Comments (2)
Your problem is that Apple
and MockApple
are different structs, and you've defined bar
to take the former in all cases. What you want to do is to define bar
to accept MockApple
in test mode. A key requirement is that you define bar
and Apple
in different modules. See the example at https://docs.rs/mockall/latest/mockall/#mocking-structs . The example uses mockall_double , but you can also do it by hand with the appropriate #[cfg()]
statements.
from mockall.
aahhh I understand now - so I had to do this:
mod first {
use mockall::*;
pub struct Apple {}
#[automock]
impl Apple {
pub fn foo(&self) -> String {
String::from("foo")
}
}
}
mod second {
use mockall_double::double;
#[double]
use super::first::Apple;
pub fn bar(apple: Apple) -> String {
apple.foo()
}
}
#[cfg(test)]
mod tests {
use crate::{super::{first::MockApple, second::bar}};
use super::*;
use googletest::prelude::*;
#[googletest::test]
fn test_generate_tokens_for_user() {
let mut mock_apple = MockApple::default();
mock_apple.expect_foo().returning(|| "mock foo".to_string());
let result = bar(mock_apple);
println!("result: {}", result);
}
}
I grabbed the mockall_double crate - which I guess handles the magic of swapping the structs out for test etc
Thanks for the help
from mockall.
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