public void KeywordFilterTest()
{
var exporter = new ConversationExporter();
exporter.ExportConversation("chat.txt", "chat.json");
var serializedConversation = new StreamReader(new FileStream("chat.json", FileMode.Open)).ReadToEnd();
var savedConversation = JsonConvert.DeserializeObject<Conversation>(serializedConversation);
var messages = savedConversation.messages.ToList();
TextFilter filter = new TextFilter();
string keyword = "angus";
var actual1 = filter.KeywordFilter(messages, keyword);
string actualString1 = actual1[0].content;
Assert.That(actualString1, Is.EqualTo("no, let me ask Angus..."));
}