Find a mechanism to enforce Metadata dependencies

[andreafioraldi]

At the current state, we don't have any mechanism to enforce the presence of some testcase or state metadata apart from returning errors at runtime when one component that needs such metadata want to use it without success.

Can we enforce this earlier in the code, e.g. when the component is created? Or even at compile time maybe?

[evanrichter]

the presence of a testcase could be done at compile time perhaps with include_bytes!("../corpus/testcase1") but then compile-time and runtime could potentially diverge if that file changes or disappears

[domenukk]

Feedbackstate has been refactored so this isn't really needed anymore, I think. Closing