private void TestRoundTripping(CompilationUnitSyntax node, string text, bool disallowErrors = true)
{
Assert.NotNull(node);
var fullText = node.ToFullString();
Assert.Equal(text, fullText);
if (disallowErrors)
{
Assert.Empty(node.GetDiagnostics());
}
else
{
Assert.NotEmpty(node.GetDiagnostics());
}
}