Comments (4)
So something like #[automock(const N=5;)]
or whatever keyword you'd choose for the const generic, right?
from mockall.
More fundamentally, mocking fields isn't even possible. How would you propose accessing the mock object's elements
array?
from mockall.
Yeah, sorry. That example doesn't make sense. While trying to come up with a simple thing I got confused.
Next try: the trait FixedContainer
can be mocked but the Container
trait can't be.
// #[cfg_attr(test, mockall::automock)] // Macro panics
pub trait Container<const N: usize> {
fn times(&mut self, m: [u32; N]);
fn add(&mut self, m: [u32; N]);
}
#[cfg_attr(test, mockall::automock)]
pub trait FixedContainer {
fn times(&mut self, m: [u32; 3]);
fn add(&mut self, m: [u32; 3]);
}
pub struct Outer<T: FixedContainer> {
container: T,
}
impl<T: FixedContainer> Outer<T> {
pub fn new(container: T) -> Self {
Self { container }
}
pub fn arithmetic(&mut self, number: u32, add: bool) {
if add {
self.container.add([number; 3]);
} else {
self.container.times([number; 3]);
}
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn fixed_container() {
let mut mocked = MockFixedContainer::new();
mocked.expect_add().once().returning(|_| ());
mocked.expect_times().once().returning(|_| ());
let mut outer = Outer::new(mocked);
outer.arithmetic(1, true);
outer.arithmetic(1, false);
}
}
Does that make more sense? Is there any fundamental reason why this can't be supported?
from mockall.
I think it could be done. But just as you must for associated types. you'd have to tell automock what value of N to use.
from mockall.
Related Issues (20)
- Anonymous lifetime in trait method HOT 6
- Mocking an internal struct with external dependency HOT 7
- Capturing arguments from returning HOT 2
- Struggling to mock trait objects and make assertions on functions that take ownership of mock trait object HOT 4
- Mock trait with methods that return iterators HOT 8
- Mock Trait that is a composition of two other traits HOT 2
- Struct with different traits that has identically named methods HOT 1
- Can't apply `automock` to traits with default method implementions marked `#[inline]` HOT 1
- Remove ...
- Problem with mocking a trait which uses &Self HOT 1
- Mockall Double of struct in external crate HOT 2
- mocking struct & mockall_double::double not working as expected HOT 10
- Mocking with tokio::sync::Mutex, confused for std::sync::Mutex HOT 4
- Feature request: create a `spy!` macro to provide a transparent mock but that can be asserted upon. HOT 6
- Mocking Default Trait Method Implementations HOT 4
- How to bypass a mock for a particular test and call the original function HOT 3
- automock fails for method taking Option<&u32> HOT 5
- MSRV 1.77.0 TODO
- Mocking a function taking an FnMut closure incompatible with concretize HOT 2
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