Assert that the given changeset, query, or action input has a matching error.

Use the optional second argument to assert that the errors (all together) are of a specific class.

Refute that the given changeset, query, or action input has a matching error.

The error_class argument has been deprecated and should not be used.

Clears the __metadata__ field and the underlying ecto __meta__ field

This allows for easier comparison of changeset/query results