Make it possible to (easily) figure out if a configuration can map between types

[erik-kallen]

It would be nice with a method IConfigurationProvider.CanMap(Type sourceType, Type destinationType).

I want this because I have tests that validate that a mapper will be able to perform all mappings I will be asking it to do.

[lbargaoanu]

https://docs.automapper.org/en/latest/Configuration-validation.html
See also this or this.

[lbargaoanu]

You're describing exactly what configuration validation already does for you, free of charge :)
What's not covered is, for example, when you're trying to map some types that are not anywhere in your mappings, some root types are missing. But surely that's an obvious error :)

[erik-kallen]

And that "obvious" error is what I want to catch in my tests.

[lbargaoanu]

Just call Map<Destination>(new Source()). But you're way off track here. For anything other than the most trivial map, you need a real unit test that verifies what you wrote in the mapping. That's what you really need to test, your own code.

[erik-kallen]

The suggestion works, though Map<TSource, TDestination>(default(Source)) works better in case there is no public constructor

[lbargaoanu]

Mapping from null will always succeed.