Contracts add code_len to ContractsInfo (#14523)

* add code_len to v12

* fix

* Update frame/contracts/src/wasm/mod.rs

* fix

* fixes

* rm test

* add test back

* fix

* update test

* Fix comments

* fix build

* del

* fix clippy

* fix

* re-rename

substrate/frame/contracts/src/tests/pallet_dummy.rs

@@ -0,0 +1,33 @@
+pub use pallet::*;
+
+#[frame_support::pallet(dev_mode)]
+pub mod pallet {
+	use frame_support::{
+		dispatch::{Pays, PostDispatchInfo},
+		pallet_prelude::DispatchResultWithPostInfo,
+		weights::Weight,
+	};
+	use frame_system::pallet_prelude::*;
+
+	#[pallet::pallet]
+	pub struct Pallet<T>(_);
+
+	#[pallet::config]
+	pub trait Config: frame_system::Config {}
+
+	#[pallet::call]
+	impl<T: Config> Pallet<T> {
+		/// Dummy function that overcharges the predispatch weight, allowing us to test the correct
+		/// values of [`ContractResult::gas_consumed`] and [`ContractResult::gas_required`] in
+		/// tests.
+		#[pallet::call_index(1)]
+		#[pallet::weight(Weight::from_parts(10_000_000, 0))]
+		pub fn overestimate_pre_charge(origin: OriginFor<T>) -> DispatchResultWithPostInfo {
+			ensure_signed(origin)?;
+			Ok(PostDispatchInfo {
+				actual_weight: Some(Weight::from_parts(100, 0)),
+				pays_fee: Pays::Yes,
+			})
+		}
+	}
+}