public void Collection_ToContainer() { // Arrange var collection = new DocumentCollection { ItemType = PlainText.MIME_TYPE, Items = new PlainText[] { new PlainText { Text = "Text 1" }, new PlainText { Text = "Text 2" }, new PlainText { Text = "Text 3" } } }; // Act var container = collection.ToDocumentContainer(); // Assert container.Value.ShouldBe(collection); }