFields();
foreach (var field in fields)
{
field.WriteXml(ref xml);
}
xml.Flush();
stream.Position = 0;
StreamReader reader = new StreamReader(stream);
Assert.Equal(expected, reader.ReadToEnd());
}