public async Task GetPartContent()
{
DbModel.Message testMessage1 = await GetTestMessage1();
TestMessagesRepository messagesRepository = new TestMessagesRepository(testMessage1);
MessagesController messagesController = new MessagesController(messagesRepository);
var parts = messagesController.GetMessage(testMessage1.Id).Parts.Flatten(p => p.ChildParts).SelectMany(p => p.Attachments);
var part = parts.First(p => p.FileName == "file2");
var result = messagesController.GetPartContent(testMessage1.Id, part.Id);
var stringResult = await new StreamReader(result.FileStream, Encoding.UTF8).ReadToEndAsync();
Assert.Equal(testMessage1File2Content, stringResult);
}
