add min runtime ui test

Cargo.toml

@@ -351,8 +351,8 @@ members = [
 	"substrate/frame/support/test",
 	"substrate/frame/support/test/compile_pass",
 	"substrate/frame/support/test/pallet",
-	"substrate/frame/support/test/pallet_frame_crate",
 	"substrate/frame/support/test/pallet_frame_crate/frame",
+	"substrate/frame/support/test/pallet_frame_crate",
 	"substrate/frame/system",
 	"substrate/frame/system/benchmarking",
 	"substrate/frame/system/rpc/runtime-api",

substrate/frame/support/procedural/tools/src/lib.rs

@@ -86,6 +86,18 @@ pub fn generate_crate_access_from_frame_or_deps(def_crate: &str) -> Result<syn::
 pub fn generate_hidden_includes(unique_id: &str, def_crate: &str) -> TokenStream {
 	let mod_name = generate_hidden_includes_mod_name(unique_id);
 
+	// TODO: improve this to avoid code duplication with `generate_crate_access_from_frame_or_deps`.
+	if let Ok(FoundCrate::Name(name)) = crate_name(&"frame") {
+		let path = format!("{}::deps::{}", name, def_crate.to_string().replace("-", "_"));
+		let path = syn::parse_str::<syn::Path>(&path).expect("is a valid path; qed");
+		return quote::quote!(
+			#[doc(hidden)]
+			mod #mod_name {
+				pub use #path as hidden_include;
+			}
+		)
+	}
+
 	match crate_name(def_crate) {
 		Ok(FoundCrate::Itself) => quote!(),
 		Ok(FoundCrate::Name(name)) => {

substrate/frame/support/test/pallet_frame_crate/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "frame-support-test-pallet-frame-crate"
-version = "4.0.0-dev"
+version = "0.1.0"
 authors.workspace = true
 edition.workspace = true
 license = "Apache-2.0"
@@ -13,10 +13,12 @@ targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.6.1", default-features = false, features = ["derive"] }
-scale-info = { version = "2.0.0", default-features = false, features = ["derive"] }
-serde = { version = "1.0.188", default-features = false, features = ["derive"] }
 frame = { path = "frame", default-features = false}
+rustversion = "1.0.6"
+scale-info = { version = "2.0.0", default-features = false, features = ["derive"] }
 sp-runtime = { path = "../../../../primitives/runtime", default-features = false}
+serde = { version = "1.0.188", default-features = false, features = ["derive"] }
+trybuild = { version = "1.0.74", features = [ "diff" ] }
 
 [features]
 default = [ "std" ]

substrate/frame/support/test/pallet_frame_crate/frame/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "frame"
-version = "4.0.0-dev"
+version = "0.1.0"
 authors.workspace = true
 edition.workspace = true
 license = "Apache-2.0"

substrate/frame/support/test/pallet_frame_crate/src/lib.rs

@@ -23,9 +23,12 @@
 
 pub use pallet::*;
 
-#[frame::deps::frame_support::pallet]
+use frame::deps::{frame_support, frame_system};
+
+#[frame_support::pallet]
 pub mod pallet {
-	use frame::deps::frame_support::pallet_prelude::*;
+	use super::*;
+	use frame_support::pallet_prelude::*;
 
 	#[pallet::pallet]
 	pub struct Pallet<T>(_);
@@ -36,13 +39,13 @@ pub mod pallet {
 	// pub trait Config: frame_system::Config {}
 	// ```
 	// if `frame_system` is brought into scope.
-	pub trait Config: frame::deps::frame_system::Config {}
+	pub trait Config: frame_system::Config {}
 
 	#[pallet::storage]
 	pub type Value<T> = StorageValue<_, u32>;
 
 	#[pallet::genesis_config]
-	#[derive(frame::deps::frame_support::DefaultNoBound)]
+	#[derive(frame_support::DefaultNoBound)]
 	pub struct GenesisConfig<T: Config> {
 		#[serde(skip)]
 		_config: core::marker::PhantomData<T>,

substrate/frame/support/test/pallet_frame_crate/tests/ui.rs

@@ -0,0 +1,35 @@
+// This file is part of Substrate.
+
+// Copyright (C) Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#[rustversion::attr(not(stable), ignore)]
+#[cfg(not(feature = "disable-ui-tests"))]
+#[test]
+fn frame_crate_ui() {
+	// Only run the ui tests when `RUN_UI_TESTS` is set.
+	if std::env::var("RUN_UI_TESTS").is_err() {
+		return
+	}
+
+	// As trybuild is using `cargo check`, we don't need the real WASM binaries.
+	std::env::set_var("SKIP_WASM_BUILD", "1");
+
+	// Deny all warnings since we emit warnings as part of a Pallet's UI.
+	std::env::set_var("RUSTFLAGS", "--deny warnings");
+
+	let t = trybuild::TestCases::new();
+	t.pass("tests/ui/*.rs");
+}

substrate/frame/support/test/pallet_frame_crate/tests/ui/min_runtime.rs

@@ -0,0 +1,40 @@
+// This file is part of Substrate.
+
+// Copyright (C) Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use frame::deps::{
+	frame_support::{construct_runtime, derive_impl},
+	frame_system,
+};
+
+type Block = frame_system::mocking::MockBlock<Runtime>;
+
+impl frame_support_test_pallet_frame_crate::pallet::Config for Runtime {}
+
+#[derive_impl(frame_system::config_preludes::TestDefaultConfig as frame_system::DefaultConfig)]
+impl frame_system::Config for Runtime {
+	type Block = Block;
+}
+
+construct_runtime! {
+	pub struct Runtime
+	{
+		System: frame_system::{Pallet, Call, Storage, Config<T>, Event<T>},
+		Pallet: frame_support_test_pallet_frame_crate::pallet::{Pallet, Config<T>},
+	}
+}
+
+fn main() {}