Adds ability to provide defaults for types provided by construct_runtime (#14682)

* Adds ability to use defaults for verbatim types

* Adds RuntimeOrigin and PalletInfo in DefaultConfig

* Adds RuntimeEvent in DefaultConfig

* Adds RuntimeEvent in DefaultConfig

* Minor fix

* Minor fix

* Everything in frame_system can now have a default

* Adds docs

* Adds UI Test for no_bounds

* Updates docs

* Adds UI tests for verbatim

* Minor update

* Minor updates

* Minor updates

* Addresses review comments

* Fixes test

* Update frame/support/procedural/src/derive_impl.rs

Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>

* Minor fix

* Minor

* Fixes build

* Uses runtime_type

* Fixes comment

* Fixes comment

* Fixes test

* Uses no_aggregated_types as an option in derive_impl

* Uses specific imports

* Fmt

* Updates doc

* Update frame/support/procedural/src/derive_impl.rs

Co-authored-by: Bastian Köcher <git@kchr.de>

* Update frame/support/procedural/src/derive_impl.rs

Co-authored-by: Bastian Köcher <git@kchr.de>

* Addresses review comment

* Addresses review comment

* fmt

* Renames test files

* Adds docs using docify

* Fixes test

* Fixes UI tests

---------

Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>
Co-authored-by: Bastian Köcher <git@kchr.de>

substrate/frame/system/src/lib.rs

@@ -205,7 +205,7 @@ pub mod pallet {
 
 	/// Default implementations of [`DefaultConfig`], which can be used to implement [`Config`].
 	pub mod config_preludes {
-		use super::DefaultConfig;
+		use super::{inject_runtime_type, DefaultConfig};
 
 		/// Provides a viable default config that can be used with
 		/// [`derive_impl`](`frame_support::derive_impl`) to derive a testing pallet config
@@ -232,6 +232,17 @@ pub mod pallet {
 			type BlockWeights = ();
 			type BlockLength = ();
 			type DbWeight = ();
+			#[inject_runtime_type]
+			type RuntimeEvent = ();
+			#[inject_runtime_type]
+			type RuntimeOrigin = ();
+			#[inject_runtime_type]
+			type RuntimeCall = ();
+			#[inject_runtime_type]
+			type PalletInfo = ();
+			type BaseCallFilter = frame_support::traits::Everything;
+			type BlockHashCount = frame_support::traits::ConstU64<10>;
+			type OnSetCode = ();
 		}
 	}
 
@@ -240,6 +251,7 @@ pub mod pallet {
 	#[pallet::disable_frame_system_supertrait_check]
 	pub trait Config: 'static + Eq + Clone {
 		/// The aggregated event type of the runtime.
+		#[pallet::no_default_bounds]
 		type RuntimeEvent: Parameter
 			+ Member
 			+ From<Event<Self>>
@@ -256,7 +268,7 @@ pub mod pallet {
 		/// [`frame_support::traits::InsideBoth`], [`frame_support::traits::TheseExcept`] or
 		/// [`frame_support::traits::EverythingBut`] et al. The default would be
 		/// [`frame_support::traits::Everything`].
-		#[pallet::no_default]
+		#[pallet::no_default_bounds]
 		type BaseCallFilter: Contains<Self::RuntimeCall>;
 
 		/// Block & extrinsics weights: base values and limits.
@@ -268,14 +280,14 @@ pub mod pallet {
 		type BlockLength: Get<limits::BlockLength>;
 
 		/// The `RuntimeOrigin` type used by dispatchable calls.
-		#[pallet::no_default]
+		#[pallet::no_default_bounds]
 		type RuntimeOrigin: Into<Result<RawOrigin<Self::AccountId>, Self::RuntimeOrigin>>
 			+ From<RawOrigin<Self::AccountId>>
 			+ Clone
 			+ OriginTrait<Call = Self::RuntimeCall, AccountId = Self::AccountId>;
 
 		/// The aggregated `RuntimeCall` type.
-		#[pallet::no_default]
+		#[pallet::no_default_bounds]
 		type RuntimeCall: Parameter
 			+ Dispatchable<RuntimeOrigin = Self::RuntimeOrigin>
 			+ Debug
@@ -335,7 +347,7 @@ pub mod pallet {
 
 		/// Maximum number of block number to block hash mappings to keep (oldest pruned first).
 		#[pallet::constant]
-		#[pallet::no_default]
+		#[pallet::no_default_bounds]
 		type BlockHashCount: Get<BlockNumberFor<Self>>;
 
 		/// The weight of runtime database operations the runtime can invoke.
@@ -350,7 +362,9 @@ pub mod pallet {
 		///
 		/// Expects the `PalletInfo` type that is being generated by `construct_runtime!` in the
 		/// runtime.
-		#[pallet::no_default]
+		///
+		/// For tests it is okay to use `()` as type, however it will provide "useless" data.
+		#[pallet::no_default_bounds]
 		type PalletInfo: PalletInfo;
 
 		/// Data to be associated with an account (other than nonce/transaction counter, which this
@@ -382,7 +396,7 @@ pub mod pallet {
 		/// [`Pallet::update_code_in_storage`]).
 		/// It's unlikely that this needs to be customized, unless you are writing a parachain using
 		/// `Cumulus`, where the actual code change is deferred.
-		#[pallet::no_default]
+		#[pallet::no_default_bounds]
 		type OnSetCode: SetCode<Self>;
 
 		/// The maximum number of consumers allowed on a single account.