public void CopyTo_Flattens()
{
// Arrange
var buffer = new ViewBuffer(new TestViewBufferScope(), "some-name", pageSize: 4);
var nestedItems = new List <object>();
var nested = new HtmlContentBuilder(nestedItems);
nested.AppendHtml("Hello");
buffer.AppendHtml(nested);
var destinationItems = new List <object>();
var destination = new HtmlContentBuilder(destinationItems);
// Act
buffer.CopyTo(destination);
// Assert
Assert.Same(nested, buffer.Pages[0].Buffer[0].Value);
Assert.Equal("Hello", Assert.IsType <HtmlEncodedString>(nestedItems[0]).Value);
Assert.Equal("Hello", Assert.IsType <HtmlEncodedString>(destinationItems[0]).Value);
}