How to make multiple mock types with different TypeId when mocking a trait

[richardzone]

I'd like to test some code which uses TypeId and downcast_ref. I wonder if there is any way to make multiple mock types with different TypeId when mocking a trait?

#[automock]
trait Task {}

// In real implementation code I have different types of Tasks stored within a Vec<Box<dyn Task>>
// And I'd perform "std::any"-based operations on these tasks
struct A;
impl Task for A {}
struct B;
impl Task for B {}

// What I'd like to achieve is to make the following test pass:
#[test]
fn test() {
    let task_a = MockTask::new();
    let task_b = AnotherMockTask::new();
    assert_ne!(task_a.type_id(), task_b.type_id());
    assert_ne!(TypeId::of::<MockTask>(), TypeId::of::<AnotherMockTask>());
}

[asomers]

Sure. It's easy. You can only use automock once, but you can use mock! as much as you like.

#[automock]
trait Task{}
mock!{
    pub OtherTask{}
    impl Task for OtherTask{}
}