= not implemented for anchor_lang::error::Error

[guibescos]

I've been struggling to cargo test my code.
Basically I want to create a unit test that runs a function and checks the returned error against an Anchor Error.

When I run :
assert_eq!(returns_error(), Err(error!(ErrorCode::MyError)))
I get :
error[E0369]: binary operation `==` cannot be applied to type `Result<(), anchor_lang::error::Error>
Reproducible example : https://github.com/guibescos/anchor-issue-error-equals
Run : cargo test

[guibescos]

I seems to me like the equal operation might need to get implemented. Wanted to get some thoughts from the community on how easy this is to PR.

[callensm]

This would be a very simple pull request, but what is the use case for equating two errors within the contract code?

[guibescos]

rust tests, check my minimal example in the shared repo

#[test]
fn test_error_2() {
    fn returns_error() -> Result<()> {
        return Err(error!(ErrorCode::MyError));
    }

    assert_eq!(returns_error(), Err(error!(ErrorCode::MyError)))
}