WIP

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

frame/support/test/tests/pallet_ui/storage_invalid_pov_estimate.rs

@@ -0,0 +1,18 @@
+#[frame_support::pallet]
+mod pallet {
+	use frame_support::pallet_prelude::Hooks;
+	use frame_system::pallet_prelude::BlockNumberFor;
+
+	#[pallet::config]
+	pub trait Config: frame_system::Config {}
+
+	#[pallet::pallet]
+	pub struct Pallet<T>(core::marker::PhantomData<T>);
+
+	#[pallet::storage]
+	#[pallet::pov_estimate = Wrong]
+	type Foo<T> = StorageValue<_, u8>;
+}
+
+fn main() {
+}

frame/support/test/tests/pallet_ui/storage_invalid_pov_estimate.stderr

@@ -0,0 +1,5 @@
+error: Invalid value for the proof_size attribute: Error("expected `MaxEncodedLen` or `Measured`")
+  --> tests/pallet_ui/storage_invalid_pov_estimate.rs:13:3
+   |
+13 |     #[pallet::pov_estimate = Wrong]
+   |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

frame/support/test/tests/pallet_ui/storage_multiple_pov_estimate.rs

@@ -0,0 +1,21 @@
+#[frame_support::pallet]
+mod pallet {
+	use frame_support::pallet_prelude::*;
+
+	#[pallet::config]
+	pub trait Config: frame_system::Config {}
+
+	#[pallet::pallet]
+	pub struct Pallet<T>(_);
+
+	#[pallet::error]
+	pub enum Error<T> {}
+
+	#[pallet::storage]
+	#[pallet::pov_estimate = MaxEncodedLen]
+	#[pallet::pov_estimate = MaxEncodedLen]
+	type Foo<T: Config> = StorageValue<_, u8>;
+}
+
+fn main() {
+}

frame/support/test/tests/pallet_ui/storage_multiple_pov_estimate.stderr

@@ -0,0 +1,5 @@
+error: Invalid attribute: Duplicate attribute
+  --> tests/pallet_ui/storage_multiple_pov_estimate.rs:16:3
+   |
+16 |     #[pallet::pov_estimate = MaxEncodedLen]
+   |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

frame/support/test/tests/pallet_ui/storage_pov_estimate_on_pallet.rs

@@ -0,0 +1,20 @@
+#[frame_support::pallet]
+mod pallet {
+	use frame_support::pallet_prelude::*;
+
+	#[pallet::config]
+	pub trait Config: frame_system::Config {}
+
+	#[pallet::pallet]
+	#[pallet::pov_estimate = MaxEncodedLen]
+	pub struct Pallet<T>(_);
+
+	#[pallet::error]
+	pub enum Error<T> {}
+
+	#[pallet::storage]
+	type Foo<T: Config> = StorageValue<_, u8>;
+}
+
+fn main() {
+}

frame/support/test/tests/pallet_ui/storage_pov_estimate_on_pallet.stderr

@@ -0,0 +1,5 @@
+error: expected one of: `generate_store`, `without_storage_info`, `storage_version`
+ --> tests/pallet_ui/storage_pov_estimate_on_pallet.rs:9:12
+  |
+9 |     #[pallet::pov_estimate = MaxEncodedLen]
+  |               ^^^^^^^^^^^^