public void Write()
{
//---------------Set up test pack-------------------
var dataStore = new DataStoreInMemory();
dataStore.Add(new Car());
var stream = new MemoryStream();
var writer = new DataStoreInMemoryXmlWriter();
//---------------Assert Precondition----------------
Assert.AreEqual(1, dataStore.Count);
Assert.AreEqual(0, stream.Length);
//---------------Execute Test ----------------------
writer.Write(stream, dataStore);
//---------------Test Result -----------------------
Assert.AreNotEqual(0, stream.Length);
}