public void SimpleTest()
{
var wordUtil = new WordUtil();
var words = new string[] { "tap", "taps", "top", "tops" };
var expectWordCount = words.Length;
wordUtil.AddWords(words);
Assert.AreEqual(expectWordCount, wordUtil.Count);
var ms = new MemoryStream();
wordUtil.SaveTo(ms);
Assert.Greater(ms.Length, 0);
ms.Position = 0;
wordUtil = WordUtil.LoadFrom(ms);
Assert.AreEqual(expectWordCount, wordUtil.Count);
}