mock static method one of two, how to do?

[tu6ge]

I have a trait like this:

trait A {
    fn from_string(name: String) -> Self where Self: Sized;
    fn from_xml(xml: String) -> Self where Self: Sized{
        // parse xml ...
        Self::from_string(xml.push_str("abc"))
    }
}

// and struct info
struct demo{
    name: String,
}

impl A for demo {
     fn from_string(name: String) -> Self {
         Self{name}
     }
}

how to I test from_xml with mock from_string ?

[asomers]

So you want to have a single object with some mock methods and other real methods? You can't, usually. An object must be either wholly mock or wholly real. But in this case it might just work since from_xml has a default implementation. You wouldn't ever be able to mock that function, though. What happens if you try, and just don't provide a definition for from_xml within your mock! block?

[tu6ge]

Okay,I don't entangle